./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:24:58,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:24:59,009 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:24:59,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:24:59,013 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:24:59,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:24:59,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:24:59,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:24:59,035 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:24:59,035 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:24:59,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:24:59,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:24:59,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:24:59,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:24:59,037 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:24:59,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:24:59,038 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:24:59,038 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:24:59,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:24:59,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:24:59,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:24:59,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:24:59,039 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:24:59,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:24:59,040 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:24:59,040 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:24:59,041 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:24:59,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:24:59,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:24:59,041 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:24:59,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:24:59,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:24:59,042 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:24:59,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:24:59,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:24:59,043 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:24:59,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:24:59,043 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:24:59,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:24:59,044 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:24:59,044 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:24:59,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:24:59,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:24:59,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:24:59,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:24:59,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:24:59,232 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:24:59,232 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:24:59,233 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-11-22 18:25:00,284 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:25:00,463 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:25:00,464 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-11-22 18:25:00,470 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276922e99/fc4bb4dc61ed446bb145ba3a3852a957/FLAG91679eccd [2023-11-22 18:25:00,481 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276922e99/fc4bb4dc61ed446bb145ba3a3852a957 [2023-11-22 18:25:00,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:25:00,484 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:25:00,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:25:00,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:25:00,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:25:00,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65be4537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00, skipping insertion in model container [2023-11-22 18:25:00,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,505 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:25:00,623 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2023-11-22 18:25:00,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:25:00,636 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:25:00,656 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2023-11-22 18:25:00,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:25:00,669 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:25:00,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00 WrapperNode [2023-11-22 18:25:00,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:25:00,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:25:00,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:25:00,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:25:00,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,697 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 117 [2023-11-22 18:25:00,698 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:25:00,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:25:00,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:25:00,699 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:25:00,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,709 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,719 INFO L189 HeapSplitter]: Split 12 memory accesses to 4 slices as follows [2, 6, 2, 2] [2023-11-22 18:25:00,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,719 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,724 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:25:00,732 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:25:00,732 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:25:00,732 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:25:00,733 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (1/1) ... [2023-11-22 18:25:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:25:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:00,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 18:25:00,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 18:25:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:25:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-22 18:25:00,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-22 18:25:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-22 18:25:00,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-22 18:25:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:25:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:25:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:25:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 18:25:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:25:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:25:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:25:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:25:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-22 18:25:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 18:25:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:25:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:25:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:25:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:25:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:25:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-22 18:25:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:25:00,824 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 18:25:00,916 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:25:00,918 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:25:01,098 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:25:01,305 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:25:01,305 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-22 18:25:01,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:25:01 BoogieIcfgContainer [2023-11-22 18:25:01,305 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:25:01,307 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:25:01,307 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:25:01,309 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:25:01,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:25:00" (1/3) ... [2023-11-22 18:25:01,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ba9805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:25:01, skipping insertion in model container [2023-11-22 18:25:01,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:25:00" (2/3) ... [2023-11-22 18:25:01,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ba9805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:25:01, skipping insertion in model container [2023-11-22 18:25:01,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:25:01" (3/3) ... [2023-11-22 18:25:01,341 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-11-22 18:25:01,347 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-22 18:25:01,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:25:01,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:25:01,354 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 18:25:01,392 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-22 18:25:01,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2023-11-22 18:25:01,435 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-22 18:25:01,435 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 18:25:01,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-22 18:25:01,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2023-11-22 18:25:01,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2023-11-22 18:25:01,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:25:01,452 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;@55c98a3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:25:01,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-22 18:25:01,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 18:25:01,461 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2023-11-22 18:25:01,461 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 18:25:01,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:01,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:01,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:01,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash -28525233, now seen corresponding path program 1 times [2023-11-22 18:25:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:01,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659118881] [2023-11-22 18:25:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:25:01,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:01,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659118881] [2023-11-22 18:25:01,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659118881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:01,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:01,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:25:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46552153] [2023-11-22 18:25:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:01,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:25:01,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:01,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:25:01,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:25:01,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:01,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:01,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:01,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:01,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:02,035 INFO L124 PetriNetUnfolderBase]: 219/344 cut-off events. [2023-11-22 18:25:02,036 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-22 18:25:02,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 344 events. 219/344 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1216 event pairs, 45 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 596. Up to 221 conditions per place. [2023-11-22 18:25:02,040 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 35 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2023-11-22 18:25:02,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 183 flow [2023-11-22 18:25:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:25:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 18:25:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-22 18:25:02,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2023-11-22 18:25:02,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-22 18:25:02,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-22 18:25:02,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:02,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-22 18:25:02,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:02,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 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) [2023-11-22 18:25:02,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 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) [2023-11-22 18:25:02,057 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 3 states and 55 transitions. [2023-11-22 18:25:02,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 183 flow [2023-11-22 18:25:02,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-22 18:25:02,061 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 75 flow [2023-11-22 18:25:02,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2023-11-22 18:25:02,065 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-11-22 18:25:02,065 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 75 flow [2023-11-22 18:25:02,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:02,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:02,065 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] [2023-11-22 18:25:02,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:25:02,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:02,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:02,067 INFO L85 PathProgramCache]: Analyzing trace with hash 135500589, now seen corresponding path program 1 times [2023-11-22 18:25:02,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:02,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394227611] [2023-11-22 18:25:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:02,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:25:02,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:02,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394227611] [2023-11-22 18:25:02,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394227611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:02,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:02,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:25:02,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873350317] [2023-11-22 18:25:02,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:02,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:25:02,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:25:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:25:02,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:02,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2023-11-22 18:25:02,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:02,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:02,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:02,235 INFO L124 PetriNetUnfolderBase]: 314/520 cut-off events. [2023-11-22 18:25:02,235 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-22 18:25:02,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 520 events. 314/520 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2111 event pairs, 184 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 424. Up to 340 conditions per place. [2023-11-22 18:25:02,238 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 42 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-22 18:25:02,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 224 flow [2023-11-22 18:25:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:25:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 18:25:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2023-11-22 18:25:02,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-11-22 18:25:02,239 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 70 transitions. [2023-11-22 18:25:02,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 70 transitions. [2023-11-22 18:25:02,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:02,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 70 transitions. [2023-11-22 18:25:02,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2023-11-22 18:25:02,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 18:25:02,241 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 18:25:02,242 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 75 flow. Second operand 5 states and 70 transitions. [2023-11-22 18:25:02,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 224 flow [2023-11-22 18:25:02,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 18:25:02,243 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 108 flow [2023-11-22 18:25:02,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2023-11-22 18:25:02,244 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-11-22 18:25:02,244 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 108 flow [2023-11-22 18:25:02,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2023-11-22 18:25:02,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:02,244 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] [2023-11-22 18:25:02,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 18:25:02,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:02,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash -891589587, now seen corresponding path program 1 times [2023-11-22 18:25:02,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:02,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711755723] [2023-11-22 18:25:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:25:02,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:02,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711755723] [2023-11-22 18:25:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711755723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:02,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:02,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:25:02,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530712794] [2023-11-22 18:25:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:02,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:25:02,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:25:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:25:02,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:02,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2023-11-22 18:25:02,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:02,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:02,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:02,472 INFO L124 PetriNetUnfolderBase]: 245/408 cut-off events. [2023-11-22 18:25:02,472 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-22 18:25:02,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 408 events. 245/408 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1573 event pairs, 139 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 769. Up to 340 conditions per place. [2023-11-22 18:25:02,475 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 2 changer transitions 16/45 dead transitions. [2023-11-22 18:25:02,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 226 flow [2023-11-22 18:25:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:25:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 18:25:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-22 18:25:02,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-11-22 18:25:02,478 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-22 18:25:02,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-22 18:25:02,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:02,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-22 18:25:02,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-22 18:25:02,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 18:25:02,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 18:25:02,482 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 108 flow. Second operand 5 states and 66 transitions. [2023-11-22 18:25:02,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 226 flow [2023-11-22 18:25:02,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-22 18:25:02,484 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 92 flow [2023-11-22 18:25:02,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-22 18:25:02,485 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-11-22 18:25:02,486 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 92 flow [2023-11-22 18:25:02,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2023-11-22 18:25:02,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:02,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:02,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 18:25:02,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:02,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash -582652510, now seen corresponding path program 1 times [2023-11-22 18:25:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:02,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368018080] [2023-11-22 18:25:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:02,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:02,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368018080] [2023-11-22 18:25:02,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368018080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:02,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:02,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 18:25:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971137783] [2023-11-22 18:25:02,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:02,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 18:25:02,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 18:25:02,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:25:02,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:02,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-11-22 18:25:02,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:02,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:02,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:02,689 INFO L124 PetriNetUnfolderBase]: 312/517 cut-off events. [2023-11-22 18:25:02,690 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-11-22 18:25:02,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 517 events. 312/517 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2121 event pairs, 184 based on Foata normal form. 18/526 useless extension candidates. Maximal degree in co-relation 1180. Up to 340 conditions per place. [2023-11-22 18:25:02,692 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-11-22 18:25:02,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 232 flow [2023-11-22 18:25:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:25:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 18:25:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-22 18:25:02,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-11-22 18:25:02,695 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-22 18:25:02,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-22 18:25:02,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:02,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-22 18:25:02,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-22 18:25:02,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 18:25:02,698 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 18:25:02,699 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 92 flow. Second operand 5 states and 66 transitions. [2023-11-22 18:25:02,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 232 flow [2023-11-22 18:25:02,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 214 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-22 18:25:02,702 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 102 flow [2023-11-22 18:25:02,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-22 18:25:02,705 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2023-11-22 18:25:02,705 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 102 flow [2023-11-22 18:25:02,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-11-22 18:25:02,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:02,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:02,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 18:25:02,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:02,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash -700286942, now seen corresponding path program 1 times [2023-11-22 18:25:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:02,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003838256] [2023-11-22 18:25:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:02,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:02,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003838256] [2023-11-22 18:25:02,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003838256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:02,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:02,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 18:25:02,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110686369] [2023-11-22 18:25:02,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:02,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 18:25:02,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:02,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 18:25:02,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:25:02,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:02,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-11-22 18:25:02,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:02,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:02,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:02,883 INFO L124 PetriNetUnfolderBase]: 291/486 cut-off events. [2023-11-22 18:25:02,883 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-22 18:25:02,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 486 events. 291/486 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1968 event pairs, 123 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 1072. Up to 254 conditions per place. [2023-11-22 18:25:02,885 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 5 changer transitions 12/57 dead transitions. [2023-11-22 18:25:02,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 276 flow [2023-11-22 18:25:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:25:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 18:25:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2023-11-22 18:25:02,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5310344827586206 [2023-11-22 18:25:02,887 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2023-11-22 18:25:02,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2023-11-22 18:25:02,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:02,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2023-11-22 18:25:02,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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) [2023-11-22 18:25:02,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 18:25:02,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2023-11-22 18:25:02,888 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 102 flow. Second operand 5 states and 77 transitions. [2023-11-22 18:25:02,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 276 flow [2023-11-22 18:25:02,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 57 transitions, 270 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-22 18:25:02,890 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 113 flow [2023-11-22 18:25:02,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-22 18:25:02,891 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-11-22 18:25:02,891 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 113 flow [2023-11-22 18:25:02,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2023-11-22 18:25:02,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:02,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:02,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 18:25:02,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:02,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1671653826, now seen corresponding path program 1 times [2023-11-22 18:25:02,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:02,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745465936] [2023-11-22 18:25:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:25:03,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:03,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745465936] [2023-11-22 18:25:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745465936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:03,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553589188] [2023-11-22 18:25:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:03,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:03,037 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) [2023-11-22 18:25:03,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 18:25:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:03,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 18:25:03,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:25:03,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:25:03,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553589188] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:03,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 18:25:03,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2023-11-22 18:25:03,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67375298] [2023-11-22 18:25:03,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:03,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 18:25:03,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:03,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 18:25:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-22 18:25:03,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:03,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:03,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:03,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:03,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:03,524 INFO L124 PetriNetUnfolderBase]: 277/464 cut-off events. [2023-11-22 18:25:03,524 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-11-22 18:25:03,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 464 events. 277/464 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1786 event pairs, 99 based on Foata normal form. 15/473 useless extension candidates. Maximal degree in co-relation 1120. Up to 231 conditions per place. [2023-11-22 18:25:03,527 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 44 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-22 18:25:03,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 283 flow [2023-11-22 18:25:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-22 18:25:03,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-22 18:25:03,528 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-22 18:25:03,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-22 18:25:03,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:03,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-22 18:25:03,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:03,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:03,530 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:03,530 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 113 flow. Second operand 7 states and 86 transitions. [2023-11-22 18:25:03,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 283 flow [2023-11-22 18:25:03,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 268 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-22 18:25:03,532 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 134 flow [2023-11-22 18:25:03,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-22 18:25:03,532 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2023-11-22 18:25:03,532 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 134 flow [2023-11-22 18:25:03,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:03,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:03,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:03,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-22 18:25:03,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 18:25:03,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:03,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash 441212046, now seen corresponding path program 1 times [2023-11-22 18:25:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497873402] [2023-11-22 18:25:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:03,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:03,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497873402] [2023-11-22 18:25:03,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497873402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:03,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288528865] [2023-11-22 18:25:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:03,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:03,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:03,871 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) [2023-11-22 18:25:03,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 18:25:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:03,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 18:25:03,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:04,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:04,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288528865] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:04,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 18:25:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-22 18:25:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533747256] [2023-11-22 18:25:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:04,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 18:25:04,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 18:25:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-22 18:25:04,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:04,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:04,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:04,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:04,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:04,214 INFO L124 PetriNetUnfolderBase]: 383/696 cut-off events. [2023-11-22 18:25:04,214 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2023-11-22 18:25:04,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 696 events. 383/696 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3153 event pairs, 153 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1726. Up to 243 conditions per place. [2023-11-22 18:25:04,217 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2023-11-22 18:25:04,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 368 flow [2023-11-22 18:25:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-22 18:25:04,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2023-11-22 18:25:04,219 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-22 18:25:04,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-22 18:25:04,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:04,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-22 18:25:04,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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) [2023-11-22 18:25:04,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:04,220 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:04,220 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 134 flow. Second operand 7 states and 90 transitions. [2023-11-22 18:25:04,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 368 flow [2023-11-22 18:25:04,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 346 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-22 18:25:04,222 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 152 flow [2023-11-22 18:25:04,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-22 18:25:04,222 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-11-22 18:25:04,223 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 152 flow [2023-11-22 18:25:04,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:04,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:04,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:04,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:04,434 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,SelfDestructingSolverStorable6 [2023-11-22 18:25:04,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:04,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:04,436 INFO L85 PathProgramCache]: Analyzing trace with hash 272603849, now seen corresponding path program 1 times [2023-11-22 18:25:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:04,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359686447] [2023-11-22 18:25:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:04,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:04,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:04,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359686447] [2023-11-22 18:25:04,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359686447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:04,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:04,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:25:04,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963917771] [2023-11-22 18:25:04,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:04,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:04,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:04,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:04,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:25:04,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:04,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:04,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:04,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:04,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:04,907 INFO L124 PetriNetUnfolderBase]: 396/717 cut-off events. [2023-11-22 18:25:04,907 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2023-11-22 18:25:04,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 717 events. 