./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:34:12,638 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:34:12,709 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:34:12,714 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:34:12,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:34:12,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:34:12,746 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:34:12,747 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:34:12,747 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:34:12,750 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:34:12,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:34:12,751 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:34:12,751 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:34:12,752 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:34:12,752 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:34:12,753 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:34:12,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:34:12,753 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:34:12,753 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:34:12,753 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:34:12,754 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:34:12,754 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:34:12,755 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:34:12,755 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:34:12,755 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:34:12,755 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:34:12,756 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:34:12,756 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:34:12,756 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:34:12,756 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:34:12,757 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:34:12,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:34:12,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:34:12,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:34:12,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:34:12,758 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:34:12,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:34:12,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:34:12,759 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:34:12,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:34:12,760 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:34:12,760 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:34:12,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:34:12,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:34:13,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:34:13,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:34:13,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:34:13,047 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:34:13,049 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:34:13,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2024-02-19 14:34:14,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:34:14,302 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:34:14,302 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2024-02-19 14:34:14,308 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa8d302ce/b7a7e2e4d2454983aa53e261b1a934d1/FLAG4f8d454f0 [2024-02-19 14:34:14,317 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa8d302ce/b7a7e2e4d2454983aa53e261b1a934d1 [2024-02-19 14:34:14,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:34:14,320 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:34:14,321 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:34:14,321 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:34:14,325 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:34:14,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f0c969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14, skipping insertion in model container [2024-02-19 14:34:14,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,348 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:34:14,515 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/chl-name-comparator-trans.wvr.c[4788,4801] [2024-02-19 14:34:14,528 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:34:14,537 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:34:14,570 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/chl-name-comparator-trans.wvr.c[4788,4801] [2024-02-19 14:34:14,583 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:34:14,602 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:34:14,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14 WrapperNode [2024-02-19 14:34:14,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:34:14,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:34:14,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:34:14,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:34:14,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,670 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 316 [2024-02-19 14:34:14,671 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:34:14,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:34:14,672 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:34:14,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:34:14,679 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,691 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,712 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 2, 4, 2, 2]. 33 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]. [2024-02-19 14:34:14,718 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,730 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,735 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,745 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:34:14,746 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:34:14,746 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:34:14,746 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:34:14,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (1/1) ... [2024-02-19 14:34:14,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:34:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:14,805 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) [2024-02-19 14:34:14,824 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 [2024-02-19 14:34:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:34:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:34:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:34:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:34:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:34:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 14:34:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-19 14:34:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:34:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:34:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:34:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 14:34:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-19 14:34:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 14:34:14,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 14:34:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 14:34:14,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 14:34:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-19 14:34:14,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-19 14:34:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:34:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:34:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:34:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 14:34:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-19 14:34:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 14:34:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:34:14,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:34:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:34:14,858 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:34:14,978 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:34:14,979 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:34:15,297 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:34:15,298 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:34:15,659 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:34:15,659 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-19 14:34:15,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:34:15 BoogieIcfgContainer [2024-02-19 14:34:15,660 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:34:15,662 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:34:15,662 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:34:15,664 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:34:15,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:34:14" (1/3) ... [2024-02-19 14:34:15,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff07996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:34:15, skipping insertion in model container [2024-02-19 14:34:15,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:34:14" (2/3) ... [2024-02-19 14:34:15,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff07996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:34:15, skipping insertion in model container [2024-02-19 14:34:15,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:34:15" (3/3) ... [2024-02-19 14:34:15,668 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-02-19 14:34:15,682 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:34:15,682 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:34:15,682 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:34:15,746 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-19 14:34:15,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 38 transitions, 97 flow [2024-02-19 14:34:15,814 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-02-19 14:34:15,814 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 14:34:15,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 7/35 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-02-19 14:34:15,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 38 transitions, 97 flow [2024-02-19 14:34:15,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 34 transitions, 86 flow [2024-02-19 14:34:15,832 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:34:15,838 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;@10deeba5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:34:15,839 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-19 