./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:21:22,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:21:22,443 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:21:22,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:21:22,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:21:22,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:21:22,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:21:22,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:21:22,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:21:22,501 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:21:22,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:21:22,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:21:22,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:21:22,504 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:21:22,504 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:21:22,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:21:22,504 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:21:22,505 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:21:22,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:21:22,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:21:22,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:21:22,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:21:22,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:21:22,506 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:21:22,506 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:21:22,507 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:21:22,507 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:21:22,507 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:21:22,508 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:21:22,509 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:21:22,509 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:21:22,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:21:22,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:21:22,510 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:21:22,510 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:21:22,510 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:21:22,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:21:22,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:21:22,511 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:21:22,511 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:21:22,511 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:21:22,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:21:22,512 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:21:22,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:21:22,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:21:22,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:21:22,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:21:22,751 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:21:22,751 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:21:22,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2024-02-20 12:21:24,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:21:24,338 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:21:24,339 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2024-02-20 12:21:24,347 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49dc66ae/0f492adfed494398bc09e40a80e35a6d/FLAG17036ed79 [2024-02-20 12:21:24,361 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49dc66ae/0f492adfed494398bc09e40a80e35a6d [2024-02-20 12:21:24,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:21:24,368 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:21:24,370 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:21:24,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:21:24,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:21:24,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658a04e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24, skipping insertion in model container [2024-02-20 12:21:24,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:21:24,595 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2024-02-20 12:21:24,611 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:21:24,621 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:21:24,647 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2024-02-20 12:21:24,653 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:21:24,669 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:21:24,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24 WrapperNode [2024-02-20 12:21:24,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:21:24,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:21:24,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:21:24,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:21:24,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,695 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,713 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2024-02-20 12:21:24,714 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:21:24,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:21:24,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:21:24,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:21:24,723 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,725 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,737 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 2, 7]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-20 12:21:24,737 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,738 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,746 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,747 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,748 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,750 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:21:24,751 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:21:24,751 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:21:24,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:21:24,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (1/1) ... [2024-02-20 12:21:24,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:21:24,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:21:24,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 12:21:24,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 12:21:24,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:21:24,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:21:24,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:21:24,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:21:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:21:24,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-20 12:21:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-20 12:21:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:21:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:21:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:21:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 12:21:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 12:21:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:21:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:21:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:21:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:21:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 12:21:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 12:21:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:21:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:21:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-20 12:21:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:21:24,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:21:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:21:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:21:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:21:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 12:21:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-20 12:21:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:21:24,876 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:21:25,068 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:21:25,071 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:21:25,311 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:21:25,312 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:21:25,488 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:21:25,489 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-20 12:21:25,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:21:25 BoogieIcfgContainer [2024-02-20 12:21:25,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:21:25,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:21:25,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:21:25,493 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:21:25,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:21:24" (1/3) ... [2024-02-20 12:21:25,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d283a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:21:25, skipping insertion in model container [2024-02-20 12:21:25,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:21:24" (2/3) ... [2024-02-20 12:21:25,495 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d283a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:21:25, skipping insertion in model container [2024-02-20 12:21:25,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:21:25" (3/3) ... [2024-02-20 12:21:25,496 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2024-02-20 12:21:25,510 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:21:25,511 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:21:25,511 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:21:25,560 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-20 12:21:25,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2024-02-20 12:21:25,656 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-02-20 12:21:25,657 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-20 12:21:25,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-02-20 12:21:25,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2024-02-20 12:21:25,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2024-02-20 12:21:25,670 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:21:25,675 INFO L369 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=All, 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;@46a99be7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:21:25,676 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-20 12:21:25,684 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:21:25,685 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-02-20 12:21:25,685 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-20 12:21:25,685 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:21:25,686 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:21:25,686 INFO L432 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)] === [2024-02-20 12:21:25,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:21:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1736156699, now seen corresponding path program 1 times [2024-02-20 12:21:25,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:21:25,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539748801] [2024-02-20 12:21:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:21:25,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:21:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:21:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:25,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:21:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539748801] [2024-02-20 12:21:25,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539748801] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:21:25,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:21:25,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:21:26,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866672500] [2024-02-20 12:21:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:21:26,008 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:21:26,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:21:26,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:21:26,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:21:26,037 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2024-02-20 12:21:26,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 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) [2024-02-20 12:21:26,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:21:26,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2024-02-20 12:21:26,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:21:26,205 INFO L124 PetriNetUnfolderBase]: 551/850 cut-off events. [2024-02-20 12:21:26,205 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-02-20 12:21:26,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1669 conditions, 850 events. 