396/717 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3201 event pairs, 117 based on Foata normal form. 6/720 useless extension candidates. Maximal degree in co-relation 1882. Up to 589 conditions per place. [2023-11-22 18:25:04,911 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 42 selfloop transitions, 11 changer transitions 7/63 dead transitions. [2023-11-22 18:25:04,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 359 flow [2023-11-22 18:25:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-22 18:25:04,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2023-11-22 18:25:04,912 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-22 18:25:04,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-22 18:25:04,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:04,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-22 18:25:04,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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) [2023-11-22 18:25:04,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:04,914 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:04,914 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 152 flow. Second operand 7 states and 90 transitions. [2023-11-22 18:25:04,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 359 flow [2023-11-22 18:25:04,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 18:25:04,916 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 230 flow [2023-11-22 18:25:04,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-11-22 18:25:04,916 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-11-22 18:25:04,916 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 230 flow [2023-11-22 18:25:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:04,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:04,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 18:25:04,917 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:04,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:04,918 INFO L85 PathProgramCache]: Analyzing trace with hash -119994201, now seen corresponding path program 2 times [2023-11-22 18:25:04,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:04,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889638536] [2023-11-22 18:25:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:04,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:05,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:05,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889638536] [2023-11-22 18:25:05,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889638536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:05,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:05,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:25:05,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393941544] [2023-11-22 18:25:05,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:05,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:05,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:05,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:05,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:25:05,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:05,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:05,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:05,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:05,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:05,353 INFO L124 PetriNetUnfolderBase]: 394/714 cut-off events. [2023-11-22 18:25:05,354 INFO L125 PetriNetUnfolderBase]: For 758/758 co-relation queries the response was YES. [2023-11-22 18:25:05,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 714 events. 394/714 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3221 event pairs, 87 based on Foata normal form. 6/719 useless extension candidates. Maximal degree in co-relation 2194. Up to 589 conditions per place. [2023-11-22 18:25:05,358 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 44 selfloop transitions, 10 changer transitions 11/68 dead transitions. [2023-11-22 18:25:05,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 453 flow [2023-11-22 18:25:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2023-11-22 18:25:05,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2023-11-22 18:25:05,360 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 92 transitions. [2023-11-22 18:25:05,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 92 transitions. [2023-11-22 18:25:05,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:05,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 92 transitions. [2023-11-22 18:25:05,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2023-11-22 18:25:05,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:05,361 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:05,361 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 230 flow. Second operand 7 states and 92 transitions. [2023-11-22 18:25:05,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 68 transitions, 453 flow [2023-11-22 18:25:05,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 423 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-22 18:25:05,365 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 245 flow [2023-11-22 18:25:05,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-11-22 18:25:05,366 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-11-22 18:25:05,366 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 245 flow [2023-11-22 18:25:05,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:05,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:05,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:05,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 18:25:05,367 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:05,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:05,367 INFO L85 PathProgramCache]: Analyzing trace with hash 159985065, now seen corresponding path program 3 times [2023-11-22 18:25:05,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:05,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256246660] [2023-11-22 18:25:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:05,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:05,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256246660] [2023-11-22 18:25:05,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256246660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:05,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:05,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:25:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392776977] [2023-11-22 18:25:05,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:05,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:05,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:25:05,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:05,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:05,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:05,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:05,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:05,756 INFO L124 PetriNetUnfolderBase]: 376/691 cut-off events. [2023-11-22 18:25:05,756 INFO L125 PetriNetUnfolderBase]: For 843/852 co-relation queries the response was YES. [2023-11-22 18:25:05,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2151 conditions, 691 events. 376/691 cut-off events. For 843/852 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3037 event pairs, 153 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 2120. Up to 583 conditions per place. [2023-11-22 18:25:05,759 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 34 selfloop transitions, 14 changer transitions 11/62 dead transitions. [2023-11-22 18:25:05,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 437 flow [2023-11-22 18:25:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-22 18:25:05,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-22 18:25:05,761 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-22 18:25:05,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-22 18:25:05,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:05,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-22 18:25:05,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:05,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:05,762 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:05,762 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 245 flow. Second operand 7 states and 86 transitions. [2023-11-22 18:25:05,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 437 flow [2023-11-22 18:25:05,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 405 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-22 18:25:05,765 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 286 flow [2023-11-22 18:25:05,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-11-22 18:25:05,766 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-11-22 18:25:05,766 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 286 flow [2023-11-22 18:25:05,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:05,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:05,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:05,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-22 18:25:05,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:05,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1308181757, now seen corresponding path program 1 times [2023-11-22 18:25:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678262027] [2023-11-22 18:25:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:05,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:06,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:06,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678262027] [2023-11-22 18:25:06,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678262027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:06,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:06,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:25:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275855082] [2023-11-22 18:25:06,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:06,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:25:06,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:06,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 286 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:06,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:06,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:06,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:06,167 INFO L124 PetriNetUnfolderBase]: 352/642 cut-off events. [2023-11-22 18:25:06,167 INFO L125 PetriNetUnfolderBase]: For 843/849 co-relation queries the response was YES. [2023-11-22 18:25:06,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 642 events. 352/642 cut-off events. For 843/849 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2699 event pairs, 159 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 2024. Up to 583 conditions per place. [2023-11-22 18:25:06,170 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 13 changer transitions 4/55 dead transitions. [2023-11-22 18:25:06,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 427 flow [2023-11-22 18:25:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2023-11-22 18:25:06,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2023-11-22 18:25:06,172 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 76 transitions. [2023-11-22 18:25:06,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 76 transitions. [2023-11-22 18:25:06,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:06,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 76 transitions. [2023-11-22 18:25:06,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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) [2023-11-22 18:25:06,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:06,173 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:06,173 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 286 flow. Second operand 7 states and 76 transitions. [2023-11-22 18:25:06,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 427 flow [2023-11-22 18:25:06,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 415 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-22 18:25:06,177 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 309 flow [2023-11-22 18:25:06,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-11-22 18:25:06,177 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2023-11-22 18:25:06,177 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 309 flow [2023-11-22 18:25:06,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:06,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:06,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:06,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 18:25:06,178 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:06,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:06,179 INFO L85 PathProgramCache]: Analyzing trace with hash 814749745, now seen corresponding path program 2 times [2023-11-22 18:25:06,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:06,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489696797] [2023-11-22 18:25:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:06,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:06,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489696797] [2023-11-22 18:25:06,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489696797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:06,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100601694] [2023-11-22 18:25:06,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:25:06,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:06,436 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) [2023-11-22 18:25:06,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 18:25:06,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:25:06,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:06,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 18:25:06,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:06,650 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:25:06,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 18:25:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:06,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:06,735 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:06,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100601694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:06,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:06,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2023-11-22 18:25:06,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364682519] [2023-11-22 18:25:06,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 18:25:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 18:25:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-22 18:25:06,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:06,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 309 flow. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:06,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:06,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:06,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:06,959 INFO L124 PetriNetUnfolderBase]: 368/665 cut-off events. [2023-11-22 18:25:06,959 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2023-11-22 18:25:06,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 665 events. 368/665 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2837 event pairs, 59 based on Foata normal form. 16/680 useless extension candidates. Maximal degree in co-relation 2120. Up to 423 conditions per place. [2023-11-22 18:25:06,963 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 55 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2023-11-22 18:25:06,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 548 flow [2023-11-22 18:25:06,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 18:25:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-22 18:25:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2023-11-22 18:25:06,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2023-11-22 18:25:06,964 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 102 transitions. [2023-11-22 18:25:06,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 102 transitions. [2023-11-22 18:25:06,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:06,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 102 transitions. [2023-11-22 18:25:06,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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) [2023-11-22 18:25:06,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-22 18:25:06,966 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-22 18:25:06,966 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 309 flow. Second operand 8 states and 102 transitions. [2023-11-22 18:25:06,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 548 flow [2023-11-22 18:25:06,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 517 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-22 18:25:06,970 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 320 flow [2023-11-22 18:25:06,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2023-11-22 18:25:06,972 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2023-11-22 18:25:06,972 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 320 flow [2023-11-22 18:25:06,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:06,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:06,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:06,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:07,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:07,185 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:07,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash 698164213, now seen corresponding path program 3 times [2023-11-22 18:25:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:07,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423156525] [2023-11-22 18:25:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:07,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423156525] [2023-11-22 18:25:07,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423156525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106127575] [2023-11-22 18:25:07,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:25:07,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:07,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:07,436 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) [2023-11-22 18:25:07,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 18:25:07,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 18:25:07,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:07,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 18:25:07,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:07,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:07,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 18:25:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:07,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:07,708 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:07,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:07,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106127575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:07,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:07,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 13 [2023-11-22 18:25:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914356007] [2023-11-22 18:25:07,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:07,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 18:25:07,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 18:25:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:25:07,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:07,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 320 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:07,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:07,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:07,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:07,998 INFO L124 PetriNetUnfolderBase]: 508/939 cut-off events. [2023-11-22 18:25:07,998 INFO L125 PetriNetUnfolderBase]: For 1800/1800 co-relation queries the response was YES. [2023-11-22 18:25:08,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3145 conditions, 939 events. 508/939 cut-off events. For 1800/1800 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4531 event pairs, 121 based on Foata normal form. 24/962 useless extension candidates. Maximal degree in co-relation 3111. Up to 661 conditions per place. [2023-11-22 18:25:08,004 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 74 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2023-11-22 18:25:08,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 721 flow [2023-11-22 18:25:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 18:25:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-22 18:25:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2023-11-22 18:25:08,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-11-22 18:25:08,005 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 150 transitions. [2023-11-22 18:25:08,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 150 transitions. [2023-11-22 18:25:08,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:08,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 150 transitions. [2023-11-22 18:25:08,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 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) [2023-11-22 18:25:08,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 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) [2023-11-22 18:25:08,007 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 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) [2023-11-22 18:25:08,007 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 320 flow. Second operand 12 states and 150 transitions. [2023-11-22 18:25:08,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 721 flow [2023-11-22 18:25:08,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 656 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-22 18:25:08,012 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 416 flow [2023-11-22 18:25:08,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=416, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-22 18:25:08,013 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2023-11-22 18:25:08,013 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 416 flow [2023-11-22 18:25:08,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:08,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:08,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:08,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:08,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:08,232 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:08,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1966259215, now seen corresponding path program 4 times [2023-11-22 18:25:08,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:08,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014656783] [2023-11-22 18:25:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:08,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:08,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:08,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014656783] [2023-11-22 18:25:08,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014656783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:08,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:08,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:25:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43172171] [2023-11-22 18:25:08,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:25:08,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:08,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 416 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:08,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:08,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:08,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:08,647 INFO L124 PetriNetUnfolderBase]: 526/969 cut-off events. [2023-11-22 18:25:08,648 INFO L125 PetriNetUnfolderBase]: For 1939/1939 co-relation queries the response was YES. [2023-11-22 18:25:08,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 969 events. 526/969 cut-off events. For 1939/1939 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4760 event pairs, 177 based on Foata normal form. 12/980 useless extension candidates. Maximal degree in co-relation 3392. Up to 897 conditions per place. [2023-11-22 18:25:08,653 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 53 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2023-11-22 18:25:08,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 608 flow [2023-11-22 18:25:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-22 18:25:08,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-22 18:25:08,655 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-22 18:25:08,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-22 18:25:08,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:08,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-22 18:25:08,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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) [2023-11-22 18:25:08,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:08,656 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:08,656 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 416 flow. Second operand 7 states and 84 transitions. [2023-11-22 18:25:08,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 608 flow [2023-11-22 18:25:08,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 579 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-22 18:25:08,660 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 431 flow [2023-11-22 18:25:08,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-22 18:25:08,661 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2023-11-22 18:25:08,661 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 431 flow [2023-11-22 18:25:08,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:08,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:08,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:08,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-22 18:25:08,662 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:08,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:08,662 INFO L85 PathProgramCache]: Analyzing trace with hash 595539543, now seen corresponding path program 4 times [2023-11-22 18:25:08,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:08,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943595827] [2023-11-22 18:25:08,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:08,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:08,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:08,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943595827] [2023-11-22 18:25:08,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943595827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:08,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:08,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:25:08,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319937188] [2023-11-22 18:25:08,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:08,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:08,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:08,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:08,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:25:08,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:08,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 431 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:08,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:08,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:08,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:09,062 INFO L124 PetriNetUnfolderBase]: 480/866 cut-off events. [2023-11-22 18:25:09,062 INFO L125 PetriNetUnfolderBase]: For 2025/2025 co-relation queries the response was YES. [2023-11-22 18:25:09,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3206 conditions, 866 events. 480/866 cut-off events. For 2025/2025 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3984 event pairs, 167 based on Foata normal form. 4/869 useless extension candidates. Maximal degree in co-relation 3169. Up to 817 conditions per place. [2023-11-22 18:25:09,067 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 48 selfloop transitions, 12 changer transitions 3/66 dead transitions. [2023-11-22 18:25:09,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 563 flow [2023-11-22 18:25:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2023-11-22 18:25:09,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2023-11-22 18:25:09,068 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 79 transitions. [2023-11-22 18:25:09,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 79 transitions. [2023-11-22 18:25:09,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:09,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 79 transitions. [2023-11-22 18:25:09,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:09,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:09,070 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:09,070 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 431 flow. Second operand 7 states and 79 transitions. [2023-11-22 18:25:09,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 563 flow [2023-11-22 18:25:09,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 537 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 18:25:09,074 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 404 flow [2023-11-22 18:25:09,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2023-11-22 18:25:09,075 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2023-11-22 18:25:09,075 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 404 flow [2023-11-22 18:25:09,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:09,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:09,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:09,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-22 18:25:09,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:09,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash 421230357, now seen corresponding path program 5 times [2023-11-22 18:25:09,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:09,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234174799] [2023-11-22 18:25:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:09,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:09,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:09,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234174799] [2023-11-22 18:25:09,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234174799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:09,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731910381] [2023-11-22 18:25:09,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:25:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:09,304 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) [2023-11-22 18:25:09,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 18:25:09,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:25:09,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:09,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 18:25:09,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:09,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:09,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-22 18:25:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:09,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:09,583 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:09,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:09,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731910381] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:09,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 18:25:09,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 14 [2023-11-22 18:25:09,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535096506] [2023-11-22 18:25:09,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:09,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 18:25:09,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:09,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 18:25:09,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-22 18:25:09,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:09,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2023-11-22 18:25:09,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:09,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:09,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:09,778 INFO L124 PetriNetUnfolderBase]: 454/837 cut-off events. [2023-11-22 18:25:09,778 INFO L125 PetriNetUnfolderBase]: For 1964/1973 co-relation queries the response was YES. [2023-11-22 18:25:09,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3007 conditions, 837 events. 454/837 cut-off events. For 1964/1973 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3919 event pairs, 135 based on Foata normal form. 30/865 useless extension candidates. Maximal degree in co-relation 2970. Up to 658 conditions per place. [2023-11-22 18:25:09,782 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 57 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2023-11-22 18:25:09,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 607 flow [2023-11-22 18:25:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 18:25:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 18:25:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2023-11-22 18:25:09,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2023-11-22 18:25:09,784 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 81 transitions. [2023-11-22 18:25:09,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 81 transitions. [2023-11-22 18:25:09,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:09,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 81 transitions. [2023-11-22 18:25:09,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2023-11-22 18:25:09,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-22 18:25:09,785 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-22 18:25:09,785 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 404 flow. Second operand 6 states and 81 transitions. [2023-11-22 18:25:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 607 flow [2023-11-22 18:25:09,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 583 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 18:25:09,790 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 412 flow [2023-11-22 18:25:09,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=412, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-22 18:25:09,790 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2023-11-22 18:25:09,790 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 412 flow [2023-11-22 18:25:09,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2023-11-22 18:25:09,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:09,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:09,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:10,002 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,SelfDestructingSolverStorable15 [2023-11-22 18:25:10,003 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:10,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:10,003 INFO L85 PathProgramCache]: Analyzing trace with hash -837236101, now seen corresponding path program 5 times [2023-11-22 18:25:10,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:10,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287382285] [2023-11-22 18:25:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:10,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:10,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:10,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287382285] [2023-11-22 18:25:10,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287382285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:10,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981966950] [2023-11-22 18:25:10,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:25:10,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:10,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:10,229 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) [2023-11-22 18:25:10,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 18:25:10,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:25:10,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:10,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 18:25:10,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:10,373 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 18:25:10,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 18:25:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:10,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:10,454 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:10,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:10,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981966950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:10,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:10,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-11-22 18:25:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845203968] [2023-11-22 18:25:10,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:10,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 18:25:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 18:25:10,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-22 18:25:10,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:10,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 412 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 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) [2023-11-22 18:25:10,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:10,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:10,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:10,696 INFO L124 PetriNetUnfolderBase]: 472/867 cut-off events. [2023-11-22 18:25:10,696 INFO L125 PetriNetUnfolderBase]: For 2018/2027 co-relation queries the response was YES. [2023-11-22 18:25:10,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 867 events. 