14:34:15,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:34:15,854 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-02-19 14:34:15,854 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 14:34:15,854 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:15,855 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] [2024-02-19 14:34:15,855 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)] === [2024-02-19 14:34:15,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1134882823, now seen corresponding path program 1 times [2024-02-19 14:34:15,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:15,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833667437] [2024-02-19 14:34:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:15,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:16,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:16,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833667437] [2024-02-19 14:34:16,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833667437] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:34:16,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:34:16,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:34:16,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610593361] [2024-02-19 14:34:16,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:34:16,108 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-19 14:34:16,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-19 14:34:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-19 14:34:16,141 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:16,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:16,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:16,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:16,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:16,355 INFO L124 PetriNetUnfolderBase]: 466/696 cut-off events. [2024-02-19 14:34:16,356 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-02-19 14:34:16,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 696 events. 466/696 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2418 event pairs, 333 based on Foata normal form. 132/675 useless extension candidates. Maximal degree in co-relation 1177. Up to 679 conditions per place. [2024-02-19 14:34:16,364 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 27 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-02-19 14:34:16,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 134 flow [2024-02-19 14:34:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-19 14:34:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-19 14:34:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2024-02-19 14:34:16,373 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-02-19 14:34:16,376 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-02-19 14:34:16,376 INFO L507 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 134 flow [2024-02-19 14:34:16,377 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:16,378 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:16,378 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] [2024-02-19 14:34:16,378 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:34:16,378 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)] === [2024-02-19 14:34:16,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1038142041, now seen corresponding path program 1 times [2024-02-19 14:34:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:16,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257025582] [2024-02-19 14:34:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:16,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257025582] [2024-02-19 14:34:16,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257025582] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:34:16,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:34:16,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:34:16,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149691377] [2024-02-19 14:34:16,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:34:16,555 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:34:16,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:16,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:34:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:34:16,557 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:16,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:16,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:16,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:16,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:16,711 INFO L124 PetriNetUnfolderBase]: 466/696 cut-off events. [2024-02-19 14:34:16,712 INFO L125 PetriNetUnfolderBase]: For 80/132 co-relation queries the response was YES. [2024-02-19 14:34:16,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2123 conditions, 696 events. 466/696 cut-off events. For 80/132 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2441 event pairs, 333 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 1736. Up to 680 conditions per place. [2024-02-19 14:34:16,715 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-02-19 14:34:16,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 194 flow [2024-02-19 14:34:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:34:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:34:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-02-19 14:34:16,717 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2024-02-19 14:34:16,717 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-02-19 14:34:16,717 INFO L507 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 194 flow [2024-02-19 14:34:16,718 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:16,718 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:16,718 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] [2024-02-19 14:34:16,718 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 14:34:16,718 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)] === [2024-02-19 14:34:16,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1791199939, now seen corresponding path program 1 times [2024-02-19 14:34:16,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:16,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709394084] [2024-02-19 14:34:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:16,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:16,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709394084] [2024-02-19 14:34:16,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709394084] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:34:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102856552] [2024-02-19 14:34:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:16,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:16,841 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) [2024-02-19 14:34:16,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:34:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:16,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:34:16,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:34:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:17,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:34:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102856552] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:34:17,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:34:17,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-02-19 14:34:17,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117256482] [2024-02-19 14:34:17,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:34:17,046 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 14:34:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 14:34:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:34:17,047 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:17,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:17,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:17,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:17,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:17,155 INFO L124 PetriNetUnfolderBase]: 466/701 cut-off events. [2024-02-19 14:34:17,156 INFO L125 PetriNetUnfolderBase]: For 160/236 co-relation queries the response was YES. [2024-02-19 14:34:17,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2814 conditions, 701 events. 466/701 cut-off events. For 160/236 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2448 event pairs, 333 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 2299. Up to 682 conditions per place. [2024-02-19 14:34:17,162 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 26 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2024-02-19 14:34:17,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 34 transitions, 266 flow [2024-02-19 14:34:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:34:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:34:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-02-19 14:34:17,165 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3526315789473684 [2024-02-19 14:34:17,166 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2024-02-19 14:34:17,166 INFO L507 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 266 flow [2024-02-19 14:34:17,167 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:17,167 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:17,167 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-02-19 14:34:17,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-19 14:34:17,379 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:17,379 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)] === [2024-02-19 14:34:17,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1966668039, now seen corresponding path program 2 times [2024-02-19 14:34:17,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:17,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396271335] [2024-02-19 14:34:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:17,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:17,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:17,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396271335] [2024-02-19 14:34:17,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396271335] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:34:17,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:34:17,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:34:17,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431303785] [2024-02-19 14:34:17,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:34:17,643 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:34:17,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:34:17,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:34:17,645 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:17,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 266 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) [2024-02-19 14:34:17,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:17,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:17,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:17,918 INFO L124 PetriNetUnfolderBase]: 832/1258 cut-off events. [2024-02-19 14:34:17,918 INFO L125 PetriNetUnfolderBase]: For 463/607 co-relation queries the response was YES. [2024-02-19 14:34:17,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6236 conditions, 1258 events. 