551/850 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3819 event pairs, 299 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 1362. Up to 751 conditions per place. [2024-02-20 12:21:26,218 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 23 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-02-20 12:21:26,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 132 flow [2024-02-20 12:21:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:21:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:21:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-02-20 12:21:26,228 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-02-20 12:21:26,232 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2024-02-20 12:21:26,232 INFO L507 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 132 flow [2024-02-20 12:21:26,233 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 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) [2024-02-20 12:21:26,233 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:21:26,233 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:21:26,234 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:21:26,234 INFO L432 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)] === [2024-02-20 12:21:26,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:21:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash -412355212, now seen corresponding path program 1 times [2024-02-20 12:21:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:21:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409530937] [2024-02-20 12:21:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:21:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:21:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:21:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:26,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:21:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409530937] [2024-02-20 12:21:26,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409530937] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:21:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807864325] [2024-02-20 12:21:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:21:26,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:21:26,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:21:26,401 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:21:26,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:21:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:21:26,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:21:26,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:21:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:26,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:21:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:26,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807864325] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 12:21:26,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 12:21:26,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-02-20 12:21:26,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279248611] [2024-02-20 12:21:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:21:26,571 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:21:26,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:21:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:21:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-02-20 12:21:26,578 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-20 12:21:26,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:21:26,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:21:26,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-20 12:21:26,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:21:26,720 INFO L124 PetriNetUnfolderBase]: 754/1145 cut-off events. [2024-02-20 12:21:26,721 INFO L125 PetriNetUnfolderBase]: For 217/265 co-relation queries the response was YES. [2024-02-20 12:21:26,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 1145 events. 754/1145 cut-off events. For 217/265 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5012 event pairs, 239 based on Foata normal form. 42/1168 useless extension candidates. Maximal degree in co-relation 2886. Up to 925 conditions per place. [2024-02-20 12:21:26,729 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 34 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-02-20 12:21:26,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 262 flow [2024-02-20 12:21:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:21:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:21:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-02-20 12:21:26,731 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-02-20 12:21:26,732 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2024-02-20 12:21:26,732 INFO L507 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 262 flow [2024-02-20 12:21:26,732 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:21:26,732 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:21:26,732 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:21:26,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:21:26,946 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:21:26,947 INFO L432 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)] === [2024-02-20 12:21:26,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:21:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -220245529, now seen corresponding path program 1 times [2024-02-20 12:21:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:21:26,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330092579] [2024-02-20 12:21:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:21:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:21:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:21:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:21:27,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:21:27,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330092579] [2024-02-20 12:21:27,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330092579] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:21:27,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:21:27,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 12:21:27,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768049121] [2024-02-20 12:21:27,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:21:27,028 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:21:27,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:21:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:21:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:21:27,034 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-20 12:21:27,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:21:27,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:21:27,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-20 12:21:27,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:21:27,215 INFO L124 PetriNetUnfolderBase]: 998/1446 cut-off events. [2024-02-20 12:21:27,216 INFO L125 PetriNetUnfolderBase]: For 1305/1335 co-relation queries the response was YES. [2024-02-20 12:21:27,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5179 conditions, 1446 events. 998/1446 cut-off events. For 1305/1335 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6210 event pairs, 208 based on Foata normal form. 66/1499 useless extension candidates. Maximal degree in co-relation 4516. Up to 1113 conditions per place. [2024-02-20 12:21:27,228 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 49 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-02-20 12:21:27,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 468 flow [2024-02-20 12:21:27,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:21:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:21:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-02-20 12:21:27,231 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-02-20 12:21:27,232 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2024-02-20 12:21:27,232 INFO L507 AbstractCegarLoop]: Abstraction has has 46 places, 60 transitions, 468 flow [2024-02-20 12:21:27,232 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:21:27,232 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:21:27,233 INFO L234 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] [2024-02-20 12:21:27,233 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 12:21:27,233 INFO L432 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)] === [2024-02-20 12:21:27,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:21:27,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1693914698, now seen corresponding path program 1 times [2024-02-20 12:21:27,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:21:27,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433483339] [2024-02-20 12:21:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:21:27,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:21:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:21:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:28,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:21:28,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433483339] [2024-02-20 12:21:28,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433483339] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:21:28,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667176564] [2024-02-20 12:21:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:21:28,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:21:28,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:21:28,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:21:28,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:21:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:21:28,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2024-02-20 12:21:28,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:21:28,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:21:28,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2024-02-20 12:21:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:28,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:21:29,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-02-20 12:21:30,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:21:30,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-02-20 12:21:47,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 207 [2024-02-20 12:21:47,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:21:47,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 290 [2024-02-20 12:21:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:56,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667176564] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:21:56,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:21:56,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-02-20 12:21:56,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416827458] [2024-02-20 12:21:56,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:21:56,297 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 12:21:56,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:21:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 12:21:56,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2024-02-20 12:21:56,516 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 12:21:56,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 60 transitions, 468 flow. Second operand has 24 states, 24 states have (on average 9.75) internal successors, (234), 24 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) [2024-02-20 12:21:56,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:21:56,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 12:21:56,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:21:58,131 INFO L124 PetriNetUnfolderBase]: 1843/2673 cut-off events. [2024-02-20 12:21:58,132 INFO L125 PetriNetUnfolderBase]: For 3323/3383 co-relation queries the response was YES. [2024-02-20 12:21:58,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12225 conditions, 2673 events. 