./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c4f91361 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/chl-array-int-subst.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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 15:04:23,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 15:04:23,654 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 15:04:23,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 15:04:23,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 15:04:23,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 15:04:23,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 15:04:23,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 15:04:23,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 15:04:23,702 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 15:04:23,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 15:04:23,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 15:04:23,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 15:04:23,704 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 15:04:23,705 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 15:04:23,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 15:04:23,705 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 15:04:23,705 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 15:04:23,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 15:04:23,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 15:04:23,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 15:04:23,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 15:04:23,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 15:04:23,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 15:04:23,708 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 15:04:23,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 15:04:23,708 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 15:04:23,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 15:04:23,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 15:04:23,709 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 15:04:23,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 15:04:23,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:04:23,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 15:04:23,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 15:04:23,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 15:04:23,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 15:04:23,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 15:04:23,711 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 15:04:23,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 15:04:23,712 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 15:04:23,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 15:04:23,712 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 15:04:23,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-23 15:04:23,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 15:04:23,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 15:04:23,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 15:04:23,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 15:04:23,969 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 15:04:23,970 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-11-23 15:04:24,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 15:04:25,160 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 15:04:25,162 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-11-23 15:04:25,172 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e0ac388/68b3df824e404e0d8577767d86c57422/FLAG5fac6d59d [2023-11-23 15:04:25,189 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40e0ac388/68b3df824e404e0d8577767d86c57422 [2023-11-23 15:04:25,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 15:04:25,194 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 15:04:25,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 15:04:25,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 15:04:25,202 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 15:04:25,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,203 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b24c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25, skipping insertion in model container [2023-11-23 15:04:25,203 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,232 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 15:04:25,360 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/chl-array-int-subst.wvr.c[2820,2833] [2023-11-23 15:04:25,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:04:25,377 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 15:04:25,394 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/chl-array-int-subst.wvr.c[2820,2833] [2023-11-23 15:04:25,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:04:25,410 INFO L206 MainTranslator]: Completed translation [2023-11-23 15:04:25,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25 WrapperNode [2023-11-23 15:04:25,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 15:04:25,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 15:04:25,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 15:04:25,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 15:04:25,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,459 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 292 [2023-11-23 15:04:25,459 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 15:04:25,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 15:04:25,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 15:04:25,460 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 15:04:25,469 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,473 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,488 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 15, 2, 2, 2]. 65 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 3, 1, 1, 1]. [2023-11-23 15:04:25,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,502 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 15:04:25,513 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 15:04:25,513 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 15:04:25,513 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 15:04:25,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2023-11-23 15:04:25,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:04:25,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:25,554 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) [2023-11-23 15:04:25,572 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 [2023-11-23 15:04:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 15:04:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 15:04:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 15:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 15:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 15:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 15:04:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 15:04:25,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 15:04:25,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 15:04:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 15:04:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 15:04:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 15:04:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 15:04:25,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 15:04:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 15:04:25,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 15:04:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 15:04:25,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 15:04:25,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 15:04:25,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 15:04:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 15:04:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 15:04:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 15:04:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 15:04:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 15:04:25,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 15:04:25,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 15:04:25,646 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 15:04:25,788 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 15:04:25,791 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 15:04:26,235 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 15:04:26,431 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 15:04:26,431 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 15:04:26,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:26 BoogieIcfgContainer [2023-11-23 15:04:26,431 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 15:04:26,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 15:04:26,434 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 15:04:26,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 15:04:26,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:04:25" (1/3) ... [2023-11-23 15:04:26,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7995f4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:26, skipping insertion in model container [2023-11-23 15:04:26,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (2/3) ... [2023-11-23 15:04:26,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7995f4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:26, skipping insertion in model container [2023-11-23 15:04:26,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:26" (3/3) ... [2023-11-23 15:04:26,438 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-11-23 15:04:26,445 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 15:04:26,451 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 15:04:26,451 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 15:04:26,451 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 15:04:26,495 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 15:04:26,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 105 flow [2023-11-23 15:04:26,583 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2023-11-23 15:04:26,583 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 15:04:26,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 9/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-23 15:04:26,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 105 flow [2023-11-23 15:04:26,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 94 flow [2023-11-23 15:04:26,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 15:04:26,638 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;@4b28d0ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 15:04:26,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 15:04:26,657 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 15:04:26,657 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2023-11-23 15:04:26,657 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 15:04:26,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:26,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:26,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:26,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:26,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1310840306, now seen corresponding path program 1 times [2023-11-23 15:04:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:26,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745752014] [2023-11-23 15:04:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745752014] [2023-11-23 15:04:27,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745752014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:27,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:04:27,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 15:04:27,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633128624] [2023-11-23 15:04:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:27,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:04:27,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:27,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:04:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:04:27,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:27,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:27,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:27,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:27,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:28,246 INFO L124 PetriNetUnfolderBase]: 2963/4045 cut-off events. [2023-11-23 15:04:28,246 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-11-23 15:04:28,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8312 conditions, 4045 events. 