472/867 cut-off events. For 2018/2027 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4086 event pairs, 127 based on Foata normal form. 18/883 useless extension candidates. Maximal degree in co-relation 3171. Up to 645 conditions per place. [2023-11-22 18:25:10,701 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 59 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2023-11-22 18:25:10,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 79 transitions, 669 flow [2023-11-22 18:25:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 18:25:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-22 18:25:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2023-11-22 18:25:10,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2023-11-22 18:25:10,703 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 98 transitions. [2023-11-22 18:25:10,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 98 transitions. [2023-11-22 18:25:10,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:10,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 98 transitions. [2023-11-22 18:25:10,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:10,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-22 18:25:10,705 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 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) [2023-11-22 18:25:10,705 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 412 flow. Second operand 8 states and 98 transitions. [2023-11-22 18:25:10,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 79 transitions, 669 flow [2023-11-22 18:25:10,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 647 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-22 18:25:10,734 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 438 flow [2023-11-22 18:25:10,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-11-22 18:25:10,734 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2023-11-22 18:25:10,734 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 438 flow [2023-11-22 18:25:10,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 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) [2023-11-22 18:25:10,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:10,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:10,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:10,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 18:25:10,945 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:10,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash -859964759, now seen corresponding path program 6 times [2023-11-22 18:25:10,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903834864] [2023-11-22 18:25:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:11,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:11,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903834864] [2023-11-22 18:25:11,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903834864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:11,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:11,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:25:11,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100118000] [2023-11-22 18:25:11,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:11,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:11,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:25:11,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:11,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:11,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:11,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:11,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:11,301 INFO L124 PetriNetUnfolderBase]: 426/764 cut-off events. [2023-11-22 18:25:11,302 INFO L125 PetriNetUnfolderBase]: For 2321/2330 co-relation queries the response was YES. [2023-11-22 18:25:11,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 764 events. 426/764 cut-off events. For 2321/2330 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3372 event pairs, 135 based on Foata normal form. 10/772 useless extension candidates. Maximal degree in co-relation 2953. Up to 723 conditions per place. [2023-11-22 18:25:11,306 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 45 selfloop transitions, 11 changer transitions 3/62 dead transitions. [2023-11-22 18:25:11,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 62 transitions, 553 flow [2023-11-22 18:25:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2023-11-22 18:25:11,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2023-11-22 18:25:11,307 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 75 transitions. [2023-11-22 18:25:11,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 75 transitions. [2023-11-22 18:25:11,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:11,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 75 transitions. [2023-11-22 18:25:11,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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) [2023-11-22 18:25:11,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:11,308 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:11,309 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 438 flow. Second operand 7 states and 75 transitions. [2023-11-22 18:25:11,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 62 transitions, 553 flow [2023-11-22 18:25:11,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 499 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-22 18:25:11,313 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 384 flow [2023-11-22 18:25:11,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-11-22 18:25:11,314 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2023-11-22 18:25:11,314 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 384 flow [2023-11-22 18:25:11,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:11,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:11,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:11,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-22 18:25:11,315 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:11,316 INFO L85 PathProgramCache]: Analyzing trace with hash -795919207, now seen corresponding path program 6 times [2023-11-22 18:25:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:11,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563608469] [2023-11-22 18:25:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563608469] [2023-11-22 18:25:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563608469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:11,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:25:11,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:25:11,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291075946] [2023-11-22 18:25:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:25:11,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:11,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 384 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:11,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:11,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:11,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:11,682 INFO L124 PetriNetUnfolderBase]: 376/668 cut-off events. [2023-11-22 18:25:11,683 INFO L125 PetriNetUnfolderBase]: For 1632/1641 co-relation queries the response was YES. [2023-11-22 18:25:11,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2583 conditions, 668 events. 376/668 cut-off events. For 1632/1641 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2806 event pairs, 105 based on Foata normal form. 18/684 useless extension candidates. Maximal degree in co-relation 2546. Up to 615 conditions per place. [2023-11-22 18:25:11,686 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 50 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-11-22 18:25:11,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 551 flow [2023-11-22 18:25:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2023-11-22 18:25:11,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2023-11-22 18:25:11,688 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 79 transitions. [2023-11-22 18:25:11,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 79 transitions. [2023-11-22 18:25:11,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:11,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 79 transitions. [2023-11-22 18:25:11,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:11,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:11,690 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:11,690 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 384 flow. Second operand 7 states and 79 transitions. [2023-11-22 18:25:11,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 551 flow [2023-11-22 18:25:11,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 529 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 18:25:11,697 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 390 flow [2023-11-22 18:25:11,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-11-22 18:25:11,698 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2023-11-22 18:25:11,698 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 390 flow [2023-11-22 18:25:11,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2023-11-22 18:25:11,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:11,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:11,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-22 18:25:11,698 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:11,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:11,699 INFO L85 PathProgramCache]: Analyzing trace with hash 147341554, now seen corresponding path program 1 times [2023-11-22 18:25:11,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:11,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175035837] [2023-11-22 18:25:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:11,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:11,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175035837] [2023-11-22 18:25:11,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175035837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177088832] [2023-11-22 18:25:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:11,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:11,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:11,793 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) [2023-11-22 18:25:11,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 18:25:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:11,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 18:25:11,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:11,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:11,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177088832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:11,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:11,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-22 18:25:11,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939786103] [2023-11-22 18:25:11,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:11,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 18:25:11,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:11,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 18:25:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:25:11,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:11,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-22 18:25:11,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:11,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:11,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:12,146 INFO L124 PetriNetUnfolderBase]: 822/1460 cut-off events. [2023-11-22 18:25:12,147 INFO L125 PetriNetUnfolderBase]: For 3564/3573 co-relation queries the response was YES. [2023-11-22 18:25:12,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5267 conditions, 1460 events. 822/1460 cut-off events. For 3564/3573 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7427 event pairs, 108 based on Foata normal form. 14/1472 useless extension candidates. Maximal degree in co-relation 5229. Up to 593 conditions per place. [2023-11-22 18:25:12,159 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 88 selfloop transitions, 20 changer transitions 2/113 dead transitions. [2023-11-22 18:25:12,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 905 flow [2023-11-22 18:25:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2023-11-22 18:25:12,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009852216748769 [2023-11-22 18:25:12,161 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 122 transitions. [2023-11-22 18:25:12,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 122 transitions. [2023-11-22 18:25:12,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:12,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 122 transitions. [2023-11-22 18:25:12,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 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) [2023-11-22 18:25:12,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:12,196 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:12,197 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 390 flow. Second operand 7 states and 122 transitions. [2023-11-22 18:25:12,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 905 flow [2023-11-22 18:25:12,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 881 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-22 18:25:12,204 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 514 flow [2023-11-22 18:25:12,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-11-22 18:25:12,205 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2023-11-22 18:25:12,205 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 514 flow [2023-11-22 18:25:12,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-22 18:25:12,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:12,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:12,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:12,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:12,422 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:12,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1164924930, now seen corresponding path program 2 times [2023-11-22 18:25:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783212001] [2023-11-22 18:25:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:12,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783212001] [2023-11-22 18:25:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783212001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8852086] [2023-11-22 18:25:12,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:25:12,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:12,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:12,533 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) [2023-11-22 18:25:12,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 18:25:12,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:25:12,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:12,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 18:25:12,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:12,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:25:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8852086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:12,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:12,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-22 18:25:12,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298095754] [2023-11-22 18:25:12,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:12,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 18:25:12,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:12,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 18:25:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:25:12,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:12,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-22 18:25:12,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:12,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:12,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:12,991 INFO L124 PetriNetUnfolderBase]: 1290/2284 cut-off events. [2023-11-22 18:25:12,991 INFO L125 PetriNetUnfolderBase]: For 6348/6357 co-relation queries the response was YES. [2023-11-22 18:25:12,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8427 conditions, 2284 events. 1290/2284 cut-off events. For 6348/6357 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12864 event pairs, 364 based on Foata normal form. 14/2295 useless extension candidates. Maximal degree in co-relation 8386. Up to 1465 conditions per place. [2023-11-22 18:25:13,009 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 98 selfloop transitions, 17 changer transitions 2/120 dead transitions. [2023-11-22 18:25:13,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 1048 flow [2023-11-22 18:25:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:25:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 18:25:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2023-11-22 18:25:13,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2023-11-22 18:25:13,010 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 118 transitions. [2023-11-22 18:25:13,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 118 transitions. [2023-11-22 18:25:13,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:13,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 118 transitions. [2023-11-22 18:25:13,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2023-11-22 18:25:13,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:13,011 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-22 18:25:13,012 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 514 flow. Second operand 7 states and 118 transitions. [2023-11-22 18:25:13,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 1048 flow [2023-11-22 18:25:13,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 120 transitions, 1019 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-22 18:25:13,029 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 630 flow [2023-11-22 18:25:13,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2023-11-22 18:25:13,030 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 56 predicate places. [2023-11-22 18:25:13,030 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 630 flow [2023-11-22 18:25:13,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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) [2023-11-22 18:25:13,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:13,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:13,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:13,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-22 18:25:13,244 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:13,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:13,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1903390278, now seen corresponding path program 3 times [2023-11-22 18:25:13,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:13,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605598436] [2023-11-22 18:25:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:13,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605598436] [2023-11-22 18:25:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605598436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708663678] [2023-11-22 18:25:13,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:25:13,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:13,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:13,332 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) [2023-11-22 18:25:13,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 18:25:13,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 18:25:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:13,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 18:25:13,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:13,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:13,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708663678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:13,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:13,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-22 18:25:13,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037035610] [2023-11-22 18:25:13,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:13,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 18:25:13,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:13,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 18:25:13,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-22 18:25:13,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:13,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 630 flow. Second operand has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:13,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:13,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:13,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:14,132 INFO L124 PetriNetUnfolderBase]: 2551/4630 cut-off events. [2023-11-22 18:25:14,133 INFO L125 PetriNetUnfolderBase]: For 14049/14058 co-relation queries the response was YES. [2023-11-22 18:25:14,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17615 conditions, 4630 events. 2551/4630 cut-off events. For 14049/14058 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30995 event pairs, 1562 based on Foata normal form. 180/4804 useless extension candidates. Maximal degree in co-relation 16580. Up to 2267 conditions per place. [2023-11-22 18:25:14,160 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 185 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2023-11-22 18:25:14,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 227 transitions, 2332 flow [2023-11-22 18:25:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 18:25:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 18:25:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 192 transitions. [2023-11-22 18:25:14,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-22 18:25:14,162 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 192 transitions. [2023-11-22 18:25:14,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 192 transitions. [2023-11-22 18:25:14,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:14,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 192 transitions. [2023-11-22 18:25:14,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.0) internal successors, (192), 16 states have internal predecessors, (192), 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) [2023-11-22 18:25:14,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:25:14,164 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:25:14,164 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 630 flow. Second operand 16 states and 192 transitions. [2023-11-22 18:25:14,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 227 transitions, 2332 flow [2023-11-22 18:25:14,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 227 transitions, 2219 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-11-22 18:25:14,210 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 1130 flow [2023-11-22 18:25:14,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1130, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2023-11-22 18:25:14,211 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 76 predicate places. [2023-11-22 18:25:14,211 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 1130 flow [2023-11-22 18:25:14,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:14,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:14,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:14,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:14,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:14,424 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:14,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:14,425 INFO L85 PathProgramCache]: Analyzing trace with hash 558959314, now seen corresponding path program 4 times [2023-11-22 18:25:14,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:14,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212747975] [2023-11-22 18:25:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:14,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:14,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:14,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212747975] [2023-11-22 18:25:14,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212747975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:14,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212068213] [2023-11-22 18:25:14,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:25:14,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:14,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:14,520 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) [2023-11-22 18:25:14,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 18:25:14,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:25:14,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:14,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 18:25:14,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:25:14,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 18:25:14,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212068213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:25:14,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 18:25:14,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2023-11-22 18:25:14,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210499912] [2023-11-22 18:25:14,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:25:14,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:25:14,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:25:14,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-22 18:25:14,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:14,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 1130 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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) [2023-11-22 18:25:14,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:14,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:14,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:15,372 INFO L124 PetriNetUnfolderBase]: 3157/5888 cut-off events. [2023-11-22 18:25:15,373 INFO L125 PetriNetUnfolderBase]: For 18401/18401 co-relation queries the response was YES. [2023-11-22 18:25:15,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21720 conditions, 5888 events. 3157/5888 cut-off events. For 18401/18401 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 43215 event pairs, 354 based on Foata normal form. 8/5890 useless extension candidates. Maximal degree in co-relation 20467. Up to 1828 conditions per place. [2023-11-22 18:25:15,405 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 110 selfloop transitions, 69 changer transitions 7/189 dead transitions. [2023-11-22 18:25:15,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1979 flow [2023-11-22 18:25:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 18:25:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-22 18:25:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2023-11-22 18:25:15,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44482758620689655 [2023-11-22 18:25:15,408 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 129 transitions. [2023-11-22 18:25:15,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 129 transitions. [2023-11-22 18:25:15,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:15,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 129 transitions. [2023-11-22 18:25:15,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:25:15,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 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) [2023-11-22 18:25:15,409 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 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) [2023-11-22 18:25:15,409 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 1130 flow. Second operand 10 states and 129 transitions. [2023-11-22 18:25:15,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1979 flow [2023-11-22 18:25:15,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 189 transitions, 1954 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-22 18:25:15,467 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1400 flow [2023-11-22 18:25:15,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1400, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2023-11-22 18:25:15,467 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 86 predicate places. [2023-11-22 18:25:15,468 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1400 flow [2023-11-22 18:25:15,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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) [2023-11-22 18:25:15,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:15,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:15,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:15,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-22 18:25:15,680 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:15,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash 432489018, now seen corresponding path program 5 times [2023-11-22 18:25:15,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:15,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559040785] [2023-11-22 18:25:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:15,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:15,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559040785] [2023-11-22 18:25:15,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559040785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836234611] [2023-11-22 18:25:15,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:25:15,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:15,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:15,752 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) [2023-11-22 18:25:15,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 18:25:15,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 18:25:15,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:15,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 18:25:15,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:15,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:15,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836234611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:15,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:15,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-22 18:25:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615889649] [2023-11-22 18:25:15,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:15,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 18:25:15,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:15,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 18:25:15,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-22 18:25:15,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:15,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1400 flow. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 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) [2023-11-22 18:25:15,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:15,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:15,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:16,436 INFO L124 PetriNetUnfolderBase]: 1849/3449 cut-off events. [2023-11-22 18:25:16,437 INFO L125 PetriNetUnfolderBase]: For 14828/14834 co-relation queries the response was YES. [2023-11-22 18:25:16,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14828 conditions, 3449 events. 1849/3449 cut-off events. For 14828/14834 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 21726 event pairs, 748 based on Foata normal form. 91/3538 useless extension candidates. Maximal degree in co-relation 14666. Up to 2301 conditions per place. [2023-11-22 18:25:16,456 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 74 selfloop transitions, 20 changer transitions 115/212 dead transitions. [2023-11-22 18:25:16,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 212 transitions, 2417 flow [2023-11-22 18:25:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:25:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 18:25:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 188 transitions. [2023-11-22 18:25:16,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432183908045977 [2023-11-22 18:25:16,458 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 188 transitions. [2023-11-22 18:25:16,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 188 transitions. [2023-11-22 18:25:16,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:16,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 188 transitions. [2023-11-22 18:25:16,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.533333333333333) internal successors, (188), 15 states have internal predecessors, (188), 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) [2023-11-22 18:25:16,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 18:25:16,461 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 18:25:16,461 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1400 flow. Second operand 15 states and 188 transitions. [2023-11-22 18:25:16,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 212 transitions, 2417 flow [2023-11-22 18:25:16,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 212 transitions, 2206 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-11-22 18:25:16,499 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 865 flow [2023-11-22 18:25:16,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=865, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2023-11-22 18:25:16,500 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2023-11-22 18:25:16,500 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 865 flow [2023-11-22 18:25:16,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 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) [2023-11-22 18:25:16,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:16,501 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:16,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:16,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-22 18:25:16,713 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:16,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash -755228349, now seen corresponding path program 6 times [2023-11-22 18:25:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932105465] [2023-11-22 18:25:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:16,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:16,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932105465] [2023-11-22 18:25:16,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932105465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:16,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921929577] [2023-11-22 18:25:16,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:25:16,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:16,900 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) [2023-11-22 18:25:16,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 18:25:17,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-22 18:25:17,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:17,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 18:25:17,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:17,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:17,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921929577] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:17,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:17,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 16 [2023-11-22 18:25:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369308525] [2023-11-22 18:25:17,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:17,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 18:25:17,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 18:25:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-22 18:25:17,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:17,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 865 flow. Second operand has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 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) [2023-11-22 18:25:17,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:17,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:17,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:17,984 INFO L124 PetriNetUnfolderBase]: 2155/3979 cut-off events. [2023-11-22 18:25:17,984 INFO L125 PetriNetUnfolderBase]: For 19413/19419 co-relation queries the response was YES. [2023-11-22 18:25:17,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17060 conditions, 3979 events. 