1843/2673 cut-off events. For 3323/3383 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12594 event pairs, 95 based on Foata normal form. 10/2675 useless extension candidates. Maximal degree in co-relation 9775. Up to 2112 conditions per place. [2024-02-20 12:21:58,170 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 211 selfloop transitions, 79 changer transitions 2/297 dead transitions. [2024-02-20 12:21:58,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 297 transitions, 2977 flow [2024-02-20 12:21:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-20 12:21:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-20 12:21:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 305 transitions. [2024-02-20 12:21:58,177 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-02-20 12:21:58,179 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 26 predicate places. [2024-02-20 12:21:58,180 INFO L507 AbstractCegarLoop]: Abstraction has has 63 places, 297 transitions, 2977 flow [2024-02-20 12:21:58,180 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.75) internal successors, (234), 24 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) [2024-02-20 12:21:58,180 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:21:58,181 INFO L234 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] [2024-02-20 12:21:58,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-20 12:21:58,396 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-02-20 12:21:58,397 INFO L432 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)] === [2024-02-20 12:21:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:21:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash 316898878, now seen corresponding path program 2 times [2024-02-20 12:21:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:21:58,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379288629] [2024-02-20 12:21:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:21:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:21:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:21:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:59,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:21:59,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379288629] [2024-02-20 12:21:59,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379288629] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:21:59,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628304214] [2024-02-20 12:21:59,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:21:59,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:21:59,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:21:59,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:21:59,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:21:59,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:21:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:21:59,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-20 12:21:59,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:21:59,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:21:59,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2024-02-20 12:21:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:21:59,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:22:01,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2024-02-20 12:22:01,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:22:01,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 218 [2024-02-20 12:22:05,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-02-20 12:22:05,233 INFO L349 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2024-02-20 12:22:05,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 258 [2024-02-20 12:22:05,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-02-20 12:22:05,482 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-02-20 12:22:05,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 115 [2024-02-20 12:22:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:05,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628304214] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:22:05,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:22:05,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-02-20 12:22:05,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185890861] [2024-02-20 12:22:05,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:22:05,901 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 12:22:05,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:22:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 12:22:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-02-20 12:22:06,179 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 12:22:06,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 297 transitions, 2977 flow. Second operand has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 26 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:22:06,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:22:06,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 12:22:06,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:22:08,259 INFO L124 PetriNetUnfolderBase]: 2385/3448 cut-off events. [2024-02-20 12:22:08,260 INFO L125 PetriNetUnfolderBase]: For 5352/5416 co-relation queries the response was YES. [2024-02-20 12:22:08,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19117 conditions, 3448 events. 2385/3448 cut-off events. For 5352/5416 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16865 event pairs, 106 based on Foata normal form. 9/3433 useless extension candidates. Maximal degree in co-relation 15958. Up to 2791 conditions per place. [2024-02-20 12:22:08,301 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 304 selfloop transitions, 110 changer transitions 3/422 dead transitions. [2024-02-20 12:22:08,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 422 transitions, 5063 flow [2024-02-20 12:22:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 12:22:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 12:22:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 302 transitions. [2024-02-20 12:22:08,304 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45413533834586467 [2024-02-20 12:22:08,304 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2024-02-20 12:22:08,305 INFO L507 AbstractCegarLoop]: Abstraction has has 81 places, 422 transitions, 5063 flow [2024-02-20 12:22:08,305 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 26 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:22:08,305 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:22:08,305 INFO L234 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] [2024-02-20 12:22:08,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-20 12:22:08,520 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:22:08,521 INFO L432 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)] === [2024-02-20 12:22:08,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:22:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash 961640770, now seen corresponding path program 3 times [2024-02-20 12:22:08,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:22:08,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984182787] [2024-02-20 12:22:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:22:08,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:22:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:22:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:09,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:22:09,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984182787] [2024-02-20 12:22:09,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984182787] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:22:09,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981847095] [2024-02-20 12:22:09,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:22:09,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:22:09,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:22:09,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:22:09,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:22:09,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 12:22:09,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:22:09,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2024-02-20 12:22:09,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:22:09,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:22:09,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:22:09,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2024-02-20 12:22:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:10,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:22:11,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 98 [2024-02-20 12:22:11,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 127 [2024-02-20 12:22:11,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 92 [2024-02-20 12:22:11,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 111 [2024-02-20 12:22:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:12,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981847095] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:22:12,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:22:12,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2024-02-20 12:22:12,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749559018] [2024-02-20 12:22:12,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:22:12,088 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:22:12,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:22:12,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:22:12,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:22:12,168 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-20 12:22:12,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 422 transitions, 5063 flow. Second operand has 29 states, 29 states have (on average 8.689655172413794) internal successors, (252), 29 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) [2024-02-20 12:22:12,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:22:12,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-20 12:22:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:22:16,136 INFO L124 PetriNetUnfolderBase]: 3895/5593 cut-off events. [2024-02-20 12:22:16,136 INFO L125 PetriNetUnfolderBase]: For 9526/9606 co-relation queries the response was YES. [2024-02-20 12:22:16,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36104 conditions, 5593 events. 3895/5593 cut-off events. For 9526/9606 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29480 event pairs, 70 based on Foata normal form. 9/5594 useless extension candidates. Maximal degree in co-relation 29294. Up to 4446 conditions per place. [2024-02-20 12:22:16,191 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 500 selfloop transitions, 281 changer transitions 4/788 dead transitions. [2024-02-20 12:22:16,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 788 transitions, 10845 flow [2024-02-20 12:22:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-20 12:22:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-20 12:22:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 526 transitions. [2024-02-20 12:22:16,194 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4061776061776062 [2024-02-20 12:22:16,194 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 80 predicate places. [2024-02-20 12:22:16,194 INFO L507 AbstractCegarLoop]: Abstraction has has 117 places, 788 transitions, 10845 flow [2024-02-20 12:22:16,195 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.689655172413794) internal successors, (252), 29 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) [2024-02-20 12:22:16,195 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:22:16,195 INFO L234 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] [2024-02-20 12:22:16,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-20 12:22:16,407 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:22:16,408 INFO L432 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)] === [2024-02-20 12:22:16,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:22:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash -843268896, now seen corresponding path program 4 times [2024-02-20 12:22:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:22:16,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174094409] [2024-02-20 12:22:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:22:16,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:22:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:22:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:16,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:22:16,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174094409] [2024-02-20 