2963/4045 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16424 event pairs, 268 based on Foata normal form. 1/2916 useless extension candidates. Maximal degree in co-relation 4518. Up to 1349 conditions per place. [2023-11-23 15:04:28,271 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 16 changer transitions 1/142 dead transitions. [2023-11-23 15:04:28,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 142 transitions, 632 flow [2023-11-23 15:04:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:04:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 15:04:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2023-11-23 15:04:28,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-23 15:04:28,284 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 182 transitions. [2023-11-23 15:04:28,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 182 transitions. [2023-11-23 15:04:28,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:28,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 182 transitions. [2023-11-23 15:04:28,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:28,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:28,295 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:28,296 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 94 flow. Second operand 10 states and 182 transitions. [2023-11-23 15:04:28,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 142 transitions, 632 flow [2023-11-23 15:04:28,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 142 transitions, 588 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 15:04:28,306 INFO L231 Difference]: Finished difference. Result has 46 places, 54 transitions, 182 flow [2023-11-23 15:04:28,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=46, PETRI_TRANSITIONS=54} [2023-11-23 15:04:28,310 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-11-23 15:04:28,310 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 54 transitions, 182 flow [2023-11-23 15:04:28,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:28,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:28,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 15:04:28,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:28,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 223476662, now seen corresponding path program 2 times [2023-11-23 15:04:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:28,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267484941] [2023-11-23 15:04:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:28,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267484941] [2023-11-23 15:04:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267484941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:28,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:04:28,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 15:04:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853283754] [2023-11-23 15:04:28,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:28,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:04:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:28,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:04:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:04:28,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:28,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 54 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:28,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:28,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:28,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:29,211 INFO L124 PetriNetUnfolderBase]: 3361/4649 cut-off events. [2023-11-23 15:04:29,211 INFO L125 PetriNetUnfolderBase]: For 643/643 co-relation queries the response was YES. [2023-11-23 15:04:29,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10220 conditions, 4649 events. 3361/4649 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19798 event pairs, 1194 based on Foata normal form. 1/3818 useless extension candidates. Maximal degree in co-relation 10196. Up to 1985 conditions per place. [2023-11-23 15:04:29,226 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 14 changer transitions 1/132 dead transitions. [2023-11-23 15:04:29,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 132 transitions, 627 flow [2023-11-23 15:04:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 15:04:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-23 15:04:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2023-11-23 15:04:29,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2023-11-23 15:04:29,232 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 164 transitions. [2023-11-23 15:04:29,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 164 transitions. [2023-11-23 15:04:29,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:29,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 164 transitions. [2023-11-23 15:04:29,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 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) [2023-11-23 15:04:29,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:29,236 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:29,236 INFO L175 Difference]: Start difference. First operand has 46 places, 54 transitions, 182 flow. Second operand 9 states and 164 transitions. [2023-11-23 15:04:29,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 132 transitions, 627 flow [2023-11-23 15:04:29,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 132 transitions, 621 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-23 15:04:29,244 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 227 flow [2023-11-23 15:04:29,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=227, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-11-23 15:04:29,245 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2023-11-23 15:04:29,245 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 227 flow [2023-11-23 15:04:29,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:29,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:29,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:29,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 15:04:29,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:29,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1310299412, now seen corresponding path program 1 times [2023-11-23 15:04:29,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:29,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882234588] [2023-11-23 15:04:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:29,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:29,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882234588] [2023-11-23 15:04:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882234588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:29,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623556601] [2023-11-23 15:04:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:29,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:29,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:29,389 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) [2023-11-23 15:04:29,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 15:04:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:29,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 15:04:29,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:29,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:04:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:29,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623556601] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:29,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:04:29,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-23 15:04:29,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464966421] [2023-11-23 15:04:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:29,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 15:04:29,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:29,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 15:04:29,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:04:29,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:29,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 227 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) [2023-11-23 15:04:29,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:29,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:29,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:30,296 INFO L124 PetriNetUnfolderBase]: 4810/6659 cut-off events. [2023-11-23 15:04:30,296 INFO L125 PetriNetUnfolderBase]: For 1906/1906 co-relation queries the response was YES. [2023-11-23 15:04:30,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 6659 events. 4810/6659 cut-off events. For 1906/1906 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30023 event pairs, 2572 based on Foata normal form. 1/5505 useless extension candidates. Maximal degree in co-relation 15428. Up to 3223 conditions per place. [2023-11-23 15:04:30,320 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 128 selfloop transitions, 8 changer transitions 7/144 dead transitions. [2023-11-23 15:04:30,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 144 transitions, 756 flow [2023-11-23 15:04:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:04:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 15:04:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2023-11-23 15:04:30,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2023-11-23 15:04:30,322 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 155 transitions. [2023-11-23 15:04:30,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 155 transitions. [2023-11-23 15:04:30,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:30,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 155 transitions. [2023-11-23 15:04:30,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 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) [2023-11-23 15:04:30,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:30,325 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:30,325 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 227 flow. Second operand 6 states and 155 transitions. [2023-11-23 15:04:30,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 144 transitions, 756 flow [2023-11-23 15:04:30,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 144 transitions, 738 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 15:04:30,336 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 244 flow [2023-11-23 15:04:30,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-11-23 15:04:30,337 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-11-23 15:04:30,338 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 244 flow [2023-11-23 15:04:30,338 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) [2023-11-23 15:04:30,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:30,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:30,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 15:04:30,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:30,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:30,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:30,553 INFO L85 PathProgramCache]: Analyzing trace with hash 56937492, now seen corresponding path program 1 times [2023-11-23 15:04:30,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:30,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383717726] [2023-11-23 15:04:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:30,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:30,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:30,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383717726] [2023-11-23 15:04:30,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383717726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:30,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:04:30,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 15:04:30,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106850292] [2023-11-23 15:04:30,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:30,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:04:30,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:30,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:04:30,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:04:30,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:30,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:30,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:30,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:30,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:31,058 INFO L124 PetriNetUnfolderBase]: 3995/5695 cut-off events. [2023-11-23 15:04:31,058 INFO L125 PetriNetUnfolderBase]: For 1713/1713 co-relation queries the response was YES. [2023-11-23 15:04:31,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13486 conditions, 5695 events. 