2155/3979 cut-off events. For 19413/19419 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25799 event pairs, 272 based on Foata normal form. 180/4157 useless extension candidates. Maximal degree in co-relation 17014. Up to 620 conditions per place. [2023-11-22 18:25:18,005 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 165 selfloop transitions, 83 changer transitions 0/251 dead transitions. [2023-11-22 18:25:18,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 251 transitions, 2597 flow [2023-11-22 18:25:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 18:25:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-22 18:25:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 267 transitions. [2023-11-22 18:25:18,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603448275862069 [2023-11-22 18:25:18,007 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 267 transitions. [2023-11-22 18:25:18,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 267 transitions. [2023-11-22 18:25:18,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:18,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 267 transitions. [2023-11-22 18:25:18,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 13.35) internal successors, (267), 20 states have internal predecessors, (267), 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) [2023-11-22 18:25:18,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 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) [2023-11-22 18:25:18,009 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 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) [2023-11-22 18:25:18,009 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 865 flow. Second operand 20 states and 267 transitions. [2023-11-22 18:25:18,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 251 transitions, 2597 flow [2023-11-22 18:25:18,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 251 transitions, 2338 flow, removed 118 selfloop flow, removed 12 redundant places. [2023-11-22 18:25:18,060 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 1523 flow [2023-11-22 18:25:18,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1523, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2023-11-22 18:25:18,061 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2023-11-22 18:25:18,061 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 1523 flow [2023-11-22 18:25:18,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 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) [2023-11-22 18:25:18,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:18,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:18,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:18,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-22 18:25:18,272 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:18,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:18,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1034694599, now seen corresponding path program 7 times [2023-11-22 18:25:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:18,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492412676] [2023-11-22 18:25:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:18,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:18,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492412676] [2023-11-22 18:25:18,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492412676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:18,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354763298] [2023-11-22 18:25:18,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:25:18,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:18,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:18,441 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) [2023-11-22 18:25:18,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 18:25:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:18,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 18:25:18,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:18,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:18,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354763298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:18,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:18,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-11-22 18:25:18,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050667932] [2023-11-22 18:25:18,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:18,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:25:18,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:18,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:25:18,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-22 18:25:18,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:18,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 1523 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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) [2023-11-22 18:25:18,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:18,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:18,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:19,557 INFO L124 PetriNetUnfolderBase]: 2145/3942 cut-off events. [2023-11-22 18:25:19,557 INFO L125 PetriNetUnfolderBase]: For 26023/26029 co-relation queries the response was YES. [2023-11-22 18:25:19,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18592 conditions, 3942 events. 2145/3942 cut-off events. For 26023/26029 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25726 event pairs, 562 based on Foata normal form. 54/3994 useless extension candidates. Maximal degree in co-relation 18529. Up to 1892 conditions per place. [2023-11-22 18:25:19,586 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 145 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-11-22 18:25:19,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 181 transitions, 2349 flow [2023-11-22 18:25:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 18:25:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-22 18:25:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2023-11-22 18:25:19,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2023-11-22 18:25:19,587 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 122 transitions. [2023-11-22 18:25:19,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 122 transitions. [2023-11-22 18:25:19,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:19,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 122 transitions. [2023-11-22 18:25:19,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 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) [2023-11-22 18:25:19,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 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) [2023-11-22 18:25:19,589 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 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) [2023-11-22 18:25:19,589 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 1523 flow. Second operand 11 states and 122 transitions. [2023-11-22 18:25:19,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 181 transitions, 2349 flow [2023-11-22 18:25:19,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 2212 flow, removed 41 selfloop flow, removed 9 redundant places. [2023-11-22 18:25:19,647 INFO L231 Difference]: Finished difference. Result has 125 places, 127 transitions, 1448 flow [2023-11-22 18:25:19,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1448, PETRI_PLACES=125, PETRI_TRANSITIONS=127} [2023-11-22 18:25:19,648 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 98 predicate places. [2023-11-22 18:25:19,648 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 127 transitions, 1448 flow [2023-11-22 18:25:19,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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) [2023-11-22 18:25:19,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:19,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:19,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:19,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-22 18:25:19,860 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:19,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1043612258, now seen corresponding path program 1 times [2023-11-22 18:25:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:19,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433227290] [2023-11-22 18:25:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:20,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:20,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433227290] [2023-11-22 18:25:20,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433227290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:20,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516374294] [2023-11-22 18:25:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:20,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:20,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:20,155 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) [2023-11-22 18:25:20,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 18:25:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:20,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:25:20,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:20,369 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 18:25:20,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-22 18:25:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:20,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:20,465 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:25:20,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:25:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516374294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:20,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:20,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-22 18:25:20,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032687876] [2023-11-22 18:25:20,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:20,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 18:25:20,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 18:25:20,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:25:20,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:20,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 127 transitions, 1448 flow. Second operand has 20 states, 20 states have (on average 8.2) internal successors, (164), 20 states have internal predecessors, (164), 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) [2023-11-22 18:25:20,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:20,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:20,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:21,266 INFO L124 PetriNetUnfolderBase]: 2420/4460 cut-off events. [2023-11-22 18:25:21,266 INFO L125 PetriNetUnfolderBase]: For 31936/31942 co-relation queries the response was YES. [2023-11-22 18:25:21,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21856 conditions, 4460 events. 2420/4460 cut-off events. For 31936/31942 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29309 event pairs, 630 based on Foata normal form. 108/4566 useless extension candidates. Maximal degree in co-relation 21792. Up to 2486 conditions per place. [2023-11-22 18:25:21,297 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 192 selfloop transitions, 67 changer transitions 1/263 dead transitions. [2023-11-22 18:25:21,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 263 transitions, 3236 flow [2023-11-22 18:25:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 18:25:21,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 18:25:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 222 transitions. [2023-11-22 18:25:21,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47844827586206895 [2023-11-22 18:25:21,299 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 222 transitions. [2023-11-22 18:25:21,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 222 transitions. [2023-11-22 18:25:21,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:21,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 222 transitions. [2023-11-22 18:25:21,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.875) internal successors, (222), 16 states have internal predecessors, (222), 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) [2023-11-22 18:25:21,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:25:21,301 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:25:21,301 INFO L175 Difference]: Start difference. First operand has 125 places, 127 transitions, 1448 flow. Second operand 16 states and 222 transitions. [2023-11-22 18:25:21,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 263 transitions, 3236 flow [2023-11-22 18:25:21,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 263 transitions, 3197 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-22 18:25:21,362 INFO L231 Difference]: Finished difference. Result has 139 places, 153 transitions, 2003 flow [2023-11-22 18:25:21,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2003, PETRI_PLACES=139, PETRI_TRANSITIONS=153} [2023-11-22 18:25:21,362 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2023-11-22 18:25:21,363 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 153 transitions, 2003 flow [2023-11-22 18:25:21,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.2) internal successors, (164), 20 states have internal predecessors, (164), 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) [2023-11-22 18:25:21,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:21,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:21,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:21,575 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:21,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash 453655312, now seen corresponding path program 1 times [2023-11-22 18:25:21,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:21,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984328250] [2023-11-22 18:25:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:21,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:22,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984328250] [2023-11-22 18:25:22,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984328250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662288353] [2023-11-22 18:25:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:22,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:22,003 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) [2023-11-22 18:25:22,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 18:25:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:22,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:25:22,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:22,234 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 18:25:22,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-11-22 18:25:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:22,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:22,337 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:25:22,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:25:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:22,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662288353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:22,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:22,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2023-11-22 18:25:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909545075] [2023-11-22 18:25:22,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:22,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:25:22,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:25:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-22 18:25:22,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:22,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 153 transitions, 2003 flow. Second operand has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 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) [2023-11-22 18:25:22,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:22,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:22,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:23,213 INFO L124 PetriNetUnfolderBase]: 2456/4546 cut-off events. [2023-11-22 18:25:23,213 INFO L125 PetriNetUnfolderBase]: For 41622/41628 co-relation queries the response was YES. [2023-11-22 18:25:23,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24349 conditions, 4546 events. 2456/4546 cut-off events. For 41622/41628 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30229 event pairs, 932 based on Foata normal form. 16/4560 useless extension candidates. Maximal degree in co-relation 24279. Up to 3504 conditions per place. [2023-11-22 18:25:23,242 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 161 selfloop transitions, 34 changer transitions 38/236 dead transitions. [2023-11-22 18:25:23,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 236 transitions, 3017 flow [2023-11-22 18:25:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:25:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 18:25:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 195 transitions. [2023-11-22 18:25:23,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2023-11-22 18:25:23,244 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 195 transitions. [2023-11-22 18:25:23,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 195 transitions. [2023-11-22 18:25:23,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:23,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 195 transitions. [2023-11-22 18:25:23,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 13.0) internal successors, (195), 15 states have internal predecessors, (195), 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) [2023-11-22 18:25:23,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 18:25:23,245 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 18:25:23,245 INFO L175 Difference]: Start difference. First operand has 139 places, 153 transitions, 2003 flow. Second operand 15 states and 195 transitions. [2023-11-22 18:25:23,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 236 transitions, 3017 flow [2023-11-22 18:25:23,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 236 transitions, 2906 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-11-22 18:25:23,329 INFO L231 Difference]: Finished difference. Result has 150 places, 147 transitions, 1896 flow [2023-11-22 18:25:23,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1896, PETRI_PLACES=150, PETRI_TRANSITIONS=147} [2023-11-22 18:25:23,334 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 123 predicate places. [2023-11-22 18:25:23,335 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 147 transitions, 1896 flow [2023-11-22 18:25:23,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 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) [2023-11-22 18:25:23,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:23,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:23,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:23,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-22 18:25:23,545 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:23,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1559050236, now seen corresponding path program 2 times [2023-11-22 18:25:23,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:23,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565954183] [2023-11-22 18:25:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:23,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:23,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565954183] [2023-11-22 18:25:23,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565954183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076037870] [2023-11-22 18:25:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:25:23,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:23,816 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) [2023-11-22 18:25:23,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 18:25:23,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:25:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:23,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 18:25:23,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:24,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:24,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 18:25:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:24,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:24,252 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:25:24,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:25:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:24,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076037870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:24,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:24,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2023-11-22 18:25:24,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623404384] [2023-11-22 18:25:24,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:25:24,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:25:24,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-22 18:25:24,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:24,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 147 transitions, 1896 flow. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 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) [2023-11-22 18:25:24,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:24,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:24,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:25,379 INFO L124 PetriNetUnfolderBase]: 2538/4681 cut-off events. [2023-11-22 18:25:25,379 INFO L125 PetriNetUnfolderBase]: For 50405/50405 co-relation queries the response was YES. [2023-11-22 18:25:25,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 4681 events. 2538/4681 cut-off events. For 50405/50405 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 31403 event pairs, 857 based on Foata normal form. 24/4704 useless extension candidates. Maximal degree in co-relation 25930. Up to 3496 conditions per place. [2023-11-22 18:25:25,405 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 178 selfloop transitions, 61 changer transitions 2/244 dead transitions. [2023-11-22 18:25:25,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 244 transitions, 3268 flow [2023-11-22 18:25:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:25:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-22 18:25:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 215 transitions. [2023-11-22 18:25:25,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43610547667342797 [2023-11-22 18:25:25,411 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 215 transitions. [2023-11-22 18:25:25,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 215 transitions. [2023-11-22 18:25:25,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:25,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 215 transitions. [2023-11-22 18:25:25,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.647058823529411) internal successors, (215), 17 states have internal predecessors, (215), 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) [2023-11-22 18:25:25,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 18:25:25,416 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 18:25:25,416 INFO L175 Difference]: Start difference. First operand has 150 places, 147 transitions, 1896 flow. Second operand 17 states and 215 transitions. [2023-11-22 18:25:25,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 244 transitions, 3268 flow [2023-11-22 18:25:25,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 244 transitions, 3110 flow, removed 30 selfloop flow, removed 14 redundant places. [2023-11-22 18:25:25,508 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 2303 flow [2023-11-22 18:25:25,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2303, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2023-11-22 18:25:25,510 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 126 predicate places. [2023-11-22 18:25:25,511 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 2303 flow [2023-11-22 18:25:25,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 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) [2023-11-22 18:25:25,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:25,511 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:25,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:25,722 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,SelfDestructingSolverStorable28 [2023-11-22 18:25:25,723 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:25,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash -86514340, now seen corresponding path program 3 times [2023-11-22 18:25:25,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:25,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222217034] [2023-11-22 18:25:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:25,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:25,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222217034] [2023-11-22 18:25:25,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222217034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124601629] [2023-11-22 18:25:25,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:25:25,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:25,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:25,981 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) [2023-11-22 18:25:26,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 18:25:26,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 18:25:26,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:26,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-22 18:25:26,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:26,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-22 18:25:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:26,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 18:25:26,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:26,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 18:25:26,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:26,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 18:25:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:26,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 18:25:26,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:26,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 18:25:26,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:25:26,203 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 18:25:26,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-22 18:25:26,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 18:25:26,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 18:25:26,388 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 18:25:26,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-22 18:25:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:25:26,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:26,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:26,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2023-11-22 18:25:26,795 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-22 18:25:26,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 184 [2023-11-22 18:25:26,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 18:25:26,807 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 18:25:26,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:26,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 132 [2023-11-22 18:25:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:26,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124601629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:26,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:26,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 30 [2023-11-22 18:25:26,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840236938] [2023-11-22 18:25:26,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:26,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-22 18:25:26,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-22 18:25:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=764, Unknown=10, NotChecked=0, Total=930 [2023-11-22 18:25:26,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:26,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 2303 flow. Second operand has 31 states, 31 states have (on average 7.161290322580645) internal successors, (222), 31 states have internal predecessors, (222), 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) [2023-11-22 18:25:26,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:26,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:26,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:28,513 INFO L124 PetriNetUnfolderBase]: 2618/4831 cut-off events. [2023-11-22 18:25:28,513 INFO L125 PetriNetUnfolderBase]: For 58249/58249 co-relation queries the response was YES. [2023-11-22 18:25:28,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27891 conditions, 4831 events. 2618/4831 cut-off events. For 58249/58249 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 32642 event pairs, 1043 based on Foata normal form. 12/4842 useless extension candidates. Maximal degree in co-relation 27816. Up to 4280 conditions per place. [2023-11-22 18:25:28,547 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 183 selfloop transitions, 45 changer transitions 20/251 dead transitions. [2023-11-22 18:25:28,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 251 transitions, 3483 flow [2023-11-22 18:25:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 18:25:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-22 18:25:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 221 transitions. [2023-11-22 18:25:28,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42337164750957856 [2023-11-22 18:25:28,551 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 221 transitions. [2023-11-22 18:25:28,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 221 transitions. [2023-11-22 18:25:28,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:28,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 221 transitions. [2023-11-22 18:25:28,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 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) [2023-11-22 18:25:28,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 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) [2023-11-22 18:25:28,553 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 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) [2023-11-22 18:25:28,553 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 2303 flow. Second operand 18 states and 221 transitions. [2023-11-22 18:25:28,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 251 transitions, 3483 flow [2023-11-22 18:25:28,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 251 transitions, 3184 flow, removed 113 selfloop flow, removed 10 redundant places. [2023-11-22 18:25:28,803 INFO L231 Difference]: Finished difference. Result has 166 places, 173 transitions, 2372 flow [2023-11-22 18:25:28,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2372, PETRI_PLACES=166, PETRI_TRANSITIONS=173} [2023-11-22 18:25:28,804 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 139 predicate places. [2023-11-22 18:25:28,804 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 173 transitions, 2372 flow [2023-11-22 18:25:28,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.161290322580645) internal successors, (222), 31 states have internal predecessors, (222), 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) [2023-11-22 18:25:28,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:28,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:28,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:29,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:29,016 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:29,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:29,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2086874064, now seen corresponding path program 4 times [2023-11-22 18:25:29,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:29,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945720878] [2023-11-22 18:25:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:29,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945720878] [2023-11-22 18:25:29,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945720878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:29,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378406595] [2023-11-22 18:25:29,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:25:29,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:29,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:29,277 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) [2023-11-22 18:25:29,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 18:25:29,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:25:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:29,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-22 18:25:29,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:29,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 18:25:29,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:29,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 18:25:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:29,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:29,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:29,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 18:25:29,779 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:25:29,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 18:25:29,828 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 18:25:29,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-22 18:25:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:30,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378406595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:30,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:30,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2023-11-22 18:25:30,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326381355] [2023-11-22 18:25:30,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:30,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 18:25:30,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 18:25:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-11-22 18:25:30,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:30,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 173 transitions, 2372 flow. Second operand has 24 states, 24 states have (on average 7.416666666666667) internal successors, (178), 24 states have internal predecessors, (178), 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) [2023-11-22 18:25:30,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:30,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:30,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:31,510 INFO L124 PetriNetUnfolderBase]: 2600/4813 cut-off events. [2023-11-22 18:25:31,510 INFO L125 PetriNetUnfolderBase]: For 57978/57978 co-relation queries the response was YES. [2023-11-22 18:25:31,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27555 conditions, 4813 events. 2600/4813 cut-off events. For 57978/57978 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 32703 event pairs, 1005 based on Foata normal form. 18/4830 useless extension candidates. Maximal degree in co-relation 27473. Up to 4142 conditions per place. [2023-11-22 18:25:31,546 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 193 selfloop transitions, 58 changer transitions 19/273 dead transitions. [2023-11-22 18:25:31,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 273 transitions, 3615 flow [2023-11-22 18:25:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 18:25:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-22 18:25:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 273 transitions. [2023-11-22 18:25:31,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40929535232383807 [2023-11-22 18:25:31,548 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 273 transitions. [2023-11-22 18:25:31,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 273 transitions. [2023-11-22 18:25:31,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:31,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 273 transitions. [2023-11-22 18:25:31,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 11.869565217391305) internal successors, (273), 23 states have internal predecessors, (273), 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) [2023-11-22 18:25:31,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 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) [2023-11-22 18:25:31,549 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 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) [2023-11-22 18:25:31,549 INFO L175 Difference]: Start difference. First operand has 166 places, 173 transitions, 2372 flow. Second operand 23 states and 273 transitions. [2023-11-22 18:25:31,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 273 transitions, 3615 flow [2023-11-22 18:25:31,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 273 transitions, 3481 flow, removed 34 selfloop flow, removed 13 redundant places. [2023-11-22 18:25:31,689 INFO L231 Difference]: Finished difference. Result has 175 places, 179 transitions, 2511 flow [2023-11-22 18:25:31,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2511, PETRI_PLACES=175, PETRI_TRANSITIONS=179} [2023-11-22 18:25:31,690 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 148 predicate places. [2023-11-22 18:25:31,690 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 179 transitions, 2511 flow [2023-11-22 18:25:31,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.416666666666667) internal successors, (178), 24 states have internal predecessors, (178), 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) [2023-11-22 18:25:31,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:31,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:31,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:31,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:31,902 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:31,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1195368334, now seen corresponding path program 2 times [2023-11-22 18:25:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039087999] [2023-11-22 18:25:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:31,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039087999] [2023-11-22 18:25:32,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039087999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501389695] [2023-11-22 18:25:32,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:25:32,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:32,128 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) [2023-11-22 18:25:32,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 18:25:32,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:25:32,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:32,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 18:25:32,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:32,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:32,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 18:25:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:32,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:32,478 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:25:32,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:25:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:32,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501389695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:32,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:32,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 17 [2023-11-22 18:25:32,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445509529] [2023-11-22 18:25:32,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:32,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 18:25:32,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 18:25:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-22 18:25:32,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:32,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 179 transitions, 2511 flow. Second operand has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 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) [2023-11-22 18:25:32,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:32,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:32,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:33,634 INFO L124 PetriNetUnfolderBase]: 2910/5390 cut-off events. [2023-11-22 18:25:33,634 INFO L125 PetriNetUnfolderBase]: For 69129/69129 co-relation queries the response was YES. [2023-11-22 18:25:33,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31478 conditions, 5390 events. 