12:22:16,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174094409] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:22:16,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971336430] [2024-02-20 12:22:16,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:22:16,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:22:16,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:22:16,882 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:22:16,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:22:16,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:22:16,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:22:16,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-20 12:22:16,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:22:17,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2024-02-20 12:22:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:22:17,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:22:17,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:22:17,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 75 [2024-02-20 12:22:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:22:17,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971336430] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:22:17,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:22:17,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-02-20 12:22:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536732777] [2024-02-20 12:22:17,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:22:17,707 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 12:22:17,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:22:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 12:22:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-02-20 12:22:17,792 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-20 12:22:17,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 788 transitions, 10845 flow. Second operand has 25 states, 25 states have (on average 7.76) internal successors, (194), 25 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:22:17,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:22:17,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-20 12:22:17,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:22:20,700 INFO L124 PetriNetUnfolderBase]: 10123/14479 cut-off events. [2024-02-20 12:22:20,700 INFO L125 PetriNetUnfolderBase]: For 69448/69665 co-relation queries the response was YES. [2024-02-20 12:22:20,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101024 conditions, 14479 events. 10123/14479 cut-off events. For 69448/69665 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 81839 event pairs, 106 based on Foata normal form. 141/14591 useless extension candidates. Maximal degree in co-relation 71010. Up to 10641 conditions per place. [2024-02-20 12:22:20,816 INFO L140 encePairwiseOnDemand]: 18/35 looper letters, 1504 selfloop transitions, 616 changer transitions 6/2146 dead transitions. [2024-02-20 12:22:20,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 2146 transitions, 33610 flow [2024-02-20 12:22:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-02-20 12:22:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-02-20 12:22:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 576 transitions. [2024-02-20 12:22:20,819 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3657142857142857 [2024-02-20 12:22:20,819 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2024-02-20 12:22:20,819 INFO L507 AbstractCegarLoop]: Abstraction has has 161 places, 2146 transitions, 33610 flow [2024-02-20 12:22:20,819 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.76) internal successors, (194), 25 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:22:20,820 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:22:20,820 INFO L234 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] [2024-02-20 12:22:20,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 12:22:21,048 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:22:21,049 INFO L432 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)] === [2024-02-20 12:22:21,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:22:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash -120667762, now seen corresponding path program 5 times [2024-02-20 12:22:21,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:22:21,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45641079] [2024-02-20 12:22:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:22:21,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:22:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:22:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:21,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:22:21,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45641079] [2024-02-20 12:22:21,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45641079] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:22:21,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500973981] [2024-02-20 12:22:21,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:22:21,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:22:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:22:21,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:22:21,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:22:21,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:22:21,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:22:21,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-20 12:22:21,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:22:21,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:22:21,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2024-02-20 12:22:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:22,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:22:24,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-02-20 12:22:24,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:22:24,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-02-20 12:22:45,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 207 [2024-02-20 12:22:45,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:22:45,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 290 [2024-02-20 12:22:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:55,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500973981] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:22:55,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:22:55,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-02-20 12:22:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732025761] [2024-02-20 12:22:55,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:22:55,552 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 12:22:55,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:22:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 12:22:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-02-20 12:22:55,777 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 12:22:55,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 2146 transitions, 33610 flow. Second operand has 25 states, 25 states have (on average 9.96) internal successors, (249), 25 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:22:55,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:22:55,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 12:22:55,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:23:03,450 INFO L124 PetriNetUnfolderBase]: 11033/15833 cut-off events. [2024-02-20 12:23:03,451 INFO L125 PetriNetUnfolderBase]: For 103455/103639 co-relation queries the response was YES. [2024-02-20 12:23:03,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124334 conditions, 15833 events. 11033/15833 cut-off events. For 103455/103639 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 91542 event pairs, 110 based on Foata normal form. 134/15947 useless extension candidates. Maximal degree in co-relation 87836. Up to 11711 conditions per place. [2024-02-20 12:23:03,723 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 1977 selfloop transitions, 421 changer transitions 10/2451 dead transitions. [2024-02-20 12:23:03,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 2451 transitions, 43359 flow [2024-02-20 12:23:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 12:23:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 12:23:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 347 transitions. [2024-02-20 12:23:03,731 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45064935064935063 [2024-02-20 12:23:03,734 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 145 predicate places. [2024-02-20 12:23:03,735 INFO L507 AbstractCegarLoop]: Abstraction has has 182 places, 2451 transitions, 43359 flow [2024-02-20 12:23:03,735 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.96) internal successors, (249), 25 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:23:03,735 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:23:03,735 INFO L234 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] [2024-02-20 12:23:03,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 12:23:03,966 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:23:03,967 INFO L432 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)] === [2024-02-20 12:23:03,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:23:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 884877950, now seen corresponding path program 6 times [2024-02-20 12:23:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:23:03,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880245465] [2024-02-20 12:23:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:23:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:23:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:23:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:23:04,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:23:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880245465] [2024-02-20 12:23:04,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880245465] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:23:04,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092193919] [2024-02-20 12:23:04,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:23:04,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:23:04,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:23:04,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:23:04,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:23:04,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 12:23:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:23:04,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-20 12:23:04,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:23:04,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:23:04,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2024-02-20 12:23:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:23:04,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:23:07,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-02-20 12:23:07,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:23:07,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-02-20 12:23:28,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 207 [2024-02-20 12:23:28,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:23:28,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 290 [2024-02-20 12:23:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:23:32,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092193919] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:23:32,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:23:32,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-02-20 12:23:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172257164] [2024-02-20 12:23:32,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:23:32,806 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 12:23:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:23:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 12:23:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-02-20 12:23:32,975 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 12:23:32,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 2451 transitions, 43359 flow. Second operand has 21 states, 21 states have (on average 10.476190476190476) internal successors, (220), 21 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:23:32,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:23:32,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 12:23:32,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:23:39,850 INFO L124 PetriNetUnfolderBase]: 13011/18659 cut-off events. [2024-02-20 12:23:39,850 INFO L125 PetriNetUnfolderBase]: For 158902/159114 co-relation queries the response was YES. [2024-02-20 12:23:39,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162704 conditions, 18659 events. 