3995/5695 cut-off events. For 1713/1713 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26677 event pairs, 1336 based on Foata normal form. 0/5091 useless extension candidates. Maximal degree in co-relation 11780. Up to 3496 conditions per place. [2023-11-23 15:04:31,077 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 98 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2023-11-23 15:04:31,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 107 transitions, 590 flow [2023-11-23 15:04:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:04:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:04:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2023-11-23 15:04:31,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-11-23 15:04:31,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 108 transitions. [2023-11-23 15:04:31,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 108 transitions. [2023-11-23 15:04:31,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:31,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 108 transitions. [2023-11-23 15:04:31,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.6) internal successors, (108), 5 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) [2023-11-23 15:04:31,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:31,080 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:31,080 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 244 flow. Second operand 5 states and 108 transitions. [2023-11-23 15:04:31,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 107 transitions, 590 flow [2023-11-23 15:04:31,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 107 transitions, 566 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-23 15:04:31,085 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 237 flow [2023-11-23 15:04:31,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-11-23 15:04:31,086 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-11-23 15:04:31,086 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 237 flow [2023-11-23 15:04:31,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:31,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:31,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:31,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 15:04:31,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:31,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:31,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1846353436, now seen corresponding path program 1 times [2023-11-23 15:04:31,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:31,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81107354] [2023-11-23 15:04:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:31,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:31,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:31,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81107354] [2023-11-23 15:04:31,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81107354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:31,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20950044] [2023-11-23 15:04:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:31,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:31,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:31,321 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) [2023-11-23 15:04:31,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 15:04:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:31,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 15:04:31,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:31,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:04:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:31,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20950044] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:31,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:04:31,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 20 [2023-11-23 15:04:31,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768297338] [2023-11-23 15:04:31,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:31,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:04:31,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:04:31,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-23 15:04:31,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:31,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 237 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:31,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:31,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:31,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:32,943 INFO L124 PetriNetUnfolderBase]: 8700/12221 cut-off events. [2023-11-23 15:04:32,943 INFO L125 PetriNetUnfolderBase]: For 4636/4636 co-relation queries the response was YES. [2023-11-23 15:04:32,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28780 conditions, 12221 events. 8700/12221 cut-off events. For 4636/4636 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 63538 event pairs, 2208 based on Foata normal form. 2/10750 useless extension candidates. Maximal degree in co-relation 27221. Up to 3215 conditions per place. [2023-11-23 15:04:32,986 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 193 selfloop transitions, 37 changer transitions 1/232 dead transitions. [2023-11-23 15:04:32,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 232 transitions, 1257 flow [2023-11-23 15:04:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 15:04:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 15:04:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2023-11-23 15:04:32,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-11-23 15:04:32,988 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 242 transitions. [2023-11-23 15:04:32,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 242 transitions. [2023-11-23 15:04:32,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:32,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 242 transitions. [2023-11-23 15:04:32,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 22.0) internal successors, (242), 11 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:32,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 42.0) internal successors, (504), 12 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:32,990 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 42.0) internal successors, (504), 12 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:32,990 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 237 flow. Second operand 11 states and 242 transitions. [2023-11-23 15:04:32,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 232 transitions, 1257 flow [2023-11-23 15:04:32,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 232 transitions, 1240 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-23 15:04:32,998 INFO L231 Difference]: Finished difference. Result has 72 places, 92 transitions, 586 flow [2023-11-23 15:04:32,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=586, PETRI_PLACES=72, PETRI_TRANSITIONS=92} [2023-11-23 15:04:33,000 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 33 predicate places. [2023-11-23 15:04:33,000 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 92 transitions, 586 flow [2023-11-23 15:04:33,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:33,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:33,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:33,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 15:04:33,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:33,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:33,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:33,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1919751364, now seen corresponding path program 2 times [2023-11-23 15:04:33,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:33,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366598951] [2023-11-23 15:04:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:33,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:33,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366598951] [2023-11-23 15:04:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366598951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391293729] [2023-11-23 15:04:33,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:04:33,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:33,418 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) [2023-11-23 15:04:33,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 15:04:33,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 15:04:33,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:04:33,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 15:04:33,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:33,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:04:33,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391293729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:33,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:04:33,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2023-11-23 15:04:33,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91673738] [2023-11-23 15:04:33,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:33,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:04:33,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:04:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:04:33,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:33,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 92 transitions, 586 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:33,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:33,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:33,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:35,270 INFO L124 PetriNetUnfolderBase]: 13314/18667 cut-off events. [2023-11-23 15:04:35,271 INFO L125 PetriNetUnfolderBase]: For 15144/15144 co-relation queries the response was YES. [2023-11-23 15:04:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48529 conditions, 18667 events. 13314/18667 cut-off events. For 15144/15144 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 104057 event pairs, 2254 based on Foata normal form. 3/16872 useless extension candidates. Maximal degree in co-relation 40764. Up to 6356 conditions per place. [2023-11-23 15:04:35,367 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 166 selfloop transitions, 51 changer transitions 1/219 dead transitions. [2023-11-23 15:04:35,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 219 transitions, 1507 flow [2023-11-23 15:04:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:04:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 15:04:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2023-11-23 15:04:35,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2023-11-23 15:04:35,369 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 198 transitions. [2023-11-23 15:04:35,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 198 transitions. [2023-11-23 15:04:35,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:35,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 198 transitions. [2023-11-23 15:04:35,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:35,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:35,370 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:35,370 INFO L175 Difference]: Start difference. First operand has 72 places, 92 transitions, 586 flow. Second operand 10 states and 198 transitions. [2023-11-23 15:04:35,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 219 transitions, 1507 flow [2023-11-23 15:04:35,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 219 transitions, 1481 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-11-23 15:04:35,432 INFO L231 Difference]: Finished difference. Result has 84 places, 110 transitions, 866 flow [2023-11-23 15:04:35,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=866, PETRI_PLACES=84, PETRI_TRANSITIONS=110} [2023-11-23 15:04:35,433 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 45 predicate places. [2023-11-23 15:04:35,433 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 110 transitions, 866 flow [2023-11-23 15:04:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:35,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:35,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:35,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 15:04:35,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:35,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:35,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:35,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1125886898, now seen corresponding path program 1 times [2023-11-23 15:04:35,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:35,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921494116] [2023-11-23 15:04:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:35,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:35,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921494116] [2023-11-23 15:04:35,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921494116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:35,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:04:35,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 15:04:35,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527427602] [2023-11-23 15:04:35,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:35,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:04:35,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:04:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:04:35,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:35,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 110 transitions, 866 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:35,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:35,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:35,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:36,777 INFO L124 PetriNetUnfolderBase]: 9185/13498 cut-off events. [2023-11-23 15:04:36,777 INFO L125 PetriNetUnfolderBase]: For 20000/20000 co-relation queries the response was YES. [2023-11-23 15:04:36,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37916 conditions, 13498 events. 