832/1258 cut-off events. For 463/607 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5278 event pairs, 289 based on Foata normal form. 1/996 useless extension candidates. Maximal degree in co-relation 5013. Up to 1215 conditions per place. [2024-02-19 14:34:17,925 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 42 selfloop transitions, 2 changer transitions 20/68 dead transitions. [2024-02-19 14:34:17,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 687 flow [2024-02-19 14:34:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:34:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:34:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-02-19 14:34:17,927 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2024-02-19 14:34:17,928 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2024-02-19 14:34:17,929 INFO L507 AbstractCegarLoop]: Abstraction has has 47 places, 68 transitions, 687 flow [2024-02-19 14:34:17,929 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) [2024-02-19 14:34:17,929 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:17,929 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-02-19 14:34:17,929 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 14:34:17,929 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)] === [2024-02-19 14:34:17,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:17,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1345744384, now seen corresponding path program 1 times [2024-02-19 14:34:17,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:17,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500267520] [2024-02-19 14:34:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:17,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-02-19 14:34:18,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:18,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500267520] [2024-02-19 14:34:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500267520] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:34:18,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:34:18,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:34:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470909697] [2024-02-19 14:34:18,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:34:18,158 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:34:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:34:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:34:18,158 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:18,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 68 transitions, 687 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) [2024-02-19 14:34:18,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:18,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:18,513 INFO L124 PetriNetUnfolderBase]: 1448/2211 cut-off events. [2024-02-19 14:34:18,513 INFO L125 PetriNetUnfolderBase]: For 1426/1690 co-relation queries the response was YES. [2024-02-19 14:34:18,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12940 conditions, 2211 events. 1448/2211 cut-off events. For 1426/1690 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10927 event pairs, 305 based on Foata normal form. 2/1746 useless extension candidates. Maximal degree in co-relation 10372. Up to 2107 conditions per place. [2024-02-19 14:34:18,526 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 63 selfloop transitions, 4 changer transitions 76/147 dead transitions. [2024-02-19 14:34:18,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 147 transitions, 1805 flow [2024-02-19 14:34:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:34:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:34:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-02-19 14:34:18,529 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-02-19 14:34:18,531 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2024-02-19 14:34:18,531 INFO L507 AbstractCegarLoop]: Abstraction has has 50 places, 147 transitions, 1805 flow [2024-02-19 14:34:18,531 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) [2024-02-19 14:34:18,533 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:18,534 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:34:18,534 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:34:18,534 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)] === [2024-02-19 14:34:18,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2039874415, now seen corresponding path program 1 times [2024-02-19 14:34:18,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:18,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008186661] [2024-02-19 14:34:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:19,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:19,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008186661] [2024-02-19 14:34:19,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008186661] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:34:19,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977393223] [2024-02-19 14:34:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:19,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:19,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:19,900 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) [2024-02-19 14:34:19,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:34:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:20,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-19 14:34:20,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:34:20,408 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 180 treesize of output 116 [2024-02-19 14:34:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:21,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:34:21,994 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 14:34:21,995 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 194 treesize of output 97 [2024-02-19 14:34:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:22,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977393223] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:34:22,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:34:22,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2024-02-19 14:34:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722992190] [2024-02-19 14:34:22,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:34:22,081 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-19 14:34:22,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-19 14:34:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-02-19 14:34:22,082 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:22,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 147 transitions, 1805 flow. Second operand has 27 states, 27 states have (on average 9.74074074074074) internal successors, (263), 27 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:22,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:22,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:22,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:28,013 INFO L124 PetriNetUnfolderBase]: 4690/7478 cut-off events. [2024-02-19 14:34:28,014 INFO L125 PetriNetUnfolderBase]: For 7683/8035 co-relation queries the response was YES. [2024-02-19 14:34:28,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50363 conditions, 7478 events. 4690/7478 cut-off events. For 7683/8035 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 48265 event pairs, 261 based on Foata normal form. 28/5923 useless extension candidates. Maximal degree in co-relation 37655. Up to 7033 conditions per place. [2024-02-19 14:34:28,071 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 242 selfloop transitions, 60 changer transitions 322/628 dead transitions. [2024-02-19 14:34:28,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 628 transitions, 9131 flow [2024-02-19 14:34:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-02-19 14:34:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-02-19 14:34:28,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 728 transitions. [2024-02-19 14:34:28,074 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4789473684210526 [2024-02-19 14:34:28,074 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2024-02-19 14:34:28,075 INFO L507 AbstractCegarLoop]: Abstraction has has 89 places, 628 transitions, 9131 flow [2024-02-19 14:34:28,075 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.74074074074074) internal successors, (263), 27 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:28,075 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:28,075 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:34:28,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:34:28,288 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,SelfDestructingSolverStorable5 [2024-02-19 14:34:28,289 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)] === [2024-02-19 14:34:28,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:28,289 INFO L85 PathProgramCache]: Analyzing trace with hash 298795429, now seen corresponding path program 2 times [2024-02-19 14:34:28,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:28,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032588802] [2024-02-19 14:34:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:28,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:34:29,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:29,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032588802] [2024-02-19 14:34:29,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032588802] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:34:29,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761564072] [2024-02-19 14:34:29,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:34:29,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:29,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:29,275 