2910/5390 cut-off events. For 69129/69129 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 37112 event pairs, 931 based on Foata normal form. 16/5405 useless extension candidates. Maximal degree in co-relation 31397. Up to 3814 conditions per place. [2023-11-22 18:25:33,673 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 208 selfloop transitions, 103 changer transitions 12/326 dead transitions. [2023-11-22 18:25:33,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 326 transitions, 4589 flow [2023-11-22 18:25:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-22 18:25:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-22 18:25:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 302 transitions. [2023-11-22 18:25:33,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38569604086845466 [2023-11-22 18:25:33,675 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 302 transitions. [2023-11-22 18:25:33,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 302 transitions. [2023-11-22 18:25:33,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:33,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 302 transitions. [2023-11-22 18:25:33,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 11.185185185185185) internal successors, (302), 27 states have internal predecessors, (302), 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) [2023-11-22 18:25:33,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 29.0) internal successors, (812), 28 states have internal predecessors, (812), 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) [2023-11-22 18:25:33,693 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 29.0) internal successors, (812), 28 states have internal predecessors, (812), 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) [2023-11-22 18:25:33,694 INFO L175 Difference]: Start difference. First operand has 175 places, 179 transitions, 2511 flow. Second operand 27 states and 302 transitions. [2023-11-22 18:25:33,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 326 transitions, 4589 flow [2023-11-22 18:25:34,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 326 transitions, 4457 flow, removed 26 selfloop flow, removed 15 redundant places. [2023-11-22 18:25:34,020 INFO L231 Difference]: Finished difference. Result has 188 places, 218 transitions, 3418 flow [2023-11-22 18:25:34,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3418, PETRI_PLACES=188, PETRI_TRANSITIONS=218} [2023-11-22 18:25:34,021 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 161 predicate places. [2023-11-22 18:25:34,021 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 218 transitions, 3418 flow [2023-11-22 18:25:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 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) [2023-11-22 18:25:34,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:34,021 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:34,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:34,234 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:34,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:34,235 INFO L85 PathProgramCache]: Analyzing trace with hash 11832812, now seen corresponding path program 3 times [2023-11-22 18:25:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:34,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573965821] [2023-11-22 18:25:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:34,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:34,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573965821] [2023-11-22 18:25:34,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573965821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47535506] [2023-11-22 18:25:34,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:25:34,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:34,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:34,529 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) [2023-11-22 18:25:34,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 18:25:34,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 18:25:34,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:34,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-22 18:25:34,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:34,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:34,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 18:25:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:34,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:34,903 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:25:34,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:25:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:34,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47535506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:34,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:34,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2023-11-22 18:25:34,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591583127] [2023-11-22 18:25:34,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:34,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:25:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:25:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-22 18:25:34,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:34,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 218 transitions, 3418 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 18:25:34,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:34,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:34,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:36,629 INFO L124 PetriNetUnfolderBase]: 2980/5524 cut-off events. [2023-11-22 18:25:36,629 INFO L125 PetriNetUnfolderBase]: For 86876/86876 co-relation queries the response was YES. [2023-11-22 18:25:36,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34113 conditions, 5524 events. 2980/5524 cut-off events. For 86876/86876 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 38311 event pairs, 931 based on Foata normal form. 80/5603 useless extension candidates. Maximal degree in co-relation 34026. Up to 3822 conditions per place. [2023-11-22 18:25:36,675 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 228 selfloop transitions, 118 changer transitions 6/355 dead transitions. [2023-11-22 18:25:36,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 355 transitions, 5237 flow [2023-11-22 18:25:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-22 18:25:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-22 18:25:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 360 transitions. [2023-11-22 18:25:36,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2023-11-22 18:25:36,677 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 360 transitions. [2023-11-22 18:25:36,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 360 transitions. [2023-11-22 18:25:36,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:36,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 360 transitions. [2023-11-22 18:25:36,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 11.25) internal successors, (360), 32 states have internal predecessors, (360), 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) [2023-11-22 18:25:36,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 29.0) internal successors, (957), 33 states have internal predecessors, (957), 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) [2023-11-22 18:25:36,680 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 29.0) internal successors, (957), 33 states have internal predecessors, (957), 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) [2023-11-22 18:25:36,680 INFO L175 Difference]: Start difference. First operand has 188 places, 218 transitions, 3418 flow. Second operand 32 states and 360 transitions. [2023-11-22 18:25:36,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 355 transitions, 5237 flow [2023-11-22 18:25:36,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 355 transitions, 4927 flow, removed 96 selfloop flow, removed 16 redundant places. [2023-11-22 18:25:36,895 INFO L231 Difference]: Finished difference. Result has 205 places, 232 transitions, 3662 flow [2023-11-22 18:25:36,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3662, PETRI_PLACES=205, PETRI_TRANSITIONS=232} [2023-11-22 18:25:36,895 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 178 predicate places. [2023-11-22 18:25:36,895 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 232 transitions, 3662 flow [2023-11-22 18:25:36,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 18:25:36,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:36,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:36,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:37,107 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,SelfDestructingSolverStorable32 [2023-11-22 18:25:37,108 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:37,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash 946416602, now seen corresponding path program 4 times [2023-11-22 18:25:37,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:37,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541300460] [2023-11-22 18:25:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:37,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541300460] [2023-11-22 18:25:37,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541300460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157839096] [2023-11-22 18:25:37,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:25:37,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:37,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:37,373 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) [2023-11-22 18:25:37,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 18:25:37,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:25:37,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:37,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 18:25:37,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:37,602 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 18:25:37,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-22 18:25:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:37,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:37,711 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:25:37,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:25:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157839096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:37,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:37,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-22 18:25:37,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880479311] [2023-11-22 18:25:37,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:37,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 18:25:37,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 18:25:37,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:25:37,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:37,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 232 transitions, 3662 flow. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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) [2023-11-22 18:25:37,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:37,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:37,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:39,356 INFO L124 PetriNetUnfolderBase]: 3105/5705 cut-off events. [2023-11-22 18:25:39,357 INFO L125 PetriNetUnfolderBase]: For 111021/111021 co-relation queries the response was YES. [2023-11-22 18:25:39,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36574 conditions, 5705 events. 3105/5705 cut-off events. For 111021/111021 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 39547 event pairs, 657 based on Foata normal form. 174/5878 useless extension candidates. Maximal degree in co-relation 36484. Up to 3344 conditions per place. [2023-11-22 18:25:39,403 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 245 selfloop transitions, 155 changer transitions 6/409 dead transitions. [2023-11-22 18:25:39,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 409 transitions, 6340 flow [2023-11-22 18:25:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-22 18:25:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-22 18:25:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 375 transitions. [2023-11-22 18:25:39,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-11-22 18:25:39,405 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 375 transitions. [2023-11-22 18:25:39,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 375 transitions. [2023-11-22 18:25:39,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:39,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 375 transitions. [2023-11-22 18:25:39,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 12.5) internal successors, (375), 30 states have internal predecessors, (375), 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) [2023-11-22 18:25:39,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 29.0) internal successors, (899), 31 states have internal predecessors, (899), 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) [2023-11-22 18:25:39,407 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 29.0) internal successors, (899), 31 states have internal predecessors, (899), 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) [2023-11-22 18:25:39,407 INFO L175 Difference]: Start difference. First operand has 205 places, 232 transitions, 3662 flow. Second operand 30 states and 375 transitions. [2023-11-22 18:25:39,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 409 transitions, 6340 flow [2023-11-22 18:25:39,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 409 transitions, 6031 flow, removed 24 selfloop flow, removed 23 redundant places. [2023-11-22 18:25:39,644 INFO L231 Difference]: Finished difference. Result has 216 places, 275 transitions, 4603 flow [2023-11-22 18:25:39,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4603, PETRI_PLACES=216, PETRI_TRANSITIONS=275} [2023-11-22 18:25:39,644 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 189 predicate places. [2023-11-22 18:25:39,645 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 275 transitions, 4603 flow [2023-11-22 18:25:39,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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) [2023-11-22 18:25:39,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:39,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:39,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:39,856 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,SelfDestructingSolverStorable33 [2023-11-22 18:25:39,856 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:39,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash 887066238, now seen corresponding path program 5 times [2023-11-22 18:25:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:39,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549813343] [2023-11-22 18:25:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:39,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:40,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:40,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549813343] [2023-11-22 18:25:40,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549813343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:40,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906852257] [2023-11-22 18:25:40,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:25:40,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:40,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:40,125 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) [2023-11-22 18:25:40,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 18:25:40,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 18:25:40,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:40,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:25:40,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:40,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:40,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 18:25:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:40,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:40,407 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:40,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906852257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:40,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:40,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 18:25:40,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77911766] [2023-11-22 18:25:40,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:40,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 18:25:40,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 18:25:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-22 18:25:40,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:40,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 275 transitions, 4603 flow. Second operand has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 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) [2023-11-22 18:25:40,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:40,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:40,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:41,860 INFO L124 PetriNetUnfolderBase]: 3262/6013 cut-off events. [2023-11-22 18:25:41,861 INFO L125 PetriNetUnfolderBase]: For 142662/142665 co-relation queries the response was YES. [2023-11-22 18:25:41,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40642 conditions, 6013 events. 3262/6013 cut-off events. For 142662/142665 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42214 event pairs, 1017 based on Foata normal form. 14/6025 useless extension candidates. Maximal degree in co-relation 40546. Up to 4657 conditions per place. [2023-11-22 18:25:41,914 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 256 selfloop transitions, 107 changer transitions 15/381 dead transitions. [2023-11-22 18:25:41,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 381 transitions, 6472 flow [2023-11-22 18:25:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-22 18:25:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-22 18:25:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 247 transitions. [2023-11-22 18:25:41,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42586206896551726 [2023-11-22 18:25:41,916 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 247 transitions. [2023-11-22 18:25:41,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 247 transitions. [2023-11-22 18:25:41,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:41,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 247 transitions. [2023-11-22 18:25:41,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.35) internal successors, (247), 20 states have internal predecessors, (247), 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) [2023-11-22 18:25:41,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 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) [2023-11-22 18:25:41,918 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 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) [2023-11-22 18:25:41,918 INFO L175 Difference]: Start difference. First operand has 216 places, 275 transitions, 4603 flow. Second operand 20 states and 247 transitions. [2023-11-22 18:25:41,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 381 transitions, 6472 flow [2023-11-22 18:25:42,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 381 transitions, 6072 flow, removed 118 selfloop flow, removed 15 redundant places. [2023-11-22 18:25:42,392 INFO L231 Difference]: Finished difference. Result has 227 places, 305 transitions, 5234 flow [2023-11-22 18:25:42,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5234, PETRI_PLACES=227, PETRI_TRANSITIONS=305} [2023-11-22 18:25:42,393 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 200 predicate places. [2023-11-22 18:25:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 305 transitions, 5234 flow [2023-11-22 18:25:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 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) [2023-11-22 18:25:42,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:42,393 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:42,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:42,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:42,605 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:42,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash 649670272, now seen corresponding path program 5 times [2023-11-22 18:25:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517898597] [2023-11-22 18:25:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:42,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:42,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517898597] [2023-11-22 18:25:42,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517898597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:42,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598787159] [2023-11-22 18:25:42,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:25:42,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:42,869 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) [2023-11-22 18:25:42,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 18:25:43,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 18:25:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:43,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:25:43,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:43,090 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 18:25:43,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-11-22 18:25:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:43,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:43,162 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:43,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:43,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598787159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:43,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:43,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 18:25:43,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24290988] [2023-11-22 18:25:43,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:43,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 18:25:43,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 18:25:43,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-22 18:25:43,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:43,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 305 transitions, 5234 flow. Second operand has 18 states, 18 states have (on average 8.0) internal successors, (144), 18 states have internal predecessors, (144), 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) [2023-11-22 18:25:43,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:43,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:43,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:44,521 INFO L124 PetriNetUnfolderBase]: 3254/6001 cut-off events. [2023-11-22 18:25:44,521 INFO L125 PetriNetUnfolderBase]: For 131742/131745 co-relation queries the response was YES. [2023-11-22 18:25:44,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40184 conditions, 6001 events. 3254/6001 cut-off events. For 131742/131745 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42164 event pairs, 1081 based on Foata normal form. 10/6009 useless extension candidates. Maximal degree in co-relation 40084. Up to 4986 conditions per place. [2023-11-22 18:25:44,575 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 258 selfloop transitions, 83 changer transitions 22/366 dead transitions. [2023-11-22 18:25:44,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 366 transitions, 6297 flow [2023-11-22 18:25:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:25:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 18:25:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 194 transitions. [2023-11-22 18:25:44,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459770114942529 [2023-11-22 18:25:44,577 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 194 transitions. [2023-11-22 18:25:44,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 194 transitions. [2023-11-22 18:25:44,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:44,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 194 transitions. [2023-11-22 18:25:44,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.933333333333334) internal successors, (194), 15 states have internal predecessors, (194), 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) [2023-11-22 18:25:44,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 18:25:44,582 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 18:25:44,582 INFO L175 Difference]: Start difference. First operand has 227 places, 305 transitions, 5234 flow. Second operand 15 states and 194 transitions. [2023-11-22 18:25:44,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 366 transitions, 6297 flow [2023-11-22 18:25:45,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 366 transitions, 5936 flow, removed 145 selfloop flow, removed 9 redundant places. [2023-11-22 18:25:45,097 INFO L231 Difference]: Finished difference. Result has 233 places, 304 transitions, 5057 flow [2023-11-22 18:25:45,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4874, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5057, PETRI_PLACES=233, PETRI_TRANSITIONS=304} [2023-11-22 18:25:45,098 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 206 predicate places. [2023-11-22 18:25:45,098 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 304 transitions, 5057 flow [2023-11-22 18:25:45,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.0) internal successors, (144), 18 states have internal predecessors, (144), 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) [2023-11-22 18:25:45,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:45,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:45,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:45,308 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:45,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 600291190, now seen corresponding path program 6 times [2023-11-22 18:25:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:45,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886618632] [2023-11-22 18:25:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886618632] [2023-11-22 18:25:45,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886618632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407884722] [2023-11-22 18:25:45,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:25:45,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:45,681 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) [2023-11-22 18:25:45,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 18:25:45,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-22 18:25:45,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:45,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 18:25:45,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:45,974 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 18:25:45,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-22 18:25:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:45,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:46,044 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:46,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:25:46,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407884722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:46,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:46,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 20 [2023-11-22 18:25:46,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768683773] [2023-11-22 18:25:46,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:46,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:25:46,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:46,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:25:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-22 18:25:46,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:46,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 304 transitions, 5057 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 18:25:46,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:46,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:46,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:47,317 INFO L124 PetriNetUnfolderBase]: 3168/5831 cut-off events. [2023-11-22 18:25:47,317 INFO L125 PetriNetUnfolderBase]: For 88593/88593 co-relation queries the response was YES. [2023-11-22 18:25:47,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36929 conditions, 5831 events. 3168/5831 cut-off events. For 88593/88593 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 40592 event pairs, 999 based on Foata normal form. 12/5842 useless extension candidates. Maximal degree in co-relation 36828. Up to 4874 conditions per place. [2023-11-22 18:25:47,365 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 257 selfloop transitions, 82 changer transitions 21/363 dead transitions. [2023-11-22 18:25:47,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 363 transitions, 6118 flow [2023-11-22 18:25:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 18:25:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 18:25:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 195 transitions. [2023-11-22 18:25:47,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202586206896552 [2023-11-22 18:25:47,366 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 195 transitions. [2023-11-22 18:25:47,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 195 transitions. [2023-11-22 18:25:47,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:47,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 195 transitions. [2023-11-22 18:25:47,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.1875) internal successors, (195), 16 states have internal predecessors, (195), 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) [2023-11-22 18:25:47,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:25:47,368 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:25:47,368 INFO L175 Difference]: Start difference. First operand has 233 places, 304 transitions, 5057 flow. Second operand 16 states and 195 transitions. [2023-11-22 18:25:47,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 363 transitions, 6118 flow [2023-11-22 18:25:47,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 363 transitions, 5869 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-11-22 18:25:47,626 INFO L231 Difference]: Finished difference. Result has 234 places, 307 transitions, 5093 flow [2023-11-22 18:25:47,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5093, PETRI_PLACES=234, PETRI_TRANSITIONS=307} [2023-11-22 18:25:47,626 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 207 predicate places. [2023-11-22 18:25:47,626 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 307 transitions, 5093 flow [2023-11-22 18:25:47,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 18:25:47,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:47,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:47,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-22 18:25:47,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-22 18:25:47,837 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:47,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1823859010, now seen corresponding path program 7 times [2023-11-22 18:25:47,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:47,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951583755] [2023-11-22 18:25:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:47,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:48,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951583755] [2023-11-22 18:25:48,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951583755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161858912] [2023-11-22 18:25:48,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:25:48,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:48,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:48,042 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) [2023-11-22 18:25:48,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 18:25:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:48,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:25:48,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:48,255 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-22 18:25:48,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-22 18:25:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:48,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:48,329 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:48,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:48,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161858912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:48,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:48,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2023-11-22 18:25:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673754066] [2023-11-22 18:25:48,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:48,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:25:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:25:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-22 18:25:48,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:48,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 307 transitions, 5093 flow. Second operand has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 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) [2023-11-22 18:25:48,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:48,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:48,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:49,841 INFO L124 PetriNetUnfolderBase]: 3452/6332 cut-off events. [2023-11-22 18:25:49,841 INFO L125 PetriNetUnfolderBase]: For 98537/98540 co-relation queries the response was YES. [2023-11-22 18:25:49,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40274 conditions, 6332 events. 3452/6332 cut-off events. For 98537/98540 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 44723 event pairs, 943 based on Foata normal form. 38/6368 useless extension candidates. Maximal degree in co-relation 40174. Up to 4321 conditions per place. [2023-11-22 18:25:49,898 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 278 selfloop transitions, 119 changer transitions 1/401 dead transitions. [2023-11-22 18:25:49,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 401 transitions, 6846 flow [2023-11-22 18:25:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 18:25:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 18:25:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 212 transitions. [2023-11-22 18:25:49,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2023-11-22 18:25:49,900 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 212 transitions. [2023-11-22 18:25:49,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 212 transitions. [2023-11-22 18:25:49,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:49,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 212 transitions. [2023-11-22 18:25:49,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.25) internal successors, (212), 16 states have internal predecessors, (212), 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) [2023-11-22 18:25:49,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:25:49,901 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:25:49,902 INFO L175 Difference]: Start difference. First operand has 234 places, 307 transitions, 5093 flow. Second operand 16 states and 212 transitions. [2023-11-22 18:25:49,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 401 transitions, 6846 flow [2023-11-22 18:25:50,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 401 transitions, 6686 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-11-22 18:25:50,224 INFO L231 Difference]: Finished difference. Result has 238 places, 315 transitions, 5406 flow [2023-11-22 18:25:50,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4939, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5406, PETRI_PLACES=238, PETRI_TRANSITIONS=315} [2023-11-22 18:25:50,225 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 211 predicate places. [2023-11-22 18:25:50,225 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 315 transitions, 5406 flow [2023-11-22 18:25:50,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 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) [2023-11-22 18:25:50,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:50,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:50,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-22 18:25:50,436 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,SelfDestructingSolverStorable37 [2023-11-22 18:25:50,436 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:50,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2126258226, now seen corresponding path program 6 times [2023-11-22 18:25:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:50,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184493935] [2023-11-22 18:25:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:50,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:50,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184493935] [2023-11-22 18:25:50,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184493935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:50,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225956971] [2023-11-22 18:25:50,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:25:50,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:50,897 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) [2023-11-22 18:25:50,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 18:25:51,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-22 18:25:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:51,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-22 18:25:51,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:51,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-22 18:25:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:51,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 18:25:51,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:51,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 18:25:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:51,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 18:25:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:51,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 18:25:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:25:51,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 18:25:51,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:25:51,147 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 18:25:51,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-22 18:25:51,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 18:25:51,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 18:25:51,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:51,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 18:25:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:25:51,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:51,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:51,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2023-11-22 18:25:51,688 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-22 18:25:51,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 184 [2023-11-22 18:25:51,698 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 18:25:51,698 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-22 18:25:51,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:51,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 132 [2023-11-22 18:25:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:25:51,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225956971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:51,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:51,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 30 [2023-11-22 18:25:51,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890419188] [2023-11-22 18:25:51,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:51,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-22 18:25:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-22 18:25:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=747, Unknown=9, NotChecked=0, Total=930 [2023-11-22 18:25:51,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:51,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 315 transitions, 5406 flow. Second operand has 31 states, 31 states have (on average 7.0) internal successors, (217), 31 states have internal predecessors, (217), 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) [2023-11-22 18:25:51,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:51,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:51,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:54,108 INFO L124 PetriNetUnfolderBase]: 3758/6930 cut-off events. [2023-11-22 18:25:54,108 INFO L125 PetriNetUnfolderBase]: For 116002/116005 co-relation queries the response was YES. [2023-11-22 18:25:54,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44945 conditions, 6930 events. 