9185/13498 cut-off events. For 20000/20000 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 77818 event pairs, 3299 based on Foata normal form. 0/12732 useless extension candidates. Maximal degree in co-relation 33092. Up to 8586 conditions per place. [2023-11-23 15:04:36,839 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 124 selfloop transitions, 16 changer transitions 10/151 dead transitions. [2023-11-23 15:04:36,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 151 transitions, 1298 flow [2023-11-23 15:04:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:04:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 15:04:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2023-11-23 15:04:36,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-23 15:04:36,841 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 112 transitions. [2023-11-23 15:04:36,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 112 transitions. [2023-11-23 15:04:36,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:36,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 112 transitions. [2023-11-23 15:04:36,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:36,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:36,843 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:36,843 INFO L175 Difference]: Start difference. First operand has 84 places, 110 transitions, 866 flow. Second operand 6 states and 112 transitions. [2023-11-23 15:04:36,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 151 transitions, 1298 flow [2023-11-23 15:04:36,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 151 transitions, 1262 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-23 15:04:36,944 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 734 flow [2023-11-23 15:04:36,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=734, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2023-11-23 15:04:36,945 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 48 predicate places. [2023-11-23 15:04:36,945 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 734 flow [2023-11-23 15:04:36,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:36,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:36,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:36,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 15:04:36,945 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:36,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:36,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1774513374, now seen corresponding path program 3 times [2023-11-23 15:04:36,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:36,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227249907] [2023-11-23 15:04:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:36,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:37,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:37,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227249907] [2023-11-23 15:04:37,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227249907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:37,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742840001] [2023-11-23 15:04:37,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 15:04:37,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:37,214 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) [2023-11-23 15:04:37,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 15:04:37,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 15:04:37,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:04:37,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 15:04:37,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:37,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:04:37,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742840001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:37,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:04:37,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2023-11-23 15:04:37,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177966691] [2023-11-23 15:04:37,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:37,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:04:37,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:04:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:04:37,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:37,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 94 transitions, 734 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:37,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:37,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:37,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:38,835 INFO L124 PetriNetUnfolderBase]: 9413/13801 cut-off events. [2023-11-23 15:04:38,836 INFO L125 PetriNetUnfolderBase]: For 24168/24168 co-relation queries the response was YES. [2023-11-23 15:04:38,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39621 conditions, 13801 events. 9413/13801 cut-off events. For 24168/24168 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 80830 event pairs, 1914 based on Foata normal form. 3/13150 useless extension candidates. Maximal degree in co-relation 39470. Up to 5535 conditions per place. [2023-11-23 15:04:38,905 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 143 selfloop transitions, 48 changer transitions 3/195 dead transitions. [2023-11-23 15:04:38,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 195 transitions, 1502 flow [2023-11-23 15:04:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:04:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 15:04:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2023-11-23 15:04:38,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-11-23 15:04:38,907 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 186 transitions. [2023-11-23 15:04:38,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 186 transitions. [2023-11-23 15:04:38,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:38,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 186 transitions. [2023-11-23 15:04:38,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.6) internal successors, (186), 10 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:38,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:38,909 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:38,909 INFO L175 Difference]: Start difference. First operand has 87 places, 94 transitions, 734 flow. Second operand 10 states and 186 transitions. [2023-11-23 15:04:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 195 transitions, 1502 flow [2023-11-23 15:04:38,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 195 transitions, 1467 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-23 15:04:38,962 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 993 flow [2023-11-23 15:04:38,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=993, PETRI_PLACES=92, PETRI_TRANSITIONS=106} [2023-11-23 15:04:38,962 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2023-11-23 15:04:38,962 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 993 flow [2023-11-23 15:04:38,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:38,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:38,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:38,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 15:04:39,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:39,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:39,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1004172488, now seen corresponding path program 4 times [2023-11-23 15:04:39,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:39,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434836477] [2023-11-23 15:04:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:39,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434836477] [2023-11-23 15:04:39,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434836477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:39,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113046118] [2023-11-23 15:04:39,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 15:04:39,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:39,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:39,400 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) [2023-11-23 15:04:39,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 15:04:39,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 15:04:39,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:04:39,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 15:04:39,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:39,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:04:39,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113046118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:39,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:04:39,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-11-23 15:04:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195919816] [2023-11-23 15:04:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:04:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:04:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-23 15:04:39,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:39,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 106 transitions, 993 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:39,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:39,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:39,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:40,926 INFO L124 PetriNetUnfolderBase]: 11793/17136 cut-off events. [2023-11-23 15:04:40,926 INFO L125 PetriNetUnfolderBase]: For 41796/41796 co-relation queries the response was YES. [2023-11-23 15:04:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51558 conditions, 17136 events. 11793/17136 cut-off events. For 41796/41796 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 101708 event pairs, 1194 based on Foata normal form. 4/16322 useless extension candidates. Maximal degree in co-relation 46678. Up to 7901 conditions per place. [2023-11-23 15:04:40,991 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 48 changer transitions 1/196 dead transitions. [2023-11-23 15:04:40,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 196 transitions, 1859 flow [2023-11-23 15:04:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:04:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 15:04:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2023-11-23 15:04:40,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2023-11-23 15:04:40,993 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 134 transitions. [2023-11-23 15:04:40,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 134 transitions. [2023-11-23 15:04:40,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:40,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 134 transitions. [2023-11-23 15:04:40,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:40,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:40,994 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:40,994 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 993 flow. Second operand 6 states and 134 transitions. [2023-11-23 15:04:40,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 196 transitions, 1859 flow [2023-11-23 15:04:41,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 196 transitions, 1806 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-11-23 15:04:41,166 INFO L231 Difference]: Finished difference. Result has 96 places, 130 transitions, 1387 flow [2023-11-23 15:04:41,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1387, PETRI_PLACES=96, PETRI_TRANSITIONS=130} [2023-11-23 15:04:41,167 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2023-11-23 15:04:41,167 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 130 transitions, 1387 flow [2023-11-23 15:04:41,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:41,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:41,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:41,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 15:04:41,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:41,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:41,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash -248587640, now seen corresponding path program 5 times [2023-11-23 15:04:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:41,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161647392] [2023-11-23 15:04:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:41,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:41,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:41,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161647392] [2023-11-23 15:04:41,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161647392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306497600] [2023-11-23 15:04:41,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 15:04:41,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:41,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:41,646 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) [2023-11-23 15:04:41,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 15:04:41,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:04:41,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:04:41,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 15:04:41,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:41,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:04:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306497600] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:42,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:04:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 20 [2023-11-23 15:04:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407175574] [2023-11-23 15:04:42,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:42,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:04:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:04:42,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-23 15:04:42,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:42,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 130 transitions, 1387 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:42,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:42,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:42,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:44,152 INFO L124 PetriNetUnfolderBase]: 12606/18373 cut-off events. [2023-11-23 15:04:44,152 INFO L125 PetriNetUnfolderBase]: For 63408/63408 co-relation queries the response was YES. [2023-11-23 15:04:44,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58237 conditions, 18373 events. 