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) [2024-02-19 14:34:29,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:34:29,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:34:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:34:29,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:34:29,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:34:30,058 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 124 treesize of output 80 [2024-02-19 14:34:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:30,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:34:30,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:34:30,932 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 101 treesize of output 57 [2024-02-19 14:34:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761564072] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:34:30,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:34:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-02-19 14:34:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313303537] [2024-02-19 14:34:30,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:34:30,999 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-19 14:34:31,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-19 14:34:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-02-19 14:34:31,001 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:31,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 628 transitions, 9131 flow. Second operand has 29 states, 29 states have (on average 9.655172413793103) internal successors, (280), 29 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:31,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:31,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:31,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:38,151 INFO L124 PetriNetUnfolderBase]: 8476/13788 cut-off events. [2024-02-19 14:34:38,151 INFO L125 PetriNetUnfolderBase]: For 20983/21346 co-relation queries the response was YES. [2024-02-19 14:34:38,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105170 conditions, 13788 events. 8476/13788 cut-off events. For 20983/21346 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 101728 event pairs, 185 based on Foata normal form. 41/10903 useless extension candidates. Maximal degree in co-relation 84241. Up to 12876 conditions per place. [2024-02-19 14:34:38,251 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 620 selfloop transitions, 136 changer transitions 699/1459 dead transitions. [2024-02-19 14:34:38,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 1459 transitions, 24164 flow [2024-02-19 14:34:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-02-19 14:34:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-02-19 14:34:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 912 transitions. [2024-02-19 14:34:38,257 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-02-19 14:34:38,257 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 106 predicate places. [2024-02-19 14:34:38,258 INFO L507 AbstractCegarLoop]: Abstraction has has 143 places, 1459 transitions, 24164 flow [2024-02-19 14:34:38,258 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.655172413793103) internal successors, (280), 29 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:38,258 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:38,258 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:34:38,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 14:34:38,474 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:38,476 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)] === [2024-02-19 14:34:38,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 953082055, now seen corresponding path program 3 times [2024-02-19 14:34:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:38,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433759932] [2024-02-19 14:34:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:39,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433759932] [2024-02-19 14:34:39,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433759932] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:34:39,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752040804] [2024-02-19 14:34:39,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:34:39,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:39,152 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) [2024-02-19 14:34:39,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:34:39,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:34:39,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:34:39,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:34:39,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:34:39,782 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 72 [2024-02-19 14:34:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:39,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:34:40,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:34:40,457 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 196 treesize of output 108 [2024-02-19 14:34:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:40,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752040804] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:34:40,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:34:40,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2024-02-19 14:34:40,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281312078] [2024-02-19 14:34:40,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:34:40,714 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-19 14:34:40,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-19 14:34:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-02-19 14:34:40,715 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:40,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 1459 transitions, 24164 flow. Second operand has 28 states, 28 states have (on average 9.5) internal successors, (266), 28 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:40,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:40,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:40,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:34:52,083 INFO L124 PetriNetUnfolderBase]: 17802/29323 cut-off events. [2024-02-19 14:34:52,084 INFO L125 PetriNetUnfolderBase]: For 57949/58344 co-relation queries the response was YES. [2024-02-19 14:34:52,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250911 conditions, 29323 events. 17802/29323 cut-off events. For 57949/58344 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 248384 event pairs, 199 based on Foata normal form. 26/22919 useless extension candidates. Maximal degree in co-relation 210987. Up to 27392 conditions per place. [2024-02-19 14:34:52,294 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 1117 selfloop transitions, 280 changer transitions 1978/3379 dead transitions. [2024-02-19 14:34:52,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 3379 transitions, 62786 flow [2024-02-19 14:34:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-02-19 14:34:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-02-19 14:34:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 864 transitions. [2024-02-19 14:34:52,300 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4640171858216971 [2024-02-19 14:34:52,300 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 154 predicate places. [2024-02-19 14:34:52,300 INFO L507 AbstractCegarLoop]: Abstraction has has 191 places, 3379 transitions, 62786 flow [2024-02-19 14:34:52,301 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.5) internal successors, (266), 28 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:52,301 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:34:52,301 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:34:52,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 14:34:52,513 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:52,514 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)] === [2024-02-19 14:34:52,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:34:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1306417135, now seen corresponding path program 4 times [2024-02-19 14:34:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:34:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98890129] [2024-02-19 14:34:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:34:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:34:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:34:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:53,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:34:53,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98890129] [2024-02-19 14:34:53,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98890129] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:34:53,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612238555] [2024-02-19 14:34:53,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:34:53,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:34:53,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:34:53,222 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) [2024-02-19 14:34:53,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:34:53,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:34:53,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:34:53,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 14:34:53,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:34:53,630 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 201 treesize of output 129 [2024-02-19 14:34:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:53,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:34:54,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:34:54,564 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 144 treesize of output 80 [2024-02-19 14:34:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:34:54,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612238555] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:34:54,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:34:54,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-02-19 14:34:54,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818009816] [2024-02-19 14:34:54,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:34:54,679 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:34:54,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:34:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:34:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:34:54,681 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:34:54,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 3379 transitions, 62786 flow. Second operand has 22 states, 22 states have (on average 10.136363636363637) internal successors, (223), 22 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:34:54,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:34:54,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:34:54,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:13,896 INFO L124 PetriNetUnfolderBase]: 21048/34734 cut-off events. [2024-02-19 14:35:13,896 INFO L125 PetriNetUnfolderBase]: For 86489/86751 co-relation queries the response was YES. [2024-02-19 14:35:13,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329698 conditions, 34734 events. 