13011/18659 cut-off events. For 158902/159114 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 110618 event pairs, 98 based on Foata normal form. 161/18800 useless extension candidates. Maximal degree in co-relation 107128. Up to 13886 conditions per place. [2024-02-20 12:23:40,309 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 2550 selfloop transitions, 358 changer transitions 12/2963 dead transitions. [2024-02-20 12:23:40,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 2963 transitions, 58412 flow [2024-02-20 12:23:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-20 12:23:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-20 12:23:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 281 transitions. [2024-02-20 12:23:40,311 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44603174603174606 [2024-02-20 12:23:40,312 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 162 predicate places. [2024-02-20 12:23:40,312 INFO L507 AbstractCegarLoop]: Abstraction has has 199 places, 2963 transitions, 58412 flow [2024-02-20 12:23:40,312 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.476190476190476) internal successors, (220), 21 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:23:40,313 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:23:40,313 INFO L234 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] [2024-02-20 12:23:40,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 12:23:40,529 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:23:40,529 INFO L432 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)] === [2024-02-20 12:23:40,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:23:40,530 INFO L85 PathProgramCache]: Analyzing trace with hash 550982102, now seen corresponding path program 7 times [2024-02-20 12:23:40,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:23:40,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064716634] [2024-02-20 12:23:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:23:40,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:23:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:23:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:23:41,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:23:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064716634] [2024-02-20 12:23:41,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064716634] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:23:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018091354] [2024-02-20 12:23:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:23:41,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:23:41,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:23:41,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:23:41,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 12:23:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:23:41,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2024-02-20 12:23:41,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:23:41,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:23:41,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2024-02-20 12:23:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:23:41,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:23:43,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-02-20 12:23:43,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:23:43,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 119 [2024-02-20 12:23:43,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-02-20 12:23:43,861 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-02-20 12:23:43,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-02-20 12:23:43,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2024-02-20 12:23:43,880 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-02-20 12:23:43,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 1 [2024-02-20 12:23:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:23:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018091354] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:23:43,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:23:43,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-02-20 12:23:43,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924247445] [2024-02-20 12:23:43,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:23:43,940 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 12:23:43,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:23:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 12:23:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-02-20 12:23:44,090 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-20 12:23:44,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 2963 transitions, 58412 flow. Second operand has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 26 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:23:44,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:23:44,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-20 12:23:44,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:23:53,521 INFO L124 PetriNetUnfolderBase]: 13604/19546 cut-off events. [2024-02-20 12:23:53,521 INFO L125 PetriNetUnfolderBase]: For 208425/208637 co-relation queries the response was YES. [2024-02-20 12:23:53,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187232 conditions, 19546 events. 13604/19546 cut-off events. For 208425/208637 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 116890 event pairs, 78 based on Foata normal form. 162/19688 useless extension candidates. Maximal degree in co-relation 119977. Up to 14557 conditions per place. [2024-02-20 12:23:53,749 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 2132 selfloop transitions, 939 changer transitions 16/3130 dead transitions. [2024-02-20 12:23:53,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 3130 transitions, 67927 flow [2024-02-20 12:23:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 12:23:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 12:23:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 349 transitions. [2024-02-20 12:23:53,751 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45324675324675323 [2024-02-20 12:23:53,752 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 183 predicate places. [2024-02-20 12:23:53,752 INFO L507 AbstractCegarLoop]: Abstraction has has 220 places, 3130 transitions, 67927 flow [2024-02-20 12:23:53,752 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 26 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:23:53,753 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:23:53,753 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:23:53,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-20 12:23:53,969 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-20 12:23:53,969 INFO L432 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)] === [2024-02-20 12:23:53,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:23:53,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1811811883, now seen corresponding path program 8 times [2024-02-20 12:23:53,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:23:53,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005933479] [2024-02-20 12:23:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:23:53,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:23:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:23:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:23:54,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:23:54,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005933479] [2024-02-20 12:23:54,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005933479] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:23:54,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081552954] [2024-02-20 12:23:54,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:23:54,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:23:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:23:54,156 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:23:54,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 12:23:54,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:23:54,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:23:54,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:23:54,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:23:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:23:54,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:23:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:23:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081552954] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:23:54,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:23:54,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2024-02-20 12:23:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021919617] [2024-02-20 12:23:54,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:23:54,583 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:23:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:23:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:23:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:23:54,611 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-02-20 12:23:54,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 3130 transitions, 67927 flow. Second operand has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:23:54,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:23:54,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-02-20 12:23:54,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:24:09,083 INFO L124 PetriNetUnfolderBase]: 17984/25768 cut-off events. [2024-02-20 12:24:09,084 INFO L125 PetriNetUnfolderBase]: For 220558/220558 co-relation queries the response was YES. [2024-02-20 12:24:09,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267301 conditions, 25768 events. 17984/25768 cut-off events. For 220558/220558 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 155966 event pairs, 144 based on Foata normal form. 378/26144 useless extension candidates. Maximal degree in co-relation 133818. Up to 19004 conditions per place. [2024-02-20 12:24:09,362 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 3831 selfloop transitions, 934 changer transitions 14/4780 dead transitions. [2024-02-20 12:24:09,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 4780 transitions, 110675 flow [2024-02-20 12:24:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-20 12:24:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-20 12:24:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 478 transitions. [2024-02-20 12:24:09,373 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42678571428571427 [2024-02-20 12:24:09,373 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 214 predicate places. [2024-02-20 12:24:09,373 INFO L507 AbstractCegarLoop]: Abstraction has has 251 places, 4780 transitions, 110675 flow [2024-02-20 12:24:09,373 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:24:09,374 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:24:09,374 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:24:09,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-20 12:24:09,586 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:24:09,588 INFO L432 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)] === [2024-02-20 12:24:09,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:24:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -629677507, now seen corresponding path program 9 times [2024-02-20 12:24:09,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:24:09,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296424657] [2024-02-20 12:24:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:24:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:24:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:24:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:24:09,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:24:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296424657] [2024-02-20 12:24:09,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296424657] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:24:09,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321888821] [2024-02-20 