12606/18373 cut-off events. For 63408/63408 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 111803 event pairs, 3086 based on Foata normal form. 2/17515 useless extension candidates. Maximal degree in co-relation 53681. Up to 6053 conditions per place. [2023-11-23 15:04:44,241 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 236 selfloop transitions, 58 changer transitions 3/298 dead transitions. [2023-11-23 15:04:44,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 298 transitions, 2656 flow [2023-11-23 15:04:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 15:04:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 15:04:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 280 transitions. [2023-11-23 15:04:44,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-23 15:04:44,243 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 280 transitions. [2023-11-23 15:04:44,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 280 transitions. [2023-11-23 15:04:44,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:44,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 280 transitions. [2023-11-23 15:04:44,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 20.0) internal successors, (280), 14 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) [2023-11-23 15:04:44,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 42.0) internal successors, (630), 15 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:44,245 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 42.0) internal successors, (630), 15 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:44,245 INFO L175 Difference]: Start difference. First operand has 96 places, 130 transitions, 1387 flow. Second operand 14 states and 280 transitions. [2023-11-23 15:04:44,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 298 transitions, 2656 flow [2023-11-23 15:04:44,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 298 transitions, 2581 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-23 15:04:44,547 INFO L231 Difference]: Finished difference. Result has 114 places, 150 transitions, 1797 flow [2023-11-23 15:04:44,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1797, PETRI_PLACES=114, PETRI_TRANSITIONS=150} [2023-11-23 15:04:44,548 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 75 predicate places. [2023-11-23 15:04:44,548 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 150 transitions, 1797 flow [2023-11-23 15:04:44,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:44,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:44,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:44,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 15:04:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:44,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:44,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1582894396, now seen corresponding path program 6 times [2023-11-23 15:04:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042428471] [2023-11-23 15:04:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:45,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:45,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042428471] [2023-11-23 15:04:45,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042428471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:45,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931661151] [2023-11-23 15:04:45,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 15:04:45,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:45,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:45,246 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) [2023-11-23 15:04:45,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 15:04:45,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-23 15:04:45,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:04:45,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 15:04:45,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:45,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:04:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931661151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:45,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:04:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2023-11-23 15:04:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057163418] [2023-11-23 15:04:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:45,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:04:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:04:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:04:45,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:45,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 150 transitions, 1797 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:45,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:45,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:45,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:47,231 INFO L124 PetriNetUnfolderBase]: 13112/19107 cut-off events. [2023-11-23 15:04:47,231 INFO L125 PetriNetUnfolderBase]: For 75499/75499 co-relation queries the response was YES. [2023-11-23 15:04:47,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61856 conditions, 19107 events. 13112/19107 cut-off events. For 75499/75499 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 116002 event pairs, 2900 based on Foata normal form. 3/18226 useless extension candidates. Maximal degree in co-relation 58634. Up to 6403 conditions per place. [2023-11-23 15:04:47,341 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 53 changer transitions 3/238 dead transitions. [2023-11-23 15:04:47,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 238 transitions, 2605 flow [2023-11-23 15:04:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:04:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 15:04:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2023-11-23 15:04:47,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-23 15:04:47,343 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 182 transitions. [2023-11-23 15:04:47,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 182 transitions. [2023-11-23 15:04:47,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:47,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 182 transitions. [2023-11-23 15:04:47,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:47,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:47,344 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:47,344 INFO L175 Difference]: Start difference. First operand has 114 places, 150 transitions, 1797 flow. Second operand 10 states and 182 transitions. [2023-11-23 15:04:47,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 238 transitions, 2605 flow [2023-11-23 15:04:47,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 238 transitions, 2536 flow, removed 27 selfloop flow, removed 2 redundant places. [2023-11-23 15:04:47,761 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1965 flow [2023-11-23 15:04:47,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1965, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2023-11-23 15:04:47,762 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 84 predicate places. [2023-11-23 15:04:47,762 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1965 flow [2023-11-23 15:04:47,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:47,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:47,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:47,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 15:04:47,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:47,975 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:47,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1213754326, now seen corresponding path program 1 times [2023-11-23 15:04:47,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:47,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078301482] [2023-11-23 15:04:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:47,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:48,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:48,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078301482] [2023-11-23 15:04:48,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078301482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:48,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335418827] [2023-11-23 15:04:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:48,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:48,101 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) [2023-11-23 15:04:48,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 15:04:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:48,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 15:04:48,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:48,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:04:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:48,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335418827] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:48,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:04:48,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-11-23 15:04:48,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454531032] [2023-11-23 15:04:48,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:48,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:04:48,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:48,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:04:48,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:04:48,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:48,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1965 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:48,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:48,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:48,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:50,535 INFO L124 PetriNetUnfolderBase]: 13112/19095 cut-off events. [2023-11-23 15:04:50,535 INFO L125 PetriNetUnfolderBase]: For 88688/88688 co-relation queries the response was YES. [2023-11-23 15:04:50,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63013 conditions, 19095 events. 13112/19095 cut-off events. For 88688/88688 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 115855 event pairs, 6947 based on Foata normal form. 6/18217 useless extension candidates. Maximal degree in co-relation 59848. Up to 7496 conditions per place. [2023-11-23 15:04:50,625 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 204 selfloop transitions, 40 changer transitions 8/253 dead transitions. [2023-11-23 15:04:50,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 253 transitions, 3113 flow [2023-11-23 15:04:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 15:04:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 15:04:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2023-11-23 15:04:50,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-23 15:04:50,627 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 150 transitions. [2023-11-23 15:04:50,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 150 transitions. [2023-11-23 15:04:50,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:50,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 150 transitions. [2023-11-23 15:04:50,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 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) [2023-11-23 15:04:50,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:50,628 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:50,628 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1965 flow. Second operand 7 states and 150 transitions. [2023-11-23 15:04:50,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 253 transitions, 3113 flow [2023-11-23 15:04:51,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 253 transitions, 2989 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-11-23 15:04:51,115 INFO L231 Difference]: Finished difference. Result has 125 places, 172 transitions, 2265 flow [2023-11-23 15:04:51,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=125, PETRI_TRANSITIONS=172} [2023-11-23 15:04:51,116 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 86 predicate places. [2023-11-23 15:04:51,116 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 172 transitions, 2265 flow [2023-11-23 15:04:51,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:51,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:51,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:51,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 15:04:51,329 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,SelfDestructingSolverStorable11 [2023-11-23 15:04:51,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:51,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:51,330 INFO L85 PathProgramCache]: Analyzing trace with hash -675002248, now seen corresponding path program 1 times [2023-11-23 15:04:51,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:51,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932862605] [2023-11-23 15:04:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:51,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:51,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:51,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932862605] [2023-11-23 15:04:51,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932862605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:51,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:04:51,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 15:04:51,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842859814] [2023-11-23 15:04:51,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:51,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:04:51,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:51,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:04:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:04:51,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:51,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 172 transitions, 2265 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:51,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:51,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:51,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:53,151 INFO L124 PetriNetUnfolderBase]: 11429/16742 cut-off events. [2023-11-23 15:04:53,151 INFO L125 PetriNetUnfolderBase]: For 80003/80003 co-relation queries the response was YES. [2023-11-23 15:04:53,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55814 conditions, 16742 events. 