3758/6930 cut-off events. For 116002/116005 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 49466 event pairs, 1165 based on Foata normal form. 26/6954 useless extension candidates. Maximal degree in co-relation 44844. Up to 5756 conditions per place. [2023-11-22 18:25:54,170 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 335 selfloop transitions, 100 changer transitions 8/446 dead transitions. [2023-11-22 18:25:54,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 446 transitions, 7590 flow [2023-11-22 18:25:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 18:25:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-22 18:25:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 291 transitions. [2023-11-22 18:25:54,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013793103448276 [2023-11-22 18:25:54,171 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 291 transitions. [2023-11-22 18:25:54,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 291 transitions. [2023-11-22 18:25:54,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:54,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 291 transitions. [2023-11-22 18:25:54,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 11.64) internal successors, (291), 25 states have internal predecessors, (291), 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) [2023-11-22 18:25:54,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 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) [2023-11-22 18:25:54,174 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 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) [2023-11-22 18:25:54,174 INFO L175 Difference]: Start difference. First operand has 238 places, 315 transitions, 5406 flow. Second operand 25 states and 291 transitions. [2023-11-22 18:25:54,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 446 transitions, 7590 flow [2023-11-22 18:25:54,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 446 transitions, 7391 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-11-22 18:25:54,569 INFO L231 Difference]: Finished difference. Result has 259 places, 349 transitions, 6246 flow [2023-11-22 18:25:54,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6246, PETRI_PLACES=259, PETRI_TRANSITIONS=349} [2023-11-22 18:25:54,570 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 232 predicate places. [2023-11-22 18:25:54,570 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 349 transitions, 6246 flow [2023-11-22 18:25:54,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.0) internal successors, (217), 31 states have internal predecessors, (217), 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) [2023-11-22 18:25:54,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:54,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:54,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-22 18:25:54,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-22 18:25:54,781 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:54,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2030239526, now seen corresponding path program 8 times [2023-11-22 18:25:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:54,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291458238] [2023-11-22 18:25:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:54,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291458238] [2023-11-22 18:25:54,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291458238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981081120] [2023-11-22 18:25:54,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:25:54,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:54,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:54,993 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:25:55,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 18:25:55,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:25:55,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:25:55,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-22 18:25:55,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:55,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:25:55,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:55,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 18:25:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:25:55,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:55,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:55,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 18:25:55,415 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:25:55,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 18:25:55,472 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 18:25:55,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 203 [2023-11-22 18:25:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:25:55,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981081120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:55,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:55,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 20 [2023-11-22 18:25:55,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087542783] [2023-11-22 18:25:55,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:55,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:25:55,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:55,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:25:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-11-22 18:25:55,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:55,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 349 transitions, 6246 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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) [2023-11-22 18:25:55,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:55,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:55,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:57,273 INFO L124 PetriNetUnfolderBase]: 3800/7000 cut-off events. [2023-11-22 18:25:57,274 INFO L125 PetriNetUnfolderBase]: For 124563/124566 co-relation queries the response was YES. [2023-11-22 18:25:57,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46557 conditions, 7000 events. 3800/7000 cut-off events. For 124563/124566 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 49660 event pairs, 1241 based on Foata normal form. 38/7036 useless extension candidates. Maximal degree in co-relation 46447. Up to 6151 conditions per place. [2023-11-22 18:25:57,342 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 317 selfloop transitions, 102 changer transitions 1/423 dead transitions. [2023-11-22 18:25:57,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 423 transitions, 7718 flow [2023-11-22 18:25:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 18:25:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-22 18:25:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 231 transitions. [2023-11-22 18:25:57,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2023-11-22 18:25:57,343 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 231 transitions. [2023-11-22 18:25:57,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 231 transitions. [2023-11-22 18:25:57,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:57,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 231 transitions. [2023-11-22 18:25:57,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.0) internal successors, (231), 21 states have internal predecessors, (231), 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) [2023-11-22 18:25:57,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 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) [2023-11-22 18:25:57,345 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 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) [2023-11-22 18:25:57,345 INFO L175 Difference]: Start difference. First operand has 259 places, 349 transitions, 6246 flow. Second operand 21 states and 231 transitions. [2023-11-22 18:25:57,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 423 transitions, 7718 flow [2023-11-22 18:25:57,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 423 transitions, 7555 flow, removed 63 selfloop flow, removed 9 redundant places. [2023-11-22 18:25:57,798 INFO L231 Difference]: Finished difference. Result has 271 places, 361 transitions, 6559 flow [2023-11-22 18:25:57,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6559, PETRI_PLACES=271, PETRI_TRANSITIONS=361} [2023-11-22 18:25:57,799 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 244 predicate places. [2023-11-22 18:25:57,799 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 361 transitions, 6559 flow [2023-11-22 18:25:57,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 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) [2023-11-22 18:25:57,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:25:57,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:25:57,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-22 18:25:58,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-22 18:25:58,010 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:25:58,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:25:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash 504047724, now seen corresponding path program 7 times [2023-11-22 18:25:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:25:58,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14553255] [2023-11-22 18:25:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:25:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:25:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:25:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14553255] [2023-11-22 18:25:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14553255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:25:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336437099] [2023-11-22 18:25:58,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:25:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:25:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:25:58,224 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:25:58,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 18:25:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:25:58,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:25:58,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:25:58,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:25:58,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 18:25:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:58,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:25:58,489 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:25:58,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:25:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:25:58,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336437099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:25:58,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:25:58,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 16 [2023-11-22 18:25:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837336363] [2023-11-22 18:25:58,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:25:58,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 18:25:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:25:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 18:25:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-22 18:25:58,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:25:58,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 361 transitions, 6559 flow. Second operand has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 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) [2023-11-22 18:25:58,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:25:58,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:25:58,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:25:59,920 INFO L124 PetriNetUnfolderBase]: 3468/6386 cut-off events. [2023-11-22 18:25:59,920 INFO L125 PetriNetUnfolderBase]: For 116529/116532 co-relation queries the response was YES. [2023-11-22 18:25:59,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43155 conditions, 6386 events. 3468/6386 cut-off events. For 116529/116532 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 44317 event pairs, 1023 based on Foata normal form. 122/6506 useless extension candidates. Maximal degree in co-relation 43041. Up to 5259 conditions per place. [2023-11-22 18:25:59,975 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 289 selfloop transitions, 115 changer transitions 3/410 dead transitions. [2023-11-22 18:25:59,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 410 transitions, 7615 flow [2023-11-22 18:25:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:25:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-22 18:25:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 208 transitions. [2023-11-22 18:25:59,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42190669371196754 [2023-11-22 18:25:59,976 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 208 transitions. [2023-11-22 18:25:59,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 208 transitions. [2023-11-22 18:25:59,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:25:59,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 208 transitions. [2023-11-22 18:25:59,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.235294117647058) internal successors, (208), 17 states have internal predecessors, (208), 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) [2023-11-22 18:25:59,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 18:25:59,978 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 18:25:59,978 INFO L175 Difference]: Start difference. First operand has 271 places, 361 transitions, 6559 flow. Second operand 17 states and 208 transitions. [2023-11-22 18:25:59,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 410 transitions, 7615 flow [2023-11-22 18:26:00,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 410 transitions, 7373 flow, removed 21 selfloop flow, removed 22 redundant places. [2023-11-22 18:26:00,371 INFO L231 Difference]: Finished difference. Result has 264 places, 349 transitions, 6422 flow [2023-11-22 18:26:00,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6181, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6422, PETRI_PLACES=264, PETRI_TRANSITIONS=349} [2023-11-22 18:26:00,372 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 237 predicate places. [2023-11-22 18:26:00,372 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 349 transitions, 6422 flow [2023-11-22 18:26:00,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 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) [2023-11-22 18:26:00,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:00,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:00,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-22 18:26:00,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:00,583 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:00,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1952361928, now seen corresponding path program 9 times [2023-11-22 18:26:00,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:00,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067796783] [2023-11-22 18:26:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:00,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:00,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:00,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067796783] [2023-11-22 18:26:00,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067796783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:00,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629089429] [2023-11-22 18:26:00,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:26:00,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:00,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:00,821 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:00,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 18:26:00,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 18:26:00,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:00,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-22 18:26:00,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:01,174 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:26:01,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 18:26:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:26:01,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:01,257 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:26:01,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:26:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:01,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629089429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:01,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:01,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 22 [2023-11-22 18:26:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760063345] [2023-11-22 18:26:01,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 18:26:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 18:26:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-22 18:26:01,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:01,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 349 transitions, 6422 flow. Second operand has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 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) [2023-11-22 18:26:01,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:01,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:01,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:02,808 INFO L124 PetriNetUnfolderBase]: 3836/7078 cut-off events. [2023-11-22 18:26:02,808 INFO L125 PetriNetUnfolderBase]: For 126738/126741 co-relation queries the response was YES. [2023-11-22 18:26:02,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47771 conditions, 7078 events. 3836/7078 cut-off events. For 126738/126741 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 50264 event pairs, 966 based on Foata normal form. 26/7102 useless extension candidates. Maximal degree in co-relation 47664. Up to 5098 conditions per place. [2023-11-22 18:26:02,874 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 421 selfloop transitions, 56 changer transitions 1/481 dead transitions. [2023-11-22 18:26:02,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 481 transitions, 9075 flow [2023-11-22 18:26:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 18:26:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-22 18:26:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 229 transitions. [2023-11-22 18:26:02,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386973180076628 [2023-11-22 18:26:02,876 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 229 transitions. [2023-11-22 18:26:02,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 229 transitions. [2023-11-22 18:26:02,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:02,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 229 transitions. [2023-11-22 18:26:02,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 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) [2023-11-22 18:26:02,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 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) [2023-11-22 18:26:02,877 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 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) [2023-11-22 18:26:02,877 INFO L175 Difference]: Start difference. First operand has 264 places, 349 transitions, 6422 flow. Second operand 18 states and 229 transitions. [2023-11-22 18:26:02,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 481 transitions, 9075 flow [2023-11-22 18:26:03,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 481 transitions, 8890 flow, removed 3 selfloop flow, removed 14 redundant places. [2023-11-22 18:26:03,445 INFO L231 Difference]: Finished difference. Result has 273 places, 365 transitions, 6716 flow [2023-11-22 18:26:03,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6237, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6716, PETRI_PLACES=273, PETRI_TRANSITIONS=365} [2023-11-22 18:26:03,446 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 246 predicate places. [2023-11-22 18:26:03,446 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 365 transitions, 6716 flow [2023-11-22 18:26:03,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 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) [2023-11-22 18:26:03,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:03,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:03,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-22 18:26:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:03,658 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:03,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1700565130, now seen corresponding path program 8 times [2023-11-22 18:26:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:03,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121157648] [2023-11-22 18:26:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:03,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:03,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121157648] [2023-11-22 18:26:03,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121157648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:03,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890829251] [2023-11-22 18:26:03,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:26:03,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:03,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:03,853 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:03,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-22 18:26:04,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:26:04,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:04,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 18:26:04,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:04,138 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 18:26:04,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-22 18:26:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:26:04,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:04,219 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:26:04,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:26:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:04,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890829251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:04,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:04,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 18 [2023-11-22 18:26:04,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613323129] [2023-11-22 18:26:04,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:26:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:26:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-22 18:26:04,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:04,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 365 transitions, 6716 flow. Second operand has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 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) [2023-11-22 18:26:04,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:04,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:04,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:05,759 INFO L124 PetriNetUnfolderBase]: 3874/7171 cut-off events. [2023-11-22 18:26:05,759 INFO L125 PetriNetUnfolderBase]: For 143860/143863 co-relation queries the response was YES. [2023-11-22 18:26:05,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49572 conditions, 7171 events. 3874/7171 cut-off events. For 143860/143863 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 51345 event pairs, 1140 based on Foata normal form. 10/7179 useless extension candidates. Maximal degree in co-relation 49456. Up to 6084 conditions per place. [2023-11-22 18:26:05,831 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 371 selfloop transitions, 40 changer transitions 32/446 dead transitions. [2023-11-22 18:26:05,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 446 transitions, 8413 flow [2023-11-22 18:26:05,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 18:26:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-22 18:26:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 196 transitions. [2023-11-22 18:26:05,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2023-11-22 18:26:05,832 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 196 transitions. [2023-11-22 18:26:05,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 196 transitions. [2023-11-22 18:26:05,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:05,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 196 transitions. [2023-11-22 18:26:05,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.25) internal successors, (196), 16 states have internal predecessors, (196), 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) [2023-11-22 18:26:05,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:26:05,834 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 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) [2023-11-22 18:26:05,834 INFO L175 Difference]: Start difference. First operand has 273 places, 365 transitions, 6716 flow. Second operand 16 states and 196 transitions. [2023-11-22 18:26:05,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 446 transitions, 8413 flow [2023-11-22 18:26:06,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 446 transitions, 8207 flow, removed 64 selfloop flow, removed 9 redundant places. [2023-11-22 18:26:06,443 INFO L231 Difference]: Finished difference. Result has 283 places, 360 transitions, 6539 flow [2023-11-22 18:26:06,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6514, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6539, PETRI_PLACES=283, PETRI_TRANSITIONS=360} [2023-11-22 18:26:06,443 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 256 predicate places. [2023-11-22 18:26:06,444 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 360 transitions, 6539 flow [2023-11-22 18:26:06,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 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) [2023-11-22 18:26:06,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:06,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:06,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-22 18:26:06,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-22 18:26:06,655 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:06,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash -737976984, now seen corresponding path program 9 times [2023-11-22 18:26:06,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:06,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697939515] [2023-11-22 18:26:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:06,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:06,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:06,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697939515] [2023-11-22 18:26:06,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697939515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:06,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647179840] [2023-11-22 18:26:06,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:26:06,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:06,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:06,899 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:06,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-22 18:26:07,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 18:26:07,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:07,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-22 18:26:07,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:07,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-22 18:26:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:26:07,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 18:26:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:26:07,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-22 18:26:07,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:26:07,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 18:26:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:26:07,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-22 18:26:07,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:26:07,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-22 18:26:07,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:26:07,149 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 18:26:07,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-22 18:26:07,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 18:26:07,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 18:26:07,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2023-11-22 18:26:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:26:07,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:09,757 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2023-11-22 18:26:09,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2023-11-22 18:26:10,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:10,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-11-22 18:26:10,185 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:26:10,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 79 [2023-11-22 18:26:10,228 INFO L349 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2023-11-22 18:26:10,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 82 [2023-11-22 18:26:10,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:10,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 71 [2023-11-22 18:26:10,276 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:26:10,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 100 [2023-11-22 18:26:10,309 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2023-11-22 18:26:10,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 89 [2023-11-22 18:26:10,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:10,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2023-11-22 18:26:10,363 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:26:10,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 70 [2023-11-22 18:26:10,396 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2023-11-22 18:26:10,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 74 [2023-11-22 18:26:10,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:10,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 77 [2023-11-22 18:26:10,444 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:26:10,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 109 [2023-11-22 18:26:10,507 INFO L349 Elim1Store]: treesize reduction 16, result has 84.8 percent of original size [2023-11-22 18:26:10,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 137 [2023-11-22 18:26:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:26:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647179840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:10,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:10,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 34 [2023-11-22 18:26:10,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326204108] [2023-11-22 18:26:10,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:10,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-22 18:26:10,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-22 18:26:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=913, Unknown=7, NotChecked=0, Total=1190 [2023-11-22 18:26:10,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:10,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 360 transitions, 6539 flow. Second operand has 35 states, 35 states have (on average 6.9714285714285715) internal successors, (244), 35 states have internal predecessors, (244), 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) [2023-11-22 18:26:10,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:10,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:10,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:14,041 INFO L124 PetriNetUnfolderBase]: 5379/9903 cut-off events. [2023-11-22 18:26:14,041 INFO L125 PetriNetUnfolderBase]: For 228335/228338 co-relation queries the response was YES. [2023-11-22 18:26:14,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68609 conditions, 9903 events. 5379/9903 cut-off events. For 228335/228338 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 75168 event pairs, 1298 based on Foata normal form. 75/9976 useless extension candidates. Maximal degree in co-relation 67636. Up to 6874 conditions per place. [2023-11-22 18:26:14,334 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 499 selfloop transitions, 161 changer transitions 3/666 dead transitions. [2023-11-22 18:26:14,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 666 transitions, 12085 flow [2023-11-22 18:26:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-22 18:26:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-22 18:26:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 449 transitions. [2023-11-22 18:26:14,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418452935694315 [2023-11-22 18:26:14,337 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 449 transitions. [2023-11-22 18:26:14,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 449 transitions. [2023-11-22 18:26:14,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:14,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 449 transitions. [2023-11-22 18:26:14,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 12.135135135135135) internal successors, (449), 37 states have internal predecessors, (449), 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) [2023-11-22 18:26:14,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 29.0) internal successors, (1102), 38 states have internal predecessors, (1102), 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) [2023-11-22 18:26:14,339 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 29.0) internal successors, (1102), 38 states have internal predecessors, (1102), 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) [2023-11-22 18:26:14,340 INFO L175 Difference]: Start difference. First operand has 283 places, 360 transitions, 6539 flow. Second operand 37 states and 449 transitions. [2023-11-22 18:26:14,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 666 transitions, 12085 flow [2023-11-22 18:26:15,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 666 transitions, 11825 flow, removed 53 selfloop flow, removed 13 redundant places. [2023-11-22 18:26:15,191 INFO L231 Difference]: Finished difference. Result has 319 places, 491 transitions, 9434 flow [2023-11-22 18:26:15,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9434, PETRI_PLACES=319, PETRI_TRANSITIONS=491} [2023-11-22 18:26:15,192 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 292 predicate places. [2023-11-22 18:26:15,192 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 491 transitions, 9434 flow [2023-11-22 18:26:15,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.9714285714285715) internal successors, (244), 35 states have internal predecessors, (244), 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) [2023-11-22 18:26:15,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:15,192 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:15,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-22 18:26:15,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:15,403 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:15,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:15,404 INFO L85 PathProgramCache]: Analyzing trace with hash 131389324, now seen corresponding path program 10 times [2023-11-22 18:26:15,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:15,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515363235] [2023-11-22 18:26:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:15,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:15,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:15,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515363235] [2023-11-22 18:26:15,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515363235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:15,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841969021] [2023-11-22 18:26:15,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:26:15,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:15,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:15,614 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:15,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-22 18:26:15,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:26:15,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:15,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-22 18:26:15,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:15,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:15,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 18:26:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:15,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:15,981 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:26:15,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:26:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:16,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841969021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:16,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:16,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2023-11-22 18:26:16,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892114640] [2023-11-22 18:26:16,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:16,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:26:16,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:26:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-22 18:26:16,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:16,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 491 transitions, 9434 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 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) [2023-11-22 18:26:16,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:16,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:16,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:18,939 INFO L124 PetriNetUnfolderBase]: 5578/10284 cut-off events. [2023-11-22 18:26:18,939 INFO L125 PetriNetUnfolderBase]: For 323586/323589 co-relation queries the response was YES. [2023-11-22 18:26:19,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77493 conditions, 10284 events. 