12:24:09,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:24:09,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:24:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:24:09,678 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:24:09,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 12:24:09,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 12:24:09,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:24:09,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:24:09,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:24:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:24:09,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:24:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:24:09,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321888821] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:24:09,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:24:09,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-02-20 12:24:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509984432] [2024-02-20 12:24:09,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:24:09,861 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 12:24:09,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:24:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 12:24:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-02-20 12:24:09,877 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-20 12:24:09,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 4780 transitions, 110675 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:24:09,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:24:09,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-20 12:24:09,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:24:29,703 INFO L124 PetriNetUnfolderBase]: 15038/21924 cut-off events. [2024-02-20 12:24:29,703 INFO L125 PetriNetUnfolderBase]: For 192988/192988 co-relation queries the response was YES. [2024-02-20 12:24:29,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248163 conditions, 21924 events. 15038/21924 cut-off events. For 192988/192988 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 133710 event pairs, 132 based on Foata normal form. 758/22680 useless extension candidates. Maximal degree in co-relation 112033. Up to 16566 conditions per place. [2024-02-20 12:24:30,017 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 3681 selfloop transitions, 244 changer transitions 19/4386 dead transitions. [2024-02-20 12:24:30,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 4386 transitions, 109568 flow [2024-02-20 12:24:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 12:24:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 12:24:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-02-20 12:24:30,019 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-02-20 12:24:30,020 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 220 predicate places. [2024-02-20 12:24:30,021 INFO L507 AbstractCegarLoop]: Abstraction has has 257 places, 4386 transitions, 109568 flow [2024-02-20 12:24:30,021 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:24:30,021 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:24:30,021 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:24:30,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 12:24:30,236 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-20 12:24:30,237 INFO L432 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)] === [2024-02-20 12:24:30,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:24:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1287130553, now seen corresponding path program 10 times [2024-02-20 12:24:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:24:30,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062629758] [2024-02-20 12:24:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:24:30,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:24:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:24:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:24:30,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:24:30,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062629758] [2024-02-20 12:24:30,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062629758] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:24:30,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673682160] [2024-02-20 12:24:30,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:24:30,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:24:30,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:24:30,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:24:30,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 12:24:30,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:24:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:24:30,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-20 12:24:30,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:24:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:24:30,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:24:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:24:30,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673682160] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:24:30,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:24:30,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-20 12:24:30,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127426260] [2024-02-20 12:24:30,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:24:30,907 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 12:24:30,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:24:30,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 12:24:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-02-20 12:24:30,953 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-20 12:24:30,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 4386 transitions, 109568 flow. Second operand has 16 states, 16 states have (on average 10.125) internal successors, (162), 16 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:24:30,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:24:30,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-20 12:24:30,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:24:52,165 INFO L124 PetriNetUnfolderBase]: 13796/20382 cut-off events. [2024-02-20 12:24:52,166 INFO L125 PetriNetUnfolderBase]: For 237029/237029 co-relation queries the response was YES. [2024-02-20 12:24:52,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250763 conditions, 20382 events. 13796/20382 cut-off events. For 237029/237029 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 125341 event pairs, 106 based on Foata normal form. 734/21114 useless extension candidates. Maximal degree in co-relation 140636. Up to 15454 conditions per place. [2024-02-20 12:24:52,460 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 3369 selfloop transitions, 670 changer transitions 403/4511 dead transitions. [2024-02-20 12:24:52,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 4511 transitions, 121942 flow [2024-02-20 12:24:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 12:24:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 12:24:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 274 transitions. [2024-02-20 12:24:52,462 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.46050420168067224 [2024-02-20 12:24:52,463 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 236 predicate places. [2024-02-20 12:24:52,464 INFO L507 AbstractCegarLoop]: Abstraction has has 273 places, 4511 transitions, 121942 flow [2024-02-20 12:24:52,464 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.125) internal successors, (162), 16 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:24:52,464 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:24:52,464 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:24:52,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-02-20 12:24:52,682 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-20 12:24:52,682 INFO L432 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)] === [2024-02-20 12:24:52,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:24:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1539002272, now seen corresponding path program 1 times [2024-02-20 12:24:52,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:24:52,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143453362] [2024-02-20 12:24:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:24:52,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:24:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:24:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:24:52,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:24:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143453362] [2024-02-20 12:24:52,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143453362] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:24:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077939518] [2024-02-20 12:24:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:24:52,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:24:52,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:24:52,749 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:24:52,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 12:24:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:24:52,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:24:52,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:24:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:24:52,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:24:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:24:52,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077939518] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:24:52,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:24:52,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-02-20 12:24:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45828151] [2024-02-20 12:24:52,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:24:52,932 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 12:24:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:24:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 12:24:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-02-20 12:24:52,972 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-20 12:24:52,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 4511 transitions, 121942 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:24:52,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:24:52,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-20 12:24:52,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:25:07,516 INFO L124 PetriNetUnfolderBase]: 10203/15128 cut-off events. [2024-02-20 12:25:07,516 INFO L125 PetriNetUnfolderBase]: For 170128/170128 co-relation queries the response was YES. [2024-02-20 12:25:07,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197476 conditions, 15128 events. 10203/15128 cut-off events. For 170128/170128 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 88481 event pairs, 94 based on Foata normal form. 398/15524 useless extension candidates. Maximal degree in co-relation 149790. Up to 11471 conditions per place. [2024-02-20 12:25:07,726 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 1789 selfloop transitions, 3 changer transitions 1339/3496 dead transitions. [2024-02-20 12:25:07,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 3496 transitions, 100344 flow [2024-02-20 12:25:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 12:25:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 12:25:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-02-20 12:25:07,727 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-02-20 12:25:07,728 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 232 predicate places. [2024-02-20 12:25:07,728 INFO L507 AbstractCegarLoop]: Abstraction has has 269 places, 3496 transitions, 100344 flow [2024-02-20 12:25:07,728 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:25:07,729 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:25:07,729 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:25:07,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-20 12:25:07,942 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-20 12:25:07,942 INFO L432 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)] === [2024-02-20 12:25:07,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:25:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash -654594348, now seen corresponding path program 11 times [2024-02-20 12:25:07,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:25:07,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508293684] [2024-02-20 12:25:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:25:07,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:25:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:25:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:25:08,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:25:08,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508293684] [2024-02-20 12:25:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508293684] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:25:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095101103] [2024-02-20 12:25:08,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:25:08,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:25:08,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:25:08,086 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:25:08,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-20 12:25:08,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:25:08,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:25:08,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:25:08,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:25:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:25:08,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:25:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:25:08,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095101103] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:25:08,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:25:08,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-02-20 12:25:08,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923345140] [2024-02-20 12:25:08,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:25:08,388 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:25:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:25:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:25:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:25:08,446 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-02-20 12:25:08,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 3496 transitions, 100344 flow. Second operand has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:25:08,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:25:08,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-02-20 12:25:08,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:25:27,410 INFO L124 PetriNetUnfolderBase]: 16485/23961 cut-off events. [2024-02-20 12:25:27,410 INFO L125 PetriNetUnfolderBase]: For 290798/290798 co-relation queries the response was YES. [2024-02-20 12:25:27,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340247 conditions, 23961 events. 16485/23961 cut-off events. For 290798/290798 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 145355 event pairs, 12 based on Foata normal form. 46/24005 useless extension candidates. Maximal degree in co-relation 276310. Up to 18794 conditions per place. [2024-02-20 12:25:27,790 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 3865 selfloop transitions, 1426 changer transitions 1756/7048 dead transitions. [2024-02-20 12:25:27,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 7048 transitions, 214641 flow [2024-02-20 12:25:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-02-20 12:25:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-02-20 12:25:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 747 transitions. [2024-02-20 12:25:27,793 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4104395604395604 [2024-02-20 12:25:27,793 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 283 predicate places. [2024-02-20 12:25:27,793 INFO L507 AbstractCegarLoop]: Abstraction has has 320 places, 7048 transitions, 214641 flow [2024-02-20 12:25:27,794 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:25:27,794 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:25:27,794 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:25:27,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-20 12:25:28,001 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-20 12:25:28,002 INFO L432 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)] === [2024-02-20 12:25:28,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:25:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1410926898, now seen corresponding path program 12 times [2024-02-20 12:25:28,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:25:28,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507649567] [2024-02-20 12:25:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:25:28,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:25:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:25:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:25:28,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:25:28,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507649567] [2024-02-20 12:25:28,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507649567] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:25:28,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340759883] [2024-02-20 12:25:28,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:25:28,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:25:28,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:25:28,099 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:25:28,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-20 12:25:28,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:25:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:25:28,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:25:28,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:25:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:25:28,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:25:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:25:28,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340759883] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:25:28,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:25:28,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-20 12:25:28,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246398644] [2024-02-20 12:25:28,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:25:28,367 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:25:28,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:25:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:25:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:25:28,398 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-20 12:25:28,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 7048 transitions, 214641 flow. Second operand has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:25:28,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:25:28,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-20 12:25:28,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:26:18,437 INFO L124 PetriNetUnfolderBase]: 23012/33222 cut-off events. [2024-02-20 12:26:18,437 INFO L125 PetriNetUnfolderBase]: For 439205/439205 co-relation queries the response was YES. [2024-02-20 12:26:18,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504650 conditions, 33222 events. 23012/33222 cut-off events. For 439205/439205 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 201904 event pairs, 54 based on Foata normal form. 46/33266 useless extension candidates. Maximal degree in co-relation 435082. Up to 26801 conditions per place. [2024-02-20 12:26:18,862 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 5937 selfloop transitions, 1338 changer transitions 1756/9390 dead transitions. [2024-02-20 12:26:18,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 9390 transitions, 305359 flow [2024-02-20 12:26:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 12:26:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 12:26:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 279 transitions. [2024-02-20 12:26:18,864 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4689075630252101 [2024-02-20 12:26:18,864 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 299 predicate places. [2024-02-20 12:26:18,864 INFO L507 AbstractCegarLoop]: Abstraction has has 336 places, 9390 transitions, 305359 flow [2024-02-20 12:26:18,864 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:26:18,865 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:26:18,865 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:26:18,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-20 12:26:19,068 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:26:19,069 INFO L432 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)] === [2024-02-20 12:26:19,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:26:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1531453764, now seen corresponding path program 13 times [2024-02-20 12:26:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:26:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973293547] [2024-02-20 12:26:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:26:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:26:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:26:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:26:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:26:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973293547] [2024-02-20 12:26:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973293547] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:26:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117956432] [2024-02-20 12:26:19,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:26:19,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:26:19,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:26:19,209 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:26:19,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-20 12:26:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:26:19,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:26:19,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:26:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:26:19,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:26:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:26:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117956432] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:26:19,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:26:19,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-20 12:26:19,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675540325] [2024-02-20 12:26:19,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:26:19,494 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:26:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:26:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:26:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:26:19,526 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-20 12:26:19,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 9390 transitions, 305359 flow. Second operand has 19 states, 19 states have (on average 8.789473684210526) internal successors, (167), 19 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) [2024-02-20 12:26:19,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:26:19,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-20 12:26:19,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:27:49,431 INFO L124 PetriNetUnfolderBase]: 28709/41237 cut-off events. [2024-02-20 12:27:49,431 INFO L125 PetriNetUnfolderBase]: For 586607/586607 co-relation queries the response was YES. [2024-02-20 12:27:49,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669472 conditions, 41237 events. 28709/41237 cut-off events. For 586607/586607 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 255531 event pairs, 68 based on Foata normal form. 48/41283 useless extension candidates. Maximal degree in co-relation 595414. Up to 34239 conditions per place. [2024-02-20 12:27:49,989 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 7324 selfloop transitions, 2073 changer transitions 1756/11512 dead transitions. [2024-02-20 12:27:49,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 11512 transitions, 398169 flow [2024-02-20 12:27:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 12:27:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 12:27:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 318 transitions. [2024-02-20 12:27:49,991 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4781954887218045 [2024-02-20 12:27:49,991 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 317 predicate places. [2024-02-20 12:27:49,991 INFO L507 AbstractCegarLoop]: Abstraction has has 354 places, 11512 transitions, 398169 flow [2024-02-20 12:27:49,991 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.789473684210526) internal successors, (167), 19 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) [2024-02-20 12:27:49,991 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:27:49,991 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:27:50,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-20 12:27:50,197 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-20 12:27:50,198 INFO L432 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)] === [2024-02-20 12:27:50,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:27:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1853599148, now seen corresponding path program 14 times [2024-02-20 12:27:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:27:50,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775897434] [2024-02-20 12:27:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:27:50,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:27:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:27:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:27:50,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:27:50,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775897434] [2024-02-20 12:27:50,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775897434] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:27:50,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532271257] [2024-02-20 12:27:50,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:27:50,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:27:50,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:27:50,340 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:27:50,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-20 12:27:50,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:27:50,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:27:50,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:27:50,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:27:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:27:50,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:27:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 12:27:50,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532271257] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:27:50,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:27:50,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-20 12:27:50,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190976407] [2024-02-20 12:27:50,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:27:50,660 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 12:27:50,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:27:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 12:27:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-02-20 12:27:50,696 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-20 12:27:50,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 11512 transitions, 398169 flow. Second operand has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:27:50,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:27:50,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-20 12:27:50,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:30:12,810 INFO L124 PetriNetUnfolderBase]: 30331/43528 cut-off events. [2024-02-20 12:30:12,810 INFO L125 PetriNetUnfolderBase]: For 671872/671872 co-relation queries the response was YES. [2024-02-20 12:30:12,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748193 conditions, 43528 events. 30331/43528 cut-off events. For 671872/671872 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 271125 event pairs, 76 based on Foata normal form. 48/43574 useless extension candidates. Maximal degree in co-relation 669807. Up to 36387 conditions per place. [2024-02-20 12:30:13,709 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 7620 selfloop transitions, 2463 changer transitions 1756/12191 dead transitions. [2024-02-20 12:30:13,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 12191 transitions, 446174 flow [2024-02-20 12:30:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-20 12:30:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-20 12:30:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 472 transitions. [2024-02-20 12:30:13,714 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4816326530612245 [2024-02-20 12:30:13,715 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 344 predicate places. [2024-02-20 12:30:13,716 INFO L507 AbstractCegarLoop]: Abstraction has has 381 places, 12191 transitions, 446174 flow [2024-02-20 12:30:13,716 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:30:13,716 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:30:13,716 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:30:13,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-20 12:30:13,930 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-20 12:30:13,931 INFO L432 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)] === [2024-02-20 12:30:13,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:30:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1433712290, now seen corresponding path program 15 times [2024-02-20 12:30:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:30:13,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12889539] [2024-02-20 12:30:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:30:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:30:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:30:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-20 12:30:14,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:30:14,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12889539] [2024-02-20 12:30:14,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12889539] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:30:14,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714708976] [2024-02-20 12:30:14,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:30:14,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:30:14,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:30:14,150 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:30:14,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-20 12:30:14,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:30:14,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:30:14,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 12:30:14,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:30:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-20 12:30:14,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:30:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-20 12:30:14,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714708976] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:30:14,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:30:14,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-20 12:30:14,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656505357] [2024-02-20 12:30:14,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:30:14,440 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 12:30:14,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:30:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 12:30:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-02-20 12:30:14,476 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-20 12:30:14,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 12191 transitions, 446174 flow. Second operand has 19 states, 19 states have (on average 8.421052631578947) internal successors, (160), 19 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:30:14,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:30:14,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-20 12:30:14,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:33:05,441 INFO L124 PetriNetUnfolderBase]: 31153/44738 cut-off events. [2024-02-20 12:33:05,442 INFO L125 PetriNetUnfolderBase]: For 751268/751268 co-relation queries the response was YES. [2024-02-20 12:33:05,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810414 conditions, 44738 events. 31153/44738 cut-off events. For 751268/751268 co-relation queries the response was YES. Maximal size of possible extension queue 1348. Compared 280270 event pairs, 72 based on Foata normal form. 48/44784 useless extension candidates. Maximal degree in co-relation 727500. Up to 37473 conditions per place. [2024-02-20 12:33:06,211 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 8539 selfloop transitions, 1956 changer transitions 1756/12603 dead transitions. [2024-02-20 12:33:06,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 12603 transitions, 485964 flow [2024-02-20 12:33:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-20 12:33:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-20 12:33:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 300 transitions. [2024-02-20 12:33:06,213 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-02-20 12:33:06,213 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 361 predicate places. [2024-02-20 12:33:06,213 INFO L507 AbstractCegarLoop]: Abstraction has has 398 places, 12603 transitions, 485964 flow [2024-02-20 12:33:06,213 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.421052631578947) internal successors, (160), 19 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:33:06,213 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:33:06,214 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:33:06,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-02-20 12:33:06,425 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:06,426 INFO L432 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)] === [2024-02-20 12:33:06,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:33:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1297914638, now seen corresponding path program 16 times [2024-02-20 12:33:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:33:06,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837450939] [2024-02-20 12:33:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:33:06,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:33:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:33:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-20 12:33:06,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:33:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837450939] [2024-02-20 12:33:06,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837450939] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:33:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980724302] [2024-02-20 12:33:06,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:33:06,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:33:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:33:06,515 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:33:06,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-20 12:33:06,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:33:06,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:33:06,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:33:06,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:33:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:33:06,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:33:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:33:07,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980724302] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:33:07,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:33:07,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-02-20 12:33:07,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335078661] [2024-02-20 12:33:07,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:33:07,010 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 12:33:07,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:33:07,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 12:33:07,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-02-20 12:33:07,033 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-02-20 12:33:07,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 12603 transitions, 485964 flow. Second operand has 18 states, 18 states have (on average 7.166666666666667) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:33:07,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:33:07,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-02-20 12:33:07,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15