11429/16742 cut-off events. For 80003/80003 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 100816 event pairs, 7211 based on Foata normal form. 0/16130 useless extension candidates. Maximal degree in co-relation 53506. Up to 13329 conditions per place. [2023-11-23 15:04:53,234 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 131 selfloop transitions, 2 changer transitions 69/203 dead transitions. [2023-11-23 15:04:53,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 203 transitions, 2736 flow [2023-11-23 15:04:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:04:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:04:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2023-11-23 15:04:53,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2023-11-23 15:04:53,236 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 101 transitions. [2023-11-23 15:04:53,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 101 transitions. [2023-11-23 15:04:53,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:53,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 101 transitions. [2023-11-23 15:04:53,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 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) [2023-11-23 15:04:53,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:53,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:53,238 INFO L175 Difference]: Start difference. First operand has 125 places, 172 transitions, 2265 flow. Second operand 5 states and 101 transitions. [2023-11-23 15:04:53,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 203 transitions, 2736 flow [2023-11-23 15:04:53,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 203 transitions, 2706 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-23 15:04:53,566 INFO L231 Difference]: Finished difference. Result has 126 places, 134 transitions, 1682 flow [2023-11-23 15:04:53,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1682, PETRI_PLACES=126, PETRI_TRANSITIONS=134} [2023-11-23 15:04:53,567 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 87 predicate places. [2023-11-23 15:04:53,568 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 134 transitions, 1682 flow [2023-11-23 15:04:53,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:53,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:53,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:53,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 15:04:53,569 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:53,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash -842620708, now seen corresponding path program 1 times [2023-11-23 15:04:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:53,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381815380] [2023-11-23 15:04:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:53,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:53,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381815380] [2023-11-23 15:04:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381815380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041162860] [2023-11-23 15:04:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:53,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:53,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:53,691 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) [2023-11-23 15:04:53,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 15:04:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:53,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 15:04:53,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:53,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:04:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:04:53,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041162860] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:53,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:04:53,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2023-11-23 15:04:53,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936156728] [2023-11-23 15:04:53,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:53,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:04:53,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:04:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:04:53,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:53,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 134 transitions, 1682 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2023-11-23 15:04:53,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:53,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:53,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:55,448 INFO L124 PetriNetUnfolderBase]: 10219/14651 cut-off events. [2023-11-23 15:04:55,448 INFO L125 PetriNetUnfolderBase]: For 67916/67916 co-relation queries the response was YES. [2023-11-23 15:04:55,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49966 conditions, 14651 events. 10219/14651 cut-off events. For 67916/67916 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 82728 event pairs, 5359 based on Foata normal form. 154/14802 useless extension candidates. Maximal degree in co-relation 49912. Up to 6443 conditions per place. [2023-11-23 15:04:55,586 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 220 selfloop transitions, 12 changer transitions 7/240 dead transitions. [2023-11-23 15:04:55,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 240 transitions, 3041 flow [2023-11-23 15:04:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 15:04:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 15:04:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2023-11-23 15:04:55,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-23 15:04:55,601 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 147 transitions. [2023-11-23 15:04:55,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 147 transitions. [2023-11-23 15:04:55,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:55,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 147 transitions. [2023-11-23 15:04:55,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.375) internal successors, (147), 8 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) [2023-11-23 15:04:55,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:55,602 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:55,602 INFO L175 Difference]: Start difference. First operand has 126 places, 134 transitions, 1682 flow. Second operand 8 states and 147 transitions. [2023-11-23 15:04:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 240 transitions, 3041 flow [2023-11-23 15:04:55,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 240 transitions, 2821 flow, removed 51 selfloop flow, removed 13 redundant places. [2023-11-23 15:04:55,843 INFO L231 Difference]: Finished difference. Result has 113 places, 137 transitions, 1552 flow [2023-11-23 15:04:55,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1552, PETRI_PLACES=113, PETRI_TRANSITIONS=137} [2023-11-23 15:04:55,844 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 74 predicate places. [2023-11-23 15:04:55,844 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 137 transitions, 1552 flow [2023-11-23 15:04:55,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2023-11-23 15:04:55,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:55,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:55,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 15:04:56,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 15:04:56,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:56,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1176452062, now seen corresponding path program 1 times [2023-11-23 15:04:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:56,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474780386] [2023-11-23 15:04:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:56,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:56,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474780386] [2023-11-23 15:04:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474780386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:56,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:04:56,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 15:04:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853943540] [2023-11-23 15:04:56,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:04:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:04:56,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:04:56,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:56,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 137 transitions, 1552 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:56,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:56,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:56,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:57,045 INFO L124 PetriNetUnfolderBase]: 7293/10667 cut-off events. [2023-11-23 15:04:57,045 INFO L125 PetriNetUnfolderBase]: For 40693/40693 co-relation queries the response was YES. [2023-11-23 15:04:57,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34019 conditions, 10667 events. 7293/10667 cut-off events. For 40693/40693 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 59591 event pairs, 3471 based on Foata normal form. 452/10488 useless extension candidates. Maximal degree in co-relation 33962. Up to 5554 conditions per place. [2023-11-23 15:04:57,090 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 53 selfloop transitions, 2 changer transitions 86/142 dead transitions. [2023-11-23 15:04:57,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1573 flow [2023-11-23 15:04:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:04:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 15:04:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2023-11-23 15:04:57,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-23 15:04:57,091 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 105 transitions. [2023-11-23 15:04:57,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 105 transitions. [2023-11-23 15:04:57,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:57,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 105 transitions. [2023-11-23 15:04:57,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,093 INFO L175 Difference]: Start difference. First operand has 113 places, 137 transitions, 1552 flow. Second operand 6 states and 105 transitions. [2023-11-23 15:04:57,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1573 flow [2023-11-23 15:04:57,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 142 transitions, 1536 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-23 15:04:57,230 INFO L231 Difference]: Finished difference. Result has 109 places, 56 transitions, 337 flow [2023-11-23 15:04:57,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=109, PETRI_TRANSITIONS=56} [2023-11-23 15:04:57,231 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 70 predicate places. [2023-11-23 15:04:57,231 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 56 transitions, 337 flow [2023-11-23 15:04:57,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:57,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:57,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 15:04:57,232 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:57,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1653260040, now seen corresponding path program 1 times [2023-11-23 15:04:57,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:57,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448183224] [2023-11-23 15:04:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:57,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 15:04:57,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448183224] [2023-11-23 15:04:57,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448183224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:04:57,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:04:57,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 15:04:57,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951031183] [2023-11-23 15:04:57,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:04:57,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:04:57,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:57,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:04:57,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:04:57,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:57,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 56 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:57,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:57,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:57,796 INFO L124 PetriNetUnfolderBase]: 3384/4674 cut-off events. [2023-11-23 15:04:57,797 INFO L125 PetriNetUnfolderBase]: For 11236/11236 co-relation queries the response was YES. [2023-11-23 15:04:57,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14826 conditions, 4674 events. 