5578/10284 cut-off events. For 323586/323589 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78570 event pairs, 1636 based on Foata normal form. 32/10312 useless extension candidates. Maximal degree in co-relation 76496. Up to 8330 conditions per place. [2023-11-22 18:26:19,036 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 493 selfloop transitions, 135 changer transitions 20/651 dead transitions. [2023-11-22 18:26:19,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 651 transitions, 13082 flow [2023-11-22 18:26:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 18:26:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-22 18:26:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 298 transitions. [2023-11-22 18:26:19,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110344827586207 [2023-11-22 18:26:19,038 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 298 transitions. [2023-11-22 18:26:19,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 298 transitions. [2023-11-22 18:26:19,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:19,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 298 transitions. [2023-11-22 18:26:19,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 11.92) internal successors, (298), 25 states have internal predecessors, (298), 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) [2023-11-22 18:26:19,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 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) [2023-11-22 18:26:19,039 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 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) [2023-11-22 18:26:19,040 INFO L175 Difference]: Start difference. First operand has 319 places, 491 transitions, 9434 flow. Second operand 25 states and 298 transitions. [2023-11-22 18:26:19,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 651 transitions, 13082 flow [2023-11-22 18:26:20,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 651 transitions, 12018 flow, removed 501 selfloop flow, removed 7 redundant places. [2023-11-22 18:26:20,364 INFO L231 Difference]: Finished difference. Result has 344 places, 533 transitions, 9983 flow [2023-11-22 18:26:20,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8648, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9983, PETRI_PLACES=344, PETRI_TRANSITIONS=533} [2023-11-22 18:26:20,365 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 317 predicate places. [2023-11-22 18:26:20,365 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 533 transitions, 9983 flow [2023-11-22 18:26:20,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 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) [2023-11-22 18:26:20,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:20,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:20,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-22 18:26:20,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:20,577 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:20,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash -458636452, now seen corresponding path program 10 times [2023-11-22 18:26:20,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:20,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157429656] [2023-11-22 18:26:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:20,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:20,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157429656] [2023-11-22 18:26:20,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157429656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:20,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181317698] [2023-11-22 18:26:20,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:26:20,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:20,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:20,776 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:20,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-22 18:26:20,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:26:20,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:20,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-22 18:26:20,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:20,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 18:26:21,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:21,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-22 18:26:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:26:21,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:21,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:21,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 18:26:21,364 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:26:21,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 18:26:21,399 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 18:26:21,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-22 18:26:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:26:21,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181317698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:21,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:21,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2023-11-22 18:26:21,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647025603] [2023-11-22 18:26:21,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:21,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 18:26:21,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 18:26:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-22 18:26:21,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:21,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 533 transitions, 9983 flow. Second operand has 23 states, 23 states have (on average 7.391304347826087) internal successors, (170), 23 states have internal predecessors, (170), 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) [2023-11-22 18:26:21,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:21,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:21,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:24,878 INFO L124 PetriNetUnfolderBase]: 5728/10581 cut-off events. [2023-11-22 18:26:24,878 INFO L125 PetriNetUnfolderBase]: For 339228/339231 co-relation queries the response was YES. [2023-11-22 18:26:24,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79295 conditions, 10581 events. 5728/10581 cut-off events. For 339228/339231 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 81406 event pairs, 1942 based on Foata normal form. 18/10595 useless extension candidates. Maximal degree in co-relation 79151. Up to 9396 conditions per place. [2023-11-22 18:26:24,996 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 522 selfloop transitions, 110 changer transitions 15/650 dead transitions. [2023-11-22 18:26:24,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 650 transitions, 12692 flow [2023-11-22 18:26:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 18:26:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-22 18:26:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 282 transitions. [2023-11-22 18:26:24,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2023-11-22 18:26:24,997 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 282 transitions. [2023-11-22 18:26:24,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 282 transitions. [2023-11-22 18:26:24,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:24,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 282 transitions. [2023-11-22 18:26:24,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 11.75) internal successors, (282), 24 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:26:24,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 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) [2023-11-22 18:26:24,999 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 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) [2023-11-22 18:26:24,999 INFO L175 Difference]: Start difference. First operand has 344 places, 533 transitions, 9983 flow. Second operand 24 states and 282 transitions. [2023-11-22 18:26:24,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 650 transitions, 12692 flow [2023-11-22 18:26:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 650 transitions, 12102 flow, removed 230 selfloop flow, removed 11 redundant places. [2023-11-22 18:26:26,509 INFO L231 Difference]: Finished difference. Result has 361 places, 547 transitions, 10235 flow [2023-11-22 18:26:26,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9599, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10235, PETRI_PLACES=361, PETRI_TRANSITIONS=547} [2023-11-22 18:26:26,510 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 334 predicate places. [2023-11-22 18:26:26,510 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 547 transitions, 10235 flow [2023-11-22 18:26:26,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.391304347826087) internal successors, (170), 23 states have internal predecessors, (170), 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) [2023-11-22 18:26:26,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:26,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:26,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-22 18:26:26,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-22 18:26:26,714 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:26,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:26,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1842455544, now seen corresponding path program 11 times [2023-11-22 18:26:26,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:26,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303555146] [2023-11-22 18:26:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:26,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:27,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:27,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303555146] [2023-11-22 18:26:27,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303555146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:27,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44050441] [2023-11-22 18:26:27,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:26:27,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:27,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:27,052 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:27,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-22 18:26:27,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 18:26:27,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:27,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:26:27,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:27,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:27,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 18:26:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:27,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:27,391 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:26:27,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:26:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44050441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:27,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:27,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-11-22 18:26:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455910211] [2023-11-22 18:26:27,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:27,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 18:26:27,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 18:26:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-22 18:26:27,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:27,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 547 transitions, 10235 flow. Second operand has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 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) [2023-11-22 18:26:27,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:27,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:27,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:30,698 INFO L124 PetriNetUnfolderBase]: 6125/11304 cut-off events. [2023-11-22 18:26:30,699 INFO L125 PetriNetUnfolderBase]: For 368068/368071 co-relation queries the response was YES. [2023-11-22 18:26:30,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83986 conditions, 11304 events. 6125/11304 cut-off events. For 368068/368071 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88216 event pairs, 1702 based on Foata normal form. 92/11392 useless extension candidates. Maximal degree in co-relation 83834. Up to 8661 conditions per place. [2023-11-22 18:26:30,870 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 573 selfloop transitions, 198 changer transitions 8/782 dead transitions. [2023-11-22 18:26:30,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 782 transitions, 14694 flow [2023-11-22 18:26:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-22 18:26:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-22 18:26:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 464 transitions. [2023-11-22 18:26:30,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-22 18:26:30,872 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 464 transitions. [2023-11-22 18:26:30,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 464 transitions. [2023-11-22 18:26:30,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:30,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 464 transitions. [2023-11-22 18:26:30,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 11.6) internal successors, (464), 40 states have internal predecessors, (464), 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) [2023-11-22 18:26:30,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 29.0) internal successors, (1189), 41 states have internal predecessors, (1189), 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) [2023-11-22 18:26:30,874 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 29.0) internal successors, (1189), 41 states have internal predecessors, (1189), 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) [2023-11-22 18:26:30,874 INFO L175 Difference]: Start difference. First operand has 361 places, 547 transitions, 10235 flow. Second operand 40 states and 464 transitions. [2023-11-22 18:26:30,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 782 transitions, 14694 flow [2023-11-22 18:26:32,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 782 transitions, 14380 flow, removed 96 selfloop flow, removed 13 redundant places. [2023-11-22 18:26:32,724 INFO L231 Difference]: Finished difference. Result has 391 places, 608 transitions, 11455 flow [2023-11-22 18:26:32,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9931, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=11455, PETRI_PLACES=391, PETRI_TRANSITIONS=608} [2023-11-22 18:26:32,725 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 364 predicate places. [2023-11-22 18:26:32,725 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 608 transitions, 11455 flow [2023-11-22 18:26:32,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 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) [2023-11-22 18:26:32,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:32,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:32,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-22 18:26:32,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-22 18:26:32,929 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:32,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1977675250, now seen corresponding path program 11 times [2023-11-22 18:26:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:32,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475911533] [2023-11-22 18:26:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:32,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:33,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:33,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475911533] [2023-11-22 18:26:33,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475911533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:33,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981211113] [2023-11-22 18:26:33,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:26:33,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:33,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:33,176 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:33,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-22 18:26:33,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-22 18:26:33,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:33,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 18:26:33,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:33,443 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 18:26:33,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2023-11-22 18:26:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:33,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:33,535 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-22 18:26:33,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-22 18:26:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:33,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981211113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:33,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:33,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-11-22 18:26:33,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711155484] [2023-11-22 18:26:33,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:33,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 18:26:33,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:33,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 18:26:33,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:26:33,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:33,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 608 transitions, 11455 flow. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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) [2023-11-22 18:26:33,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:33,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:33,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:36,749 INFO L124 PetriNetUnfolderBase]: 6107/11265 cut-off events. [2023-11-22 18:26:36,749 INFO L125 PetriNetUnfolderBase]: For 382873/382876 co-relation queries the response was YES. [2023-11-22 18:26:36,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85502 conditions, 11265 events. 6107/11265 cut-off events. For 382873/382876 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 87680 event pairs, 1814 based on Foata normal form. 26/11287 useless extension candidates. Maximal degree in co-relation 85346. Up to 9139 conditions per place. [2023-11-22 18:26:36,914 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 549 selfloop transitions, 138 changer transitions 32/722 dead transitions. [2023-11-22 18:26:36,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 722 transitions, 14310 flow [2023-11-22 18:26:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 18:26:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-22 18:26:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 280 transitions. [2023-11-22 18:26:36,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438871473354232 [2023-11-22 18:26:36,916 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 280 transitions. [2023-11-22 18:26:36,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 280 transitions. [2023-11-22 18:26:36,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:36,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 280 transitions. [2023-11-22 18:26:36,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:26:36,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 18:26:36,917 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 18:26:36,918 INFO L175 Difference]: Start difference. First operand has 391 places, 608 transitions, 11455 flow. Second operand 22 states and 280 transitions. [2023-11-22 18:26:36,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 722 transitions, 14310 flow [2023-11-22 18:26:38,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 722 transitions, 13847 flow, removed 48 selfloop flow, removed 22 redundant places. [2023-11-22 18:26:38,887 INFO L231 Difference]: Finished difference. Result has 392 places, 603 transitions, 11254 flow [2023-11-22 18:26:38,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10988, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11254, PETRI_PLACES=392, PETRI_TRANSITIONS=603} [2023-11-22 18:26:38,888 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 365 predicate places. [2023-11-22 18:26:38,888 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 603 transitions, 11254 flow [2023-11-22 18:26:38,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 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) [2023-11-22 18:26:38,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:38,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:38,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-22 18:26:39,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-22 18:26:39,099 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:39,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash -545233534, now seen corresponding path program 12 times [2023-11-22 18:26:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:39,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318321665] [2023-11-22 18:26:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:39,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:39,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:39,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318321665] [2023-11-22 18:26:39,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318321665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:39,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344712563] [2023-11-22 18:26:39,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:26:39,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:39,364 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:39,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-22 18:26:39,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-22 18:26:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:39,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-22 18:26:39,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:39,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:26:39,757 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:26:39,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 18:26:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:26:39,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:39,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:39,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 18:26:39,927 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:26:39,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 18:26:39,989 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 18:26:39,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 198 [2023-11-22 18:26:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:26:40,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344712563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:40,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:40,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 25 [2023-11-22 18:26:40,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514215992] [2023-11-22 18:26:40,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:40,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 18:26:40,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:40,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 18:26:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:26:40,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:40,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 603 transitions, 11254 flow. Second operand has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 26 states have internal predecessors, (189), 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) [2023-11-22 18:26:40,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:40,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:40,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:44,557 INFO L124 PetriNetUnfolderBase]: 7355/13569 cut-off events. [2023-11-22 18:26:44,558 INFO L125 PetriNetUnfolderBase]: For 511042/511045 co-relation queries the response was YES. [2023-11-22 18:26:44,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102832 conditions, 13569 events. 7355/13569 cut-off events. For 511042/511045 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 109220 event pairs, 2070 based on Foata normal form. 152/13717 useless extension candidates. Maximal degree in co-relation 102675. Up to 9435 conditions per place. [2023-11-22 18:26:44,750 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 666 selfloop transitions, 260 changer transitions 12/941 dead transitions. [2023-11-22 18:26:44,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 941 transitions, 18345 flow [2023-11-22 18:26:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-22 18:26:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-22 18:26:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 508 transitions. [2023-11-22 18:26:44,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41707717569786534 [2023-11-22 18:26:44,752 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 508 transitions. [2023-11-22 18:26:44,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 508 transitions. [2023-11-22 18:26:44,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:44,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 508 transitions. [2023-11-22 18:26:44,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 12.095238095238095) internal successors, (508), 42 states have internal predecessors, (508), 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) [2023-11-22 18:26:44,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 29.0) internal successors, (1247), 43 states have internal predecessors, (1247), 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) [2023-11-22 18:26:44,754 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 29.0) internal successors, (1247), 43 states have internal predecessors, (1247), 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) [2023-11-22 18:26:44,754 INFO L175 Difference]: Start difference. First operand has 392 places, 603 transitions, 11254 flow. Second operand 42 states and 508 transitions. [2023-11-22 18:26:44,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 941 transitions, 18345 flow [2023-11-22 18:26:47,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 941 transitions, 17879 flow, removed 36 selfloop flow, removed 17 redundant places. [2023-11-22 18:26:47,593 INFO L231 Difference]: Finished difference. Result has 430 places, 708 transitions, 14004 flow [2023-11-22 18:26:47,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10885, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=14004, PETRI_PLACES=430, PETRI_TRANSITIONS=708} [2023-11-22 18:26:47,594 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 403 predicate places. [2023-11-22 18:26:47,594 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 708 transitions, 14004 flow [2023-11-22 18:26:47,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.269230769230769) internal successors, (189), 26 states have internal predecessors, (189), 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) [2023-11-22 18:26:47,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:47,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:47,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-22 18:26:47,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:47,806 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:47,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:47,806 INFO L85 PathProgramCache]: Analyzing trace with hash -72310736, now seen corresponding path program 12 times [2023-11-22 18:26:47,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:47,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898984964] [2023-11-22 18:26:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:47,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:48,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898984964] [2023-11-22 18:26:48,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898984964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:48,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633859671] [2023-11-22 18:26:48,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:26:48,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:48,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:48,031 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:48,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-22 18:26:48,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-22 18:26:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:26:48,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-22 18:26:48,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:48,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 18:26:48,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:48,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 18:26:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:26:48,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:48,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:26:48,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-22 18:26:48,585 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 18:26:48,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-22 18:26:48,629 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-22 18:26:48,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-22 18:26:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:26:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633859671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:48,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2023-11-22 18:26:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270915237] [2023-11-22 18:26:48,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:48,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-22 18:26:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-22 18:26:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-11-22 18:26:48,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:48,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 708 transitions, 14004 flow. Second operand has 24 states, 24 states have (on average 7.375) internal successors, (177), 24 states have internal predecessors, (177), 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) [2023-11-22 18:26:48,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:48,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:48,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:26:53,812 INFO L124 PetriNetUnfolderBase]: 7497/13846 cut-off events. [2023-11-22 18:26:53,812 INFO L125 PetriNetUnfolderBase]: For 599167/599167 co-relation queries the response was YES. [2023-11-22 18:26:53,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110086 conditions, 13846 events. 7497/13846 cut-off events. For 599167/599167 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 112628 event pairs, 2344 based on Foata normal form. 12/13856 useless extension candidates. Maximal degree in co-relation 109911. Up to 10643 conditions per place. [2023-11-22 18:26:53,978 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 610 selfloop transitions, 198 changer transitions 16/827 dead transitions. [2023-11-22 18:26:53,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 827 transitions, 17537 flow [2023-11-22 18:26:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 18:26:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-22 18:26:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 257 transitions. [2023-11-22 18:26:53,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40282131661442006 [2023-11-22 18:26:53,980 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 257 transitions. [2023-11-22 18:26:53,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 257 transitions. [2023-11-22 18:26:53,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:26:53,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 257 transitions. [2023-11-22 18:26:53,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.681818181818182) internal successors, (257), 22 states have internal predecessors, (257), 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) [2023-11-22 18:26:53,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 18:26:53,981 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 18:26:53,981 INFO L175 Difference]: Start difference. First operand has 430 places, 708 transitions, 14004 flow. Second operand 22 states and 257 transitions. [2023-11-22 18:26:53,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 827 transitions, 17537 flow [2023-11-22 18:26:57,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 827 transitions, 16931 flow, removed 231 selfloop flow, removed 17 redundant places. [2023-11-22 18:26:57,164 INFO L231 Difference]: Finished difference. Result has 438 places, 742 transitions, 15065 flow [2023-11-22 18:26:57,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13433, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15065, PETRI_PLACES=438, PETRI_TRANSITIONS=742} [2023-11-22 18:26:57,165 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 411 predicate places. [2023-11-22 18:26:57,165 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 742 transitions, 15065 flow [2023-11-22 18:26:57,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.375) internal successors, (177), 24 states have internal predecessors, (177), 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) [2023-11-22 18:26:57,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:26:57,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:26:57,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-22 18:26:57,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-22 18:26:57,377 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:26:57,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:26:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash -607041226, now seen corresponding path program 13 times [2023-11-22 18:26:57,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:26:57,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098301820] [2023-11-22 18:26:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:26:57,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:26:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:57,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:26:57,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098301820] [2023-11-22 18:26:57,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098301820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:26:57,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256497862] [2023-11-22 18:26:57,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:26:57,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:26:57,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:26:57,599 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:26:57,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-22 18:26:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:26:57,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:26:57,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:26:57,894 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-22 18:26:57,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-11-22 18:26:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:26:57,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:26:57,971 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:26:57,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:26:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:26:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256497862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:26:58,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:26:58,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2023-11-22 18:26:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126247222] [2023-11-22 18:26:58,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:26:58,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:26:58,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:26:58,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:26:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-22 18:26:58,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:26:58,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 742 transitions, 15065 flow. Second operand has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 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) [2023-11-22 18:26:58,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:26:58,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:26:58,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:27:02,704 INFO L124 PetriNetUnfolderBase]: 7393/13671 cut-off events. [2023-11-22 18:27:02,705 INFO L125 PetriNetUnfolderBase]: For 570013/570013 co-relation queries the response was YES. [2023-11-22 18:27:02,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108796 conditions, 13671 events. 7393/13671 cut-off events. For 570013/570013 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 110979 event pairs, 2368 based on Foata normal form. 18/13687 useless extension candidates. Maximal degree in co-relation 108621. Up to 11069 conditions per place. [2023-11-22 18:27:02,911 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 630 selfloop transitions, 152 changer transitions 19/804 dead transitions. [2023-11-22 18:27:02,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 804 transitions, 17154 flow [2023-11-22 18:27:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:27:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-22 18:27:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 183 transitions. [2023-11-22 18:27:02,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206896551724138 [2023-11-22 18:27:02,912 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 183 transitions. [2023-11-22 18:27:02,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 183 transitions. [2023-11-22 18:27:02,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:27:02,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 183 transitions. [2023-11-22 18:27:02,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.2) internal successors, (183), 15 states have internal predecessors, (183), 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) [2023-11-22 18:27:02,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 18:27:02,914 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 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) [2023-11-22 18:27:02,914 INFO L175 Difference]: Start difference. First operand has 438 places, 742 transitions, 15065 flow. Second operand 15 states and 183 transitions. [2023-11-22 18:27:02,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 804 transitions, 17154 flow [2023-11-22 18:27:06,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 804 transitions, 16389 flow, removed 300 selfloop flow, removed 11 redundant places. [2023-11-22 18:27:06,253 INFO L231 Difference]: Finished difference. Result has 441 places, 743 transitions, 14673 flow [2023-11-22 18:27:06,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14305, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14673, PETRI_PLACES=441, PETRI_TRANSITIONS=743} [2023-11-22 18:27:06,254 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 414 predicate places. [2023-11-22 18:27:06,254 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 743 transitions, 14673 flow [2023-11-22 18:27:06,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 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) [2023-11-22 18:27:06,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:27:06,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:27:06,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-22 18:27:06,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-11-22 18:27:06,466 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:27:06,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:27:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1191988324, now seen corresponding path program 13 times [2023-11-22 18:27:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:27:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704274644] [2023-11-22 18:27:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:27:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:27:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:27:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:06,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:27:06,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704274644] [2023-11-22 18:27:06,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704274644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:27:06,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968242601] [2023-11-22 18:27:06,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:27:06,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:06,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:27:06,664 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:27:06,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-22 18:27:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:27:06,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 18:27:06,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:27:06,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:27:06,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2023-11-22 18:27:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:06,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:27:06,991 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:27:06,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:27:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:27:07,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968242601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:27:07,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:27:07,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2023-11-22 18:27:07,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338442103] [2023-11-22 18:27:07,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:27:07,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 18:27:07,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:27:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 18:27:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-22 18:27:07,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:27:07,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 743 transitions, 14673 flow. Second operand has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 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) [2023-11-22 18:27:07,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:27:07,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:27:07,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:27:11,597 INFO L124 PetriNetUnfolderBase]: 7325/13512 cut-off events. [2023-11-22 18:27:11,598 INFO L125 PetriNetUnfolderBase]: For 482622/482622 co-relation queries the response was YES. [2023-11-22 18:27:11,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103825 conditions, 13512 events. 7325/13512 cut-off events. For 482622/482622 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 109003 event pairs, 2344 based on Foata normal form. 48/13558 useless extension candidates. Maximal degree in co-relation 103651. Up to 10653 conditions per place. [2023-11-22 18:27:11,776 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 625 selfloop transitions, 203 changer transitions 2/833 dead transitions. [2023-11-22 18:27:11,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 833 transitions, 17161 flow [2023-11-22 18:27:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 18:27:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-22 18:27:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 235 transitions. [2023-11-22 18:27:11,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426497277676951 [2023-11-22 18:27:11,780 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 235 transitions. [2023-11-22 18:27:11,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 235 transitions. [2023-11-22 18:27:11,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:27:11,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 235 transitions. [2023-11-22 18:27:11,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.368421052631579) internal successors, (235), 19 states have internal predecessors, (235), 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) [2023-11-22 18:27:11,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 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) [2023-11-22 18:27:11,781 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 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) [2023-11-22 18:27:11,781 INFO L175 Difference]: Start difference. First operand has 441 places, 743 transitions, 14673 flow. Second operand 19 states and 235 transitions. [2023-11-22 18:27:11,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 833 transitions, 17161 flow [2023-11-22 18:27:14,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 833 transitions, 16832 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-11-22 18:27:14,442 INFO L231 Difference]: Finished difference. Result has 447 places, 752 transitions, 14939 flow [2023-11-22 18:27:14,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14344, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14939, PETRI_PLACES=447, PETRI_TRANSITIONS=752} [2023-11-22 18:27:14,443 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 420 predicate places. [2023-11-22 18:27:14,443 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 752 transitions, 14939 flow [2023-11-22 18:27:14,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 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) [2023-11-22 18:27:14,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:27:14,443 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:27:14,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-22 18:27:14,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:14,654 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:27:14,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:27:14,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1688037786, now seen corresponding path program 14 times [2023-11-22 18:27:14,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:27:14,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102623600] [2023-11-22 18:27:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:27:14,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:27:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:27:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:14,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:27:14,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102623600] [2023-11-22 18:27:14,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102623600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:27:14,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724463114] [2023-11-22 18:27:14,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:27:14,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:14,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:27:14,874 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:27:14,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-22 18:27:15,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:27:15,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:27:15,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 18:27:15,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:27:15,222 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:27:15,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 18:27:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:27:15,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:27:15,287 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:27:15,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:27:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:27:15,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724463114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:27:15,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:27:15,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 20 [2023-11-22 18:27:15,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590286474] [2023-11-22 18:27:15,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:27:15,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 18:27:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:27:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 18:27:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-11-22 18:27:15,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:27:15,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 752 transitions, 14939 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 18:27:15,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:27:15,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:27:15,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:27:19,932 INFO L124 PetriNetUnfolderBase]: 7361/13557 cut-off events. [2023-11-22 18:27:19,933 INFO L125 PetriNetUnfolderBase]: For 508948/508948 co-relation queries the response was YES. [2023-11-22 18:27:20,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105764 conditions, 13557 events. 7361/13557 cut-off events. For 508948/508948 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 109318 event pairs, 2128 based on Foata normal form. 72/13627 useless extension candidates. Maximal degree in co-relation 105589. Up to 10043 conditions per place. [2023-11-22 18:27:20,091 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 611 selfloop transitions, 230 changer transitions 2/846 dead transitions. [2023-11-22 18:27:20,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 846 transitions, 17981 flow [2023-11-22 18:27:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:27:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-22 18:27:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 218 transitions. [2023-11-22 18:27:20,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421906693711968 [2023-11-22 18:27:20,092 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 218 transitions. [2023-11-22 18:27:20,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 218 transitions. [2023-11-22 18:27:20,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:27:20,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 218 transitions. [2023-11-22 18:27:20,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.823529411764707) internal successors, (218), 17 states have internal predecessors, (218), 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) [2023-11-22 18:27:20,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 18:27:20,094 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 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) [2023-11-22 18:27:20,094 INFO L175 Difference]: Start difference. First operand has 447 places, 752 transitions, 14939 flow. Second operand 17 states and 218 transitions. [2023-11-22 18:27:20,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 846 transitions, 17981 flow [2023-11-22 18:27:23,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 846 transitions, 17542 flow, removed 13 selfloop flow, removed 17 redundant places. [2023-11-22 18:27:23,033 INFO L231 Difference]: Finished difference. Result has 449 places, 759 transitions, 15275 flow [2023-11-22 18:27:23,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14478, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=15275, PETRI_PLACES=449, PETRI_TRANSITIONS=759} [2023-11-22 18:27:23,034 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 422 predicate places. [2023-11-22 18:27:23,034 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 759 transitions, 15275 flow [2023-11-22 18:27:23,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 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) [2023-11-22 18:27:23,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:27:23,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:27:23,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-22 18:27:23,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-22 18:27:23,246 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:27:23,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:27:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1727713888, now seen corresponding path program 14 times [2023-11-22 18:27:23,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:27:23,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582296062] [2023-11-22 18:27:23,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:27:23,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:27:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:27:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:23,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:27:23,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582296062] [2023-11-22 18:27:23,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582296062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:27:23,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821882642] [2023-11-22 18:27:23,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:27:23,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:23,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:27:23,440 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:27:23,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-22 18:27:23,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:27:23,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:27:23,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 18:27:23,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:27:23,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:27:23,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 18:27:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:27:23,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:27:23,788 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:27:23,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:27:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:27:23,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821882642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:27:23,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:27:23,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 15 [2023-11-22 18:27:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120346963] [2023-11-22 18:27:23,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:27:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 18:27:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:27:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 18:27:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-22 18:27:23,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:27:23,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 759 transitions, 15275 flow. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 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) [2023-11-22 18:27:23,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:27:23,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:27:23,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:27:28,263 INFO L124 PetriNetUnfolderBase]: 7375/13658 cut-off events. [2023-11-22 18:27:28,264 INFO L125 PetriNetUnfolderBase]: For 521748/521748 co-relation queries the response was YES. [2023-11-22 18:27:28,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106486 conditions, 13658 events. 7375/13658 cut-off events. For 521748/521748 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 111044 event pairs, 2154 based on Foata normal form. 96/13752 useless extension candidates. Maximal degree in co-relation 106309. Up to 10795 conditions per place. [2023-11-22 18:27:28,428 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 657 selfloop transitions, 185 changer transitions 1/846 dead transitions. [2023-11-22 18:27:28,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 846 transitions, 17872 flow [2023-11-22 18:27:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 18:27:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-22 18:27:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 227 transitions. [2023-11-22 18:27:28,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41197822141560797 [2023-11-22 18:27:28,429 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 227 transitions. [2023-11-22 18:27:28,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 227 transitions. [2023-11-22 18:27:28,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:27:28,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 227 transitions. [2023-11-22 18:27:28,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 11.947368421052632) internal successors, (227), 19 states have internal predecessors, (227), 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) [2023-11-22 18:27:28,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 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) [2023-11-22 18:27:28,431 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 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) [2023-11-22 18:27:28,431 INFO L175 Difference]: Start difference. First operand has 449 places, 759 transitions, 15275 flow. Second operand 19 states and 227 transitions. [2023-11-22 18:27:28,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 846 transitions, 17872 flow [2023-11-22 18:27:31,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 846 transitions, 17479 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-11-22 18:27:31,277 INFO L231 Difference]: Finished difference. Result has 457 places, 766 transitions, 15479 flow [2023-11-22 18:27:31,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14876, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15479, PETRI_PLACES=457, PETRI_TRANSITIONS=766} [2023-11-22 18:27:31,279 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 430 predicate places. [2023-11-22 18:27:31,279 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 766 transitions, 15479 flow [2023-11-22 18:27:31,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 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) [2023-11-22 18:27:31,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:27:31,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:27:31,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-22 18:27:31,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:31,490 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:27:31,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:27:31,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1776247408, now seen corresponding path program 15 times [2023-11-22 18:27:31,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:27:31,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785331061] [2023-11-22 18:27:31,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:27:31,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:27:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:27:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:31,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:27:31,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785331061] [2023-11-22 18:27:31,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785331061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:27:31,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525103831] [2023-11-22 18:27:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:27:31,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:31,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:27:31,725 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:27:31,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-22 18:27:31,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 18:27:31,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:27:31,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 18:27:31,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:27:32,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:27:32,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-22 18:27:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:27:32,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:27:32,097 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-22 18:27:32,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-22 18:27:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:27:32,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525103831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:27:32,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:27:32,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 15 [2023-11-22 18:27:32,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425722018] [2023-11-22 18:27:32,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:27:32,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 18:27:32,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:27:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 18:27:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-22 18:27:32,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:27:32,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 766 transitions, 15479 flow. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 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) [2023-11-22 18:27:32,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:27:32,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:27:32,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:27:36,664 INFO L124 PetriNetUnfolderBase]: 7069/13016 cut-off events. [2023-11-22 18:27:36,664 INFO L125 PetriNetUnfolderBase]: For 465662/465662 co-relation queries the response was YES. [2023-11-22 18:27:36,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102322 conditions, 13016 events. 7069/13016 cut-off events. For 465662/465662 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 104080 event pairs, 2114 based on Foata normal form. 18/13032 useless extension candidates. Maximal degree in co-relation 102143. Up to 10795 conditions per place. [2023-11-22 18:27:36,815 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 637 selfloop transitions, 187 changer transitions 15/842 dead transitions. [2023-11-22 18:27:36,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 842 transitions, 17890 flow [2023-11-22 18:27:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 18:27:36,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-22 18:27:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 237 transitions. [2023-11-22 18:27:36,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3714733542319749 [2023-11-22 18:27:36,817 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 237 transitions. [2023-11-22 18:27:36,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 237 transitions. [2023-11-22 18:27:36,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:27:36,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 237 transitions. [2023-11-22 18:27:36,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 10.772727272727273) internal successors, (237), 22 states have internal predecessors, (237), 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) [2023-11-22 18:27:36,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 18:27:36,818 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 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) [2023-11-22 18:27:36,818 INFO L175 Difference]: Start difference. First operand has 457 places, 766 transitions, 15479 flow. Second operand 22 states and 237 transitions. [2023-11-22 18:27:36,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 842 transitions, 17890 flow [2023-11-22 18:27:39,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 842 transitions, 17621 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-11-22 18:27:39,394 INFO L231 Difference]: Finished difference. Result has 468 places, 767 transitions, 15728 flow [2023-11-22 18:27:39,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=15152, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15728, PETRI_PLACES=468, PETRI_TRANSITIONS=767} [2023-11-22 18:27:39,395 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 441 predicate places. [2023-11-22 18:27:39,395 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 767 transitions, 15728 flow [2023-11-22 18:27:39,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 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) [2023-11-22 18:27:39,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:27:39,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:27:39,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-22 18:27:39,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:39,607 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:27:39,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:27:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash 21755395, now seen corresponding path program 8 times [2023-11-22 18:27:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:27:39,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311283061] [2023-11-22 18:27:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:27:39,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:27:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:27:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:39,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:27:39,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311283061] [2023-11-22 18:27:39,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311283061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:27:39,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019788108] [2023-11-22 18:27:39,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:27:39,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:39,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:27:39,672 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:27:39,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-22 18:27:39,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:27:39,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:27:39,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 18:27:39,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:27:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:39,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:27:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:27:39,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019788108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:27:39,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:27:39,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-22 18:27:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257503875] [2023-11-22 18:27:39,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:27:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 18:27:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:27:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 18:27:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-22 18:27:39,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:27:39,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 767 transitions, 15728 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 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) [2023-11-22 18:27:39,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:27:39,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:27:39,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:27:44,923 INFO L124 PetriNetUnfolderBase]: 8359/15382 cut-off events. [2023-11-22 18:27:44,923 INFO L125 PetriNetUnfolderBase]: For 637606/637609 co-relation queries the response was YES. [2023-11-22 18:27:45,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124701 conditions, 15382 events. 8359/15382 cut-off events. For 637606/637609 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 126576 event pairs, 2358 based on Foata normal form. 16/15394 useless extension candidates. Maximal degree in co-relation 124520. Up to 11484 conditions per place. [2023-11-22 18:27:45,294 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 761 selfloop transitions, 163 changer transitions 2/929 dead transitions. [2023-11-22 18:27:45,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 929 transitions, 20574 flow [2023-11-22 18:27:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 18:27:45,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-22 18:27:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2023-11-22 18:27:45,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5827586206896552 [2023-11-22 18:27:45,295 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 169 transitions. [2023-11-22 18:27:45,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 169 transitions. [2023-11-22 18:27:45,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:27:45,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 169 transitions. [2023-11-22 18:27:45,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.9) internal successors, (169), 10 states have internal predecessors, (169), 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) [2023-11-22 18:27:45,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 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) [2023-11-22 18:27:45,297 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 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) [2023-11-22 18:27:45,297 INFO L175 Difference]: Start difference. First operand has 468 places, 767 transitions, 15728 flow. Second operand 10 states and 169 transitions. [2023-11-22 18:27:45,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 929 transitions, 20574 flow [2023-11-22 18:27:48,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 929 transitions, 20115 flow, removed 47 selfloop flow, removed 17 redundant places. [2023-11-22 18:27:48,997 INFO L231 Difference]: Finished difference. Result has 460 places, 816 transitions, 17030 flow [2023-11-22 18:27:48,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=15269, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17030, PETRI_PLACES=460, PETRI_TRANSITIONS=816} [2023-11-22 18:27:48,998 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 433 predicate places. [2023-11-22 18:27:48,998 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 816 transitions, 17030 flow [2023-11-22 18:27:48,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 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) [2023-11-22 18:27:48,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 18:27:48,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:27:49,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-22 18:27:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-22 18:27:49,210 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-22 18:27:49,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:27:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash 353010415, now seen corresponding path program 9 times [2023-11-22 18:27:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:27:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031782225] [2023-11-22 18:27:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:27:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:27:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:27:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:49,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:27:49,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031782225] [2023-11-22 18:27:49,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031782225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:27:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200823654] [2023-11-22 18:27:49,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:27:49,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:27:49,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:27:49,270 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:27:49,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-22 18:27:49,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-22 18:27:49,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:27:49,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 18:27:49,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:27:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:27:49,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:27:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:27:49,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200823654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:27:49,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:27:49,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-22 18:27:49,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463586221] [2023-11-22 18:27:49,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:27:49,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 18:27:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:27:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 18:27:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-22 18:27:49,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-22 18:27:49,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 816 transitions, 17030 flow. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 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) [2023-11-22 18:27:49,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 18:27:49,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-22 18:27:49,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 18:27:55,443 INFO L124 PetriNetUnfolderBase]: 9651/17773 cut-off events. [2023-11-22 18:27:55,444 INFO L125 PetriNetUnfolderBase]: For 813492/813495 co-relation queries the response was YES. [2023-11-22 18:27:55,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148415 conditions, 17773 events. 9651/17773 cut-off events. For 813492/813495 co-relation queries the response was YES. Maximal size of possible extension queue 963. Compared 150149 event pairs, 2578 based on Foata normal form. 18/17787 useless extension candidates. Maximal degree in co-relation 148229. Up to 10868 conditions per place. [2023-11-22 18:27:55,681 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 641 selfloop transitions, 315 changer transitions 3/962 dead transitions. [2023-11-22 18:27:55,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 962 transitions, 21756 flow [2023-11-22 18:27:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 18:27:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-22 18:27:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2023-11-22 18:27:55,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2023-11-22 18:27:55,682 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 160 transitions. [2023-11-22 18:27:55,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 160 transitions. [2023-11-22 18:27:55,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 18:27:55,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 160 transitions. [2023-11-22 18:27:55,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 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) [2023-11-22 18:27:55,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 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) [2023-11-22 18:27:55,684 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 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) [2023-11-22 18:27:55,684 INFO L175 Difference]: Start difference. First operand has 460 places, 816 transitions, 17030 flow. Second operand 10 states and 160 transitions. [2023-11-22 18:27:55,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 962 transitions, 21756 flow