21048/34734 cut-off events. For 86489/86751 co-relation queries the response was YES. Maximal size of possible extension queue 1931. Compared 302003 event pairs, 193 based on Foata normal form. 55/27184 useless extension candidates. Maximal degree in co-relation 280675. Up to 32447 conditions per place. [2024-02-19 14:35:14,135 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 1509 selfloop transitions, 255 changer transitions 2401/4169 dead transitions. [2024-02-19 14:35:14,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 4169 transitions, 85798 flow [2024-02-19 14:35:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-19 14:35:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-19 14:35:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 707 transitions. [2024-02-19 14:35:14,138 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5028449502133713 [2024-02-19 14:35:14,139 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 189 predicate places. [2024-02-19 14:35:14,139 INFO L507 AbstractCegarLoop]: Abstraction has has 226 places, 4169 transitions, 85798 flow [2024-02-19 14:35:14,139 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.136363636363637) internal successors, (223), 22 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:14,139 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:14,140 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:35:14,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:14,341 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:14,341 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)] === [2024-02-19 14:35:14,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1663438341, now seen corresponding path program 5 times [2024-02-19 14:35:14,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:14,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656092535] [2024-02-19 14:35:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:14,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:35:14,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656092535] [2024-02-19 14:35:14,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656092535] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961590490] [2024-02-19 14:35:14,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:35:14,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:14,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:14,813 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) [2024-02-19 14:35:14,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 14:35:14,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 14:35:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:35:14,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:35:14,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:15,161 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 109 treesize of output 69 [2024-02-19 14:35:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:35:15,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:16,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:35:16,215 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 166 treesize of output 94 [2024-02-19 14:35:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:35:16,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961590490] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:16,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:16,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2024-02-19 14:35:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461424349] [2024-02-19 14:35:16,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:16,336 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:35:16,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:35:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:35:16,337 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:35:16,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 4169 transitions, 85798 flow. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:16,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:16,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:35:16,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:44,109 INFO L124 PetriNetUnfolderBase]: 25306/42067 cut-off events. [2024-02-19 14:35:44,109 INFO L125 PetriNetUnfolderBase]: For 119651/120163 co-relation queries the response was YES. [2024-02-19 14:35:44,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440882 conditions, 42067 events. 25306/42067 cut-off events. For 119651/120163 co-relation queries the response was YES. Maximal size of possible extension queue 2401. Compared 379200 event pairs, 169 based on Foata normal form. 37/32906 useless extension candidates. Maximal degree in co-relation 373460. Up to 39511 conditions per place. [2024-02-19 14:35:44,450 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 2213 selfloop transitions, 337 changer transitions 3420/5974 dead transitions. [2024-02-19 14:35:44,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 5974 transitions, 134912 flow [2024-02-19 14:35:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-19 14:35:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-19 14:35:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 671 transitions. [2024-02-19 14:35:44,452 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5045112781954887 [2024-02-19 14:35:44,453 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 223 predicate places. [2024-02-19 14:35:44,453 INFO L507 AbstractCegarLoop]: Abstraction has has 260 places, 5974 transitions, 134912 flow [2024-02-19 14:35:44,453 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:44,453 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:44,454 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:35:44,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:44,654 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:44,654 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)] === [2024-02-19 14:35:44,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -706490937, now seen corresponding path program 6 times [2024-02-19 14:35:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651751986] [2024-02-19 14:35:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:45,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:45,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651751986] [2024-02-19 14:35:45,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651751986] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:45,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840605753] [2024-02-19 14:35:45,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:35:45,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:45,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:45,788 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) [2024-02-19 14:35:45,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 14:35:45,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:35:45,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:35:45,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:35:45,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:46,203 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 72 [2024-02-19 14:35:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:35:46,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:47,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:35:47,328 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 225 treesize of output 121 [2024-02-19 14:35:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:35:47,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840605753] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:47,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:47,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2024-02-19 14:35:47,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791789912] [2024-02-19 14:35:47,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:47,521 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 14:35:47,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 14:35:47,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2024-02-19 14:35:47,523 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:35:47,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 5974 transitions, 134912 flow. Second operand has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 31 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:47,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:47,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:35:47,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:33,299 INFO L124 PetriNetUnfolderBase]: 27498/46097 cut-off events. [2024-02-19 14:36:33,299 INFO L125 PetriNetUnfolderBase]: For 158126/158586 co-relation queries the response was YES. [2024-02-19 14:36:33,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526495 conditions, 46097 events. 27498/46097 cut-off events. For 158126/158586 co-relation queries the response was YES. Maximal size of possible extension queue 2670. Compared 425726 event pairs, 171 based on Foata normal form. 21/36056 useless extension candidates. Maximal degree in co-relation 440733. Up to 43301 conditions per place. [2024-02-19 14:36:33,624 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 2369 selfloop transitions, 430 changer transitions 4065/6868 dead transitions. [2024-02-19 14:36:33,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 6868 transitions, 168911 flow [2024-02-19 14:36:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-02-19 14:36:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-02-19 14:36:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 1245 transitions. [2024-02-19 14:36:33,626 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4748283752860412 [2024-02-19 14:36:33,627 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 291 predicate places. [2024-02-19 14:36:33,627 INFO L507 AbstractCegarLoop]: Abstraction has has 328 places, 6868 transitions, 168911 flow [2024-02-19 14:36:33,627 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 31 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:33,627 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:33,627 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:36:33,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-19 14:36:33,827 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:33,828 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)] === [2024-02-19 14:36:33,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:33,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1171037843, now seen corresponding path program 7 times [2024-02-19 14:36:33,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:33,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587890042] [2024-02-19 14:36:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:36:34,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587890042] [2024-02-19 14:36:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587890042] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002309621] [2024-02-19 14:36:34,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:36:34,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:34,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:34,233 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) [2024-02-19 14:36:34,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-19 14:36:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:34,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2024-02-19 14:36:34,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:34,634 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 198 treesize of output 126 [2024-02-19 14:36:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:36:35,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:36,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:36:36,052 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 195 treesize of output 107 [2024-02-19 14:36:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:36:36,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002309621] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:36,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:36,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2024-02-19 14:36:36,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571340222] [2024-02-19 14:36:36,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:36,170 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:36:36,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:36,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:36:36,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:36:36,171 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:36:36,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 6868 transitions, 168911 flow. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:36,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:36,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:36:36,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:37:33,002 INFO L124 PetriNetUnfolderBase]: 30844/51961 cut-off events. [2024-02-19 14:37:33,002 INFO L125 PetriNetUnfolderBase]: For 213612/214184 co-relation queries the response was YES. [2024-02-19 14:37:33,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641962 conditions, 51961 events. 30844/51961 cut-off events. For 213612/214184 co-relation queries the response was YES. Maximal size of possible extension queue 2988. Compared 489444 event pairs, 181 based on Foata normal form. 40/40707 useless extension candidates. Maximal degree in co-relation 529778. Up to 48776 conditions per place. [2024-02-19 14:37:33,440 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 3002 selfloop transitions, 559 changer transitions 4491/8056 dead transitions. [2024-02-19 14:37:33,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 8056 transitions, 214355 flow [2024-02-19 14:37:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-02-19 14:37:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-02-19 14:37:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 930 transitions. [2024-02-19 14:37:33,442 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48947368421052634 [2024-02-19 14:37:33,443 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 340 predicate places. [2024-02-19 14:37:33,443 INFO L507 AbstractCegarLoop]: Abstraction has has 377 places, 8056 transitions, 214355 flow [2024-02-19 14:37:33,443 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:33,443 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:37:33,443 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:37:33,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-19 14:37:33,652 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,SelfDestructingSolverStorable11 [2024-02-19 14:37:33,652 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)] === [2024-02-19 14:37:33,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:37:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash -192104143, now seen corresponding path program 8 times [2024-02-19 14:37:33,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:37:33,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751327818] [2024-02-19 14:37:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:37:33,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:37:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:37:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:37:34,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:37:34,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751327818] [2024-02-19 14:37:34,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751327818] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:37:34,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012113104] [2024-02-19 14:37:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:37:34,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:37:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:37:34,533 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) [2024-02-19 14:37:34,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-19 14:37:34,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:37:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:37:34,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:37:34,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:37:35,073 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 133 treesize of output 85 [2024-02-19 14:37:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:37:35,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:37:36,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:37:36,118 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 196 treesize of output 108 [2024-02-19 14:37:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:37:36,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012113104] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:37:36,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:37:36,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2024-02-19 14:37:36,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887956086] [2024-02-19 14:37:36,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:37:36,265 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 14:37:36,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:37:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 14:37:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-02-19 14:37:36,266 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:37:36,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 8056 transitions, 214355 flow. Second operand has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 31 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:36,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:37:36,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:37:36,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:38:55,152 INFO L124 PetriNetUnfolderBase]: 34711/58460 cut-off events. [2024-02-19 14:38:55,152 INFO L125 PetriNetUnfolderBase]: For 283779/284095 co-relation queries the response was YES. [2024-02-19 14:38:55,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776817 conditions, 58460 events. 34711/58460 cut-off events. For 283779/284095 co-relation queries the response was YES. Maximal size of possible extension queue 3343. Compared 558437 event pairs, 147 based on Foata normal form. 32/45781 useless extension candidates. Maximal degree in co-relation 660573. Up to 54852 conditions per place. [2024-02-19 14:38:55,700 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 3989 selfloop transitions, 515 changer transitions 5230/9738 dead transitions. [2024-02-19 14:38:55,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 9738 transitions, 278476 flow [2024-02-19 14:38:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-02-19 14:38:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-02-19 14:38:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1058 transitions. [2024-02-19 14:38:55,703 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42834008097165993 [2024-02-19 14:38:55,703 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 404 predicate places. [2024-02-19 14:38:55,703 INFO L507 AbstractCegarLoop]: Abstraction has has 441 places, 9738 transitions, 278476 flow [2024-02-19 14:38:55,703 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 31 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:55,703 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:38:55,704 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:38:55,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-19 14:38:55,912 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-19 14:38:55,912 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)] === [2024-02-19 14:38:55,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:38:55,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2133370129, now seen corresponding path program 9 times [2024-02-19 14:38:55,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:38:55,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227626979] [2024-02-19 14:38:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:38:55,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:38:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:38:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:38:56,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:38:56,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227626979] [2024-02-19 14:38:56,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227626979] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:38:56,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957138239] [2024-02-19 14:38:56,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:38:56,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:38:56,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:38:56,408 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) [2024-02-19 14:38:56,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-19 14:38:56,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:38:56,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:38:56,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:38:56,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:38:56,738 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 134 treesize of output 86 [2024-02-19 14:38:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:38:57,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:38:57,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:38:57,866 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 102 treesize of output 62 [2024-02-19 14:38:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:38:58,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957138239] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:38:58,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:38:58,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 25 [2024-02-19 14:38:58,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661001358] [2024-02-19 14:38:58,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:38:58,011 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-19 14:38:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:38:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-19 14:38:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-02-19 14:38:58,017 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:38:58,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 9738 transitions, 278476 flow. Second operand has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:58,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:38:58,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:38:58,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:40:40,823 INFO L124 PetriNetUnfolderBase]: 37166/63050 cut-off events. [2024-02-19 14:40:40,824 INFO L125 PetriNetUnfolderBase]: For 354860/355487 co-relation queries the response was YES. [2024-02-19 14:40:40,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897407 conditions, 63050 events. 37166/63050 cut-off events. For 354860/355487 co-relation queries the response was YES. Maximal size of possible extension queue 3662. Compared 613862 event pairs, 155 based on Foata normal form. 35/49425 useless extension candidates. Maximal degree in co-relation 744423. Up to 59181 conditions per place. [2024-02-19 14:40:41,607 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 4129 selfloop transitions, 504 changer transitions 6109/10746 dead transitions. [2024-02-19 14:40:41,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 10746 transitions, 329033 flow [2024-02-19 14:40:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-02-19 14:40:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-02-19 14:40:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 887 transitions. [2024-02-19 14:40:41,609 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4966405375139978 [2024-02-19 14:40:41,610 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 449 predicate places. [2024-02-19 14:40:41,610 INFO L507 AbstractCegarLoop]: Abstraction has has 486 places, 10746 transitions, 329033 flow [2024-02-19 14:40:41,610 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:40:41,610 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:40:41,610 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:40:41,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-02-19 14:40:41,825 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,SelfDestructingSolverStorable13 [2024-02-19 14:40:41,826 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)] === [2024-02-19 14:40:41,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:40:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 150208647, now seen corresponding path program 10 times [2024-02-19 14:40:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:40:41,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579792946] [2024-02-19 14:40:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:40:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:40:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:40:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:40:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:40:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579792946] [2024-02-19 14:40:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579792946] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:40:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101876415] [2024-02-19 14:40:42,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:40:42,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:40:42,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:40:42,200 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) [2024-02-19 14:40:42,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-19 14:40:42,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:40:42,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:40:42,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:40:42,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:40:42,802 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 115 treesize of output 75 [2024-02-19 14:40:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:40:42,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:40:43,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:40:43,628 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 225 treesize of output 121 [2024-02-19 14:40:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:40:43,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101876415] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:40:43,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:40:43,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-02-19 14:40:43,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543596329] [2024-02-19 14:40:43,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:40:43,780 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 14:40:43,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:40:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 14:40:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-02-19 14:40:43,781 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:40:43,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 10746 transitions, 329033 flow. Second operand has 22 states, 22 states have (on average 10.136363636363637) internal successors, (223), 22 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:40:43,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:40:43,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:40:43,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:43:00,758 INFO L124 PetriNetUnfolderBase]: 37411/63493 cut-off events. [2024-02-19 14:43:00,758 INFO L125 PetriNetUnfolderBase]: For 413025/413393 co-relation queries the response was YES. [2024-02-19 14:43:00,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962986 conditions, 63493 events. 37411/63493 cut-off events. For 413025/413393 co-relation queries the response was YES. Maximal size of possible extension queue 3686. Compared 618888 event pairs, 165 based on Foata normal form. 48/49796 useless extension candidates. Maximal degree in co-relation 811678. Up to 59576 conditions per place. [2024-02-19 14:43:01,385 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 3908 selfloop transitions, 705 changer transitions 6204/10821 dead transitions. [2024-02-19 14:43:01,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 10821 transitions, 352947 flow [2024-02-19 14:43:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-19 14:43:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-19 14:43:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 666 transitions. [2024-02-19 14:43:01,387 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5007518796992482 [2024-02-19 14:43:01,387 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 482 predicate places. [2024-02-19 14:43:01,387 INFO L507 AbstractCegarLoop]: Abstraction has has 519 places, 10821 transitions, 352947 flow [2024-02-19 14:43:01,387 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.136363636363637) internal successors, (223), 22 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:43:01,387 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:43:01,388 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:43:01,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-02-19 14:43:01,598 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,SelfDestructingSolverStorable14 [2024-02-19 14:43:01,599 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)] === [2024-02-19 14:43:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:43:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 201758047, now seen corresponding path program 11 times [2024-02-19 14:43:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:43:01,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856517866] [2024-02-19 14:43:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:43:01,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:43:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:43:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:43:01,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:43:01,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856517866] [2024-02-19 14:43:01,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856517866] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:43:01,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686069441] [2024-02-19 14:43:01,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:43:01,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:43:01,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:43:01,972 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) [2024-02-19 14:43:01,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-19 14:43:02,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 14:43:02,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:43:02,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 14:43:02,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:43:02,520 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 133 treesize of output 85 [2024-02-19 14:43:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:43:02,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:43:03,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:43:03,379 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 196 treesize of output 108 [2024-02-19 14:43:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:43:03,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686069441] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:43:03,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:43:03,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2024-02-19 14:43:03,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939676681] [2024-02-19 14:43:03,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:43:03,550 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:43:03,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:43:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:43:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:43:03,552 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:43:03,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 10821 transitions, 352947 flow. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:43:03,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:43:03,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:43:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:03,321 INFO L124 PetriNetUnfolderBase]: 37717/63993 cut-off events. [2024-02-19 14:45:03,321 INFO L125 PetriNetUnfolderBase]: For 471015/471665 co-relation queries the response was YES. [2024-02-19 14:45:03,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031272 conditions, 63993 events. 37717/63993 cut-off events. For 471015/471665 co-relation queries the response was YES. Maximal size of possible extension queue 3730. Compared 624452 event pairs, 163 based on Foata normal form. 38/50161 useless extension candidates. Maximal degree in co-relation 859282. Up to 60085 conditions per place. [2024-02-19 14:45:04,018 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 4080 selfloop transitions, 448 changer transitions 6446/10978 dead transitions. [2024-02-19 14:45:04,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 10978 transitions, 380057 flow [2024-02-19 14:45:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-19 14:45:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-19 14:45:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 657 transitions. [2024-02-19 14:45:04,019 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5085139318885449 [2024-02-19 14:45:04,020 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 515 predicate places. [2024-02-19 14:45:04,020 INFO L507 AbstractCegarLoop]: Abstraction has has 552 places, 10978 transitions, 380057 flow [2024-02-19 14:45:04,023 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:04,023 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:04,023 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:45:04,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-19 14:45:04,234 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,SelfDestructingSolverStorable15 [2024-02-19 14:45:04,235 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)] === [2024-02-19 14:45:04,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash -675985231, now seen corresponding path program 12 times [2024-02-19 14:45:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:04,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710378553] [2024-02-19 14:45:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:45:04,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:04,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710378553] [2024-02-19 14:45:04,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710378553] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:04,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896766342] [2024-02-19 14:45:04,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:45:04,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:45:04,609 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) [2024-02-19 14:45:04,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-19 14:45:04,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:45:04,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:45:04,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 14:45:04,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:45:05,331 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 154 treesize of output 98 [2024-02-19 14:45:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:45:05,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:45:06,012 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 14:45:06,013 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 79 treesize of output 42 [2024-02-19 14:45:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:45:06,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896766342] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:45:06,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:45:06,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2024-02-19 14:45:06,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495672687] [2024-02-19 14:45:06,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:45:06,049 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-19 14:45:06,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-19 14:45:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-02-19 14:45:06,050 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:45:06,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 10978 transitions, 380057 flow. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:06,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:06,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:45:06,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:47:18,675 INFO L124 PetriNetUnfolderBase]: 38051/64682 cut-off events. [2024-02-19 14:47:18,676 INFO L125 PetriNetUnfolderBase]: For 542799/543183 co-relation queries the response was YES. [2024-02-19 14:47:18,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1102484 conditions, 64682 events. 38051/64682 cut-off events. For 542799/543183 co-relation queries the response was YES. Maximal size of possible extension queue 3777. Compared 633540 event pairs, 159 based on Foata normal form. 57/50744 useless extension candidates. Maximal degree in co-relation 929608. Up to 60695 conditions per place. [2024-02-19 14:47:19,356 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 3958 selfloop transitions, 635 changer transitions 6576/11173 dead transitions. [2024-02-19 14:47:19,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 11173 transitions, 409136 flow [2024-02-19 14:47:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-02-19 14:47:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-02-19 14:47:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 863 transitions. [2024-02-19 14:47:19,361 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4453044375644995 [2024-02-19 14:47:19,362 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 565 predicate places. [2024-02-19 14:47:19,362 INFO L507 AbstractCegarLoop]: Abstraction has has 602 places, 11173 transitions, 409136 flow [2024-02-19 14:47:19,362 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:47:19,362 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:47:19,362 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:47:19,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-19 14:47:19,574 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,SelfDestructingSolverStorable16 [2024-02-19 14:47:19,575 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)] === [2024-02-19 14:47:19,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:47:19,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1262243617, now seen corresponding path program 13 times [2024-02-19 14:47:19,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:47:19,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073307523] [2024-02-19 14:47:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:47:19,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:47:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:47:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:47:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:47:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073307523] [2024-02-19 14:47:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073307523] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:47:20,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962619695] [2024-02-19 14:47:20,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:47:20,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:47:20,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:47:20,201 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) [2024-02-19 14:47:20,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-19 14:47:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:47:20,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-19 14:47:20,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:47:20,628 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 115 treesize of output 75 [2024-02-19 14:47:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:47:20,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:47:21,179 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 14:47:21,180 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 135 treesize of output 70 [2024-02-19 14:47:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:47:21,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962619695] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:47:21,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:47:21,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-02-19 14:47:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691256056] [2024-02-19 14:47:21,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:47:21,235 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 14:47:21,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:47:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 14:47:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-02-19 14:47:21,236 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-02-19 14:47:21,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 11173 transitions, 409136 flow. Second operand has 24 states, 24 states have (on average 9.875) internal successors, (237), 24 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:47:21,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:47:21,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-02-19 14:47:21,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15