3384/4674 cut-off events. For 11236/11236 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19919 event pairs, 1692 based on Foata normal form. 2/4422 useless extension candidates. Maximal degree in co-relation 14794. Up to 3021 conditions per place. [2023-11-23 15:04:57,818 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 69 selfloop transitions, 3 changer transitions 29/102 dead transitions. [2023-11-23 15:04:57,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 765 flow [2023-11-23 15:04:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:04:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:04:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2023-11-23 15:04:57,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-11-23 15:04:57,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 94 transitions. [2023-11-23 15:04:57,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 94 transitions. [2023-11-23 15:04:57,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:57,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 94 transitions. [2023-11-23 15:04:57,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,821 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,822 INFO L175 Difference]: Start difference. First operand has 109 places, 56 transitions, 337 flow. Second operand 4 states and 94 transitions. [2023-11-23 15:04:57,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 765 flow [2023-11-23 15:04:57,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 656 flow, removed 47 selfloop flow, removed 15 redundant places. [2023-11-23 15:04:57,842 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 244 flow [2023-11-23 15:04:57,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-11-23 15:04:57,843 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-11-23 15:04:57,843 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 244 flow [2023-11-23 15:04:57,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:57,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:57,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:57,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 15:04:57,844 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:57,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:57,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1446056824, now seen corresponding path program 1 times [2023-11-23 15:04:57,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:57,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906823964] [2023-11-23 15:04:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:57,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:58,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:04:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906823964] [2023-11-23 15:04:58,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906823964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:04:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818414637] [2023-11-23 15:04:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:58,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:04:58,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:04:58,054 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) [2023-11-23 15:04:58,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 15:04:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:04:58,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 15:04:58,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:04:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:58,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:04:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:04:58,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818414637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:04:58,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:04:58,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-11-23 15:04:58,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989048891] [2023-11-23 15:04:58,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:04:58,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 15:04:58,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:04:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 15:04:58,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-23 15:04:58,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:04:58,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 244 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:58,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:04:58,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:04:58,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:04:59,536 INFO L124 PetriNetUnfolderBase]: 7003/9676 cut-off events. [2023-11-23 15:04:59,536 INFO L125 PetriNetUnfolderBase]: For 12137/12137 co-relation queries the response was YES. [2023-11-23 15:04:59,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27687 conditions, 9676 events. 7003/9676 cut-off events. For 12137/12137 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 47155 event pairs, 1616 based on Foata normal form. 1/8652 useless extension candidates. Maximal degree in co-relation 27664. Up to 3740 conditions per place. [2023-11-23 15:04:59,578 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 139 selfloop transitions, 22 changer transitions 1/163 dead transitions. [2023-11-23 15:04:59,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 163 transitions, 1015 flow [2023-11-23 15:04:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 15:04:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 15:04:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2023-11-23 15:04:59,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2023-11-23 15:04:59,579 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 192 transitions. [2023-11-23 15:04:59,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 192 transitions. [2023-11-23 15:04:59,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:04:59,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 192 transitions. [2023-11-23 15:04:59,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 16.0) internal successors, (192), 12 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) [2023-11-23 15:04:59,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 42.0) internal successors, (546), 13 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:59,581 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 42.0) internal successors, (546), 13 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:59,581 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 244 flow. Second operand 12 states and 192 transitions. [2023-11-23 15:04:59,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 163 transitions, 1015 flow [2023-11-23 15:04:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 163 transitions, 970 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-23 15:04:59,598 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 429 flow [2023-11-23 15:04:59,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=429, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2023-11-23 15:04:59,599 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2023-11-23 15:04:59,599 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 429 flow [2023-11-23 15:04:59,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:04:59,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:04:59,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:04:59,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 15:04:59,808 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,SelfDestructingSolverStorable16 [2023-11-23 15:04:59,809 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:04:59,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:04:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 589652670, now seen corresponding path program 2 times [2023-11-23 15:04:59,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:04:59,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158526844] [2023-11-23 15:04:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:04:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:04:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:05:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 15:05:00,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:05:00,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158526844] [2023-11-23 15:05:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158526844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:05:00,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033629849] [2023-11-23 15:05:00,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:05:00,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:05:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:05:00,036 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) [2023-11-23 15:05:00,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 15:05:00,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 15:05:00,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:05:00,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 15:05:00,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:05:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 15:05:00,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:05:00,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033629849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:05:00,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:05:00,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2023-11-23 15:05:00,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687588533] [2023-11-23 15:05:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:05:00,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:05:00,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:05:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:05:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-23 15:05:00,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:05:00,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:00,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:05:00,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:05:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:05:01,193 INFO L124 PetriNetUnfolderBase]: 7003/9674 cut-off events. [2023-11-23 15:05:01,193 INFO L125 PetriNetUnfolderBase]: For 18517/18517 co-relation queries the response was YES. [2023-11-23 15:05:01,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28594 conditions, 9674 events. 7003/9674 cut-off events. For 18517/18517 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 46776 event pairs, 1720 based on Foata normal form. 1/8651 useless extension candidates. Maximal degree in co-relation 28568. Up to 3740 conditions per place. [2023-11-23 15:05:01,276 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 20 changer transitions 1/164 dead transitions. [2023-11-23 15:05:01,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 164 transitions, 1121 flow [2023-11-23 15:05:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:05:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 15:05:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2023-11-23 15:05:01,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2023-11-23 15:05:01,277 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 181 transitions. [2023-11-23 15:05:01,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 181 transitions. [2023-11-23 15:05:01,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:05:01,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 181 transitions. [2023-11-23 15:05:01,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:01,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:01,280 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:01,280 INFO L175 Difference]: Start difference. First operand has 78 places, 65 transitions, 429 flow. Second operand 10 states and 181 transitions. [2023-11-23 15:05:01,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 164 transitions, 1121 flow [2023-11-23 15:05:01,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 164 transitions, 1094 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-23 15:05:01,326 INFO L231 Difference]: Finished difference. Result has 87 places, 71 transitions, 538 flow [2023-11-23 15:05:01,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=538, PETRI_PLACES=87, PETRI_TRANSITIONS=71} [2023-11-23 15:05:01,326 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 48 predicate places. [2023-11-23 15:05:01,327 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 71 transitions, 538 flow [2023-11-23 15:05:01,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:01,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:05:01,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:05:01,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-23 15:05:01,541 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,SelfDestructingSolverStorable17 [2023-11-23 15:05:01,542 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:05:01,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:05:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash -441475722, now seen corresponding path program 3 times [2023-11-23 15:05:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:05:01,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727892307] [2023-11-23 15:05:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:05:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:05:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:05:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:05:01,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:05:01,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727892307] [2023-11-23 15:05:01,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727892307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:05:01,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798006528] [2023-11-23 15:05:01,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 15:05:01,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:05:01,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:05:01,798 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) [2023-11-23 15:05:01,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 15:05:01,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 15:05:01,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:05:01,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 15:05:01,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:05:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 15:05:02,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:05:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798006528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:05:02,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:05:02,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2023-11-23 15:05:02,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210043389] [2023-11-23 15:05:02,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:05:02,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:05:02,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:05:02,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:05:02,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-23 15:05:02,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:05:02,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 71 transitions, 538 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:02,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:05:02,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:05:02,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:05:02,928 INFO L124 PetriNetUnfolderBase]: 7649/10665 cut-off events. [2023-11-23 15:05:02,929 INFO L125 PetriNetUnfolderBase]: For 25445/25445 co-relation queries the response was YES. [2023-11-23 15:05:03,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32189 conditions, 10665 events. 7649/10665 cut-off events. For 25445/25445 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 53383 event pairs, 2012 based on Foata normal form. 1/9587 useless extension candidates. Maximal degree in co-relation 32160. Up to 3740 conditions per place. [2023-11-23 15:05:03,039 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 26 changer transitions 1/181 dead transitions. [2023-11-23 15:05:03,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 181 transitions, 1346 flow [2023-11-23 15:05:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 15:05:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 15:05:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2023-11-23 15:05:03,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-23 15:05:03,040 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 189 transitions. [2023-11-23 15:05:03,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 189 transitions. [2023-11-23 15:05:03,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:05:03,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 189 transitions. [2023-11-23 15:05:03,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.9) internal successors, (189), 10 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) [2023-11-23 15:05:03,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:03,042 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:03,042 INFO L175 Difference]: Start difference. First operand has 87 places, 71 transitions, 538 flow. Second operand 10 states and 189 transitions. [2023-11-23 15:05:03,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 181 transitions, 1346 flow [2023-11-23 15:05:03,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 181 transitions, 1290 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-11-23 15:05:03,099 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 691 flow [2023-11-23 15:05:03,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=691, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2023-11-23 15:05:03,100 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 55 predicate places. [2023-11-23 15:05:03,101 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 691 flow [2023-11-23 15:05:03,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:03,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:05:03,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:05:03,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 15:05:03,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:05:03,302 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:05:03,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:05:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash 227247490, now seen corresponding path program 4 times [2023-11-23 15:05:03,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:05:03,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800982770] [2023-11-23 15:05:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:05:03,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:05:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:05:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:05:03,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:05:03,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800982770] [2023-11-23 15:05:03,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800982770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:05:03,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96880090] [2023-11-23 15:05:03,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 15:05:03,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:05:03,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:05:03,562 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) [2023-11-23 15:05:03,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 15:05:03,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 15:05:03,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:05:03,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 15:05:03,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:05:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 15:05:03,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:05:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 15:05:04,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96880090] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 15:05:04,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:05:04,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2023-11-23 15:05:04,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182115346] [2023-11-23 15:05:04,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:05:04,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:05:04,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:05:04,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:05:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-23 15:05:04,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:05:04,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 691 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:04,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:05:04,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:05:04,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:05:06,080 INFO L124 PetriNetUnfolderBase]: 17064/24443 cut-off events. [2023-11-23 15:05:06,081 INFO L125 PetriNetUnfolderBase]: For 54624/54624 co-relation queries the response was YES. [2023-11-23 15:05:06,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69904 conditions, 24443 events. 17064/24443 cut-off events. For 54624/54624 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 147398 event pairs, 1536 based on Foata normal form. 2/21586 useless extension candidates. Maximal degree in co-relation 69872. Up to 7833 conditions per place. [2023-11-23 15:05:06,251 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 90 changer transitions 3/293 dead transitions. [2023-11-23 15:05:06,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 293 transitions, 2653 flow [2023-11-23 15:05:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 15:05:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 15:05:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2023-11-23 15:05:06,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2023-11-23 15:05:06,253 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 234 transitions. [2023-11-23 15:05:06,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 234 transitions. [2023-11-23 15:05:06,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:05:06,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 234 transitions. [2023-11-23 15:05:06,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 21.272727272727273) internal successors, (234), 11 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:06,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 42.0) internal successors, (504), 12 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:06,255 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 42.0) internal successors, (504), 12 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:06,255 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 691 flow. Second operand 11 states and 234 transitions. [2023-11-23 15:05:06,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 293 transitions, 2653 flow [2023-11-23 15:05:06,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 293 transitions, 2547 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-11-23 15:05:06,407 INFO L231 Difference]: Finished difference. Result has 108 places, 156 transitions, 1868 flow [2023-11-23 15:05:06,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1868, PETRI_PLACES=108, PETRI_TRANSITIONS=156} [2023-11-23 15:05:06,408 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 69 predicate places. [2023-11-23 15:05:06,409 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 156 transitions, 1868 flow [2023-11-23 15:05:06,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:06,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:05:06,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:05:06,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 15:05:06,620 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,SelfDestructingSolverStorable19 [2023-11-23 15:05:06,620 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 15:05:06,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:05:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1921674116, now seen corresponding path program 5 times [2023-11-23 15:05:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:05:06,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421437317] [2023-11-23 15:05:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:05:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:05:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:05:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:05:06,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:05:06,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421437317] [2023-11-23 15:05:06,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421437317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:05:06,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679888136] [2023-11-23 15:05:06,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 15:05:06,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:05:06,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:05:06,874 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) [2023-11-23 15:05:06,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 15:05:06,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:05:06,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:05:07,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 15:05:07,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:05:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 15:05:07,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:05:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 15:05:07,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679888136] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 15:05:07,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 15:05:07,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 22 [2023-11-23 15:05:07,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688288130] [2023-11-23 15:05:07,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:05:07,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:05:07,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:05:07,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:05:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-23 15:05:07,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-23 15:05:07,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 156 transitions, 1868 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:05:07,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:05:07,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-23 15:05:07,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand