./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB --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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:21:11,590 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:21:11,695 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:21:11,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:21:11,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:21:11,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:21:11,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:21:11,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:21:11,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:21:11,746 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:21:11,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:21:11,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:21:11,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:21:11,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:21:11,746 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:21:11,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:21:11,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:21:11,747 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:21:11,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:21:11,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:21:11,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:21:11,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:21:11,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:21:11,747 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:21:11,748 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:21:11,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:21:11,748 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:21:11,748 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:21:11,748 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:21:11,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:21:11,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:21:11,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:21:11,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:11,751 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:21:11,751 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:21:11,751 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:21:11,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:21:11,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:11,752 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:21:11,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:21:11,752 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:21:11,752 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:21:11,752 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:21:11,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:21:11,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:21:11,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:21:11,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:21:11,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:21:11,753 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-11-28 05:21:12,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:21:12,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:21:12,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:21:12,091 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:21:12,091 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:21:12,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-28 05:21:15,006 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/data/b6b91764b/4071bb7bdce747fd886089ea4b3393c9/FLAGbe4586488 [2024-11-28 05:21:15,376 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:21:15,380 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-28 05:21:15,396 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/data/b6b91764b/4071bb7bdce747fd886089ea4b3393c9/FLAGbe4586488 [2024-11-28 05:21:15,421 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/data/b6b91764b/4071bb7bdce747fd886089ea4b3393c9 [2024-11-28 05:21:15,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:21:15,425 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:21:15,427 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:21:15,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:21:15,433 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:21:15,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ba7aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15, skipping insertion in model container [2024-11-28 05:21:15,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,456 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:21:15,684 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[3013,3026] [2024-11-28 05:21:15,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:21:15,716 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:21:15,747 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[3013,3026] [2024-11-28 05:21:15,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:21:15,766 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:21:15,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15 WrapperNode [2024-11-28 05:21:15,767 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:21:15,768 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:21:15,768 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:21:15,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:21:15,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,809 INFO L138 Inliner]: procedures = 23, calls = 33, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 194 [2024-11-28 05:21:15,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:21:15,810 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:21:15,810 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:21:15,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:21:15,819 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,822 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,836 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 05:21:15,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,852 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,863 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,864 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:21:15,867 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:21:15,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:21:15,867 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:21:15,868 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (1/1) ... [2024-11-28 05:21:15,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:15,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:21:15,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:21:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:21:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:21:15,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:21:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:21:15,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:21:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:21:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:21:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:21:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:21:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 05:21:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 05:21:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:21:15,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:21:15,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:21:15,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:21:15,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:21:15,946 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 05:21:16,077 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:21:16,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:21:16,469 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:21:16,469 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:21:16,805 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:21:16,809 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:21:16,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:21:16 BoogieIcfgContainer [2024-11-28 05:21:16,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:21:16,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:21:16,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:21:16,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:21:16,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:21:15" (1/3) ... [2024-11-28 05:21:16,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4639e285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:21:16, skipping insertion in model container [2024-11-28 05:21:16,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:15" (2/3) ... [2024-11-28 05:21:16,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4639e285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:21:16, skipping insertion in model container [2024-11-28 05:21:16,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:21:16" (3/3) ... [2024-11-28 05:21:16,819 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-11-28 05:21:16,837 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:21:16,839 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-two-queue.wvr.c that has 3 procedures, 25 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-28 05:21:16,839 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:21:16,893 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 05:21:16,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2024-11-28 05:21:16,977 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-28 05:21:16,979 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:21:16,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-28 05:21:16,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2024-11-28 05:21:16,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2024-11-28 05:21:17,003 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:21:17,018 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@77331c70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:21:17,021 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 05:21:17,037 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:21:17,037 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-28 05:21:17,038 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:21:17,038 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:17,039 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:17,040 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:21:17,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash 907104836, now seen corresponding path program 1 times [2024-11-28 05:21:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:17,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363323614] [2024-11-28 05:21:17,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:17,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:21:17,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:17,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363323614] [2024-11-28 05:21:17,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363323614] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:17,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:17,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:21:17,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081626608] [2024-11-28 05:21:17,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:17,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:21:17,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:17,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:21:17,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:21:17,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-28 05:21:17,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:17,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:17,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-28 05:21:17,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:17,846 INFO L124 PetriNetUnfolderBase]: 141/263 cut-off events. [2024-11-28 05:21:17,846 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-28 05:21:17,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 263 events. 141/263 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1054 event pairs, 26 based on Foata normal form. 1/258 useless extension candidates. Maximal degree in co-relation 458. Up to 181 conditions per place. [2024-11-28 05:21:17,852 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 27 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2024-11-28 05:21:17,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 155 flow [2024-11-28 05:21:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:21:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:21:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-11-28 05:21:17,870 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-28 05:21:17,874 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 3 states and 53 transitions. [2024-11-28 05:21:17,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 155 flow [2024-11-28 05:21:17,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 141 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:21:17,886 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 73 flow [2024-11-28 05:21:17,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-11-28 05:21:17,895 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-11-28 05:21:17,895 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 73 flow [2024-11-28 05:21:17,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:17,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:17,896 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:17,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:21:17,896 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:21:17,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1730557511, now seen corresponding path program 1 times [2024-11-28 05:21:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301151238] [2024-11-28 05:21:17,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:21:18,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301151238] [2024-11-28 05:21:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301151238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:18,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:18,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:21:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634466623] [2024-11-28 05:21:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:18,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:21:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:18,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:21:18,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:21:18,094 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-28 05:21:18,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:18,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:18,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-28 05:21:18,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:18,248 INFO L124 PetriNetUnfolderBase]: 105/206 cut-off events. [2024-11-28 05:21:18,248 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-28 05:21:18,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 206 events. 105/206 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 732 event pairs, 22 based on Foata normal form. 6/206 useless extension candidates. Maximal degree in co-relation 120. Up to 143 conditions per place. [2024-11-28 05:21:18,250 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 25 selfloop transitions, 2 changer transitions 2/34 dead transitions. [2024-11-28 05:21:18,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 147 flow [2024-11-28 05:21:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:21:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:21:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-28 05:21:18,252 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-28 05:21:18,252 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 73 flow. Second operand 3 states and 49 transitions. [2024-11-28 05:21:18,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 147 flow [2024-11-28 05:21:18,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:21:18,254 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 82 flow [2024-11-28 05:21:18,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2024-11-28 05:21:18,255 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-11-28 05:21:18,255 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 82 flow [2024-11-28 05:21:18,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:18,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:18,255 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:18,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:21:18,255 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:21:18,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1352827747, now seen corresponding path program 1 times [2024-11-28 05:21:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:18,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135793575] [2024-11-28 05:21:18,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:21:18,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:18,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135793575] [2024-11-28 05:21:18,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135793575] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:18,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:18,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:21:18,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107741579] [2024-11-28 05:21:18,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:18,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:21:18,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:18,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:21:18,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:21:18,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-28 05:21:18,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:18,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:18,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-28 05:21:18,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:18,551 INFO L124 PetriNetUnfolderBase]: 80/164 cut-off events. [2024-11-28 05:21:18,551 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-28 05:21:18,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 164 events. 80/164 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 486 event pairs, 28 based on Foata normal form. 5/164 useless extension candidates. Maximal degree in co-relation 244. Up to 112 conditions per place. [2024-11-28 05:21:18,554 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 26 selfloop transitions, 2 changer transitions 4/37 dead transitions. [2024-11-28 05:21:18,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 37 transitions, 170 flow [2024-11-28 05:21:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:21:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:21:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-28 05:21:18,557 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-28 05:21:18,558 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 82 flow. Second operand 3 states and 51 transitions. [2024-11-28 05:21:18,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 37 transitions, 170 flow [2024-11-28 05:21:18,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:21:18,560 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 92 flow [2024-11-28 05:21:18,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-11-28 05:21:18,561 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2024-11-28 05:21:18,562 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 92 flow [2024-11-28 05:21:18,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:18,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:18,562 INFO L206 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] [2024-11-28 05:21:18,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:21:18,562 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:21:18,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash 742878956, now seen corresponding path program 1 times [2024-11-28 05:21:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504233729] [2024-11-28 05:21:18,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:18,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:18,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504233729] [2024-11-28 05:21:18,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504233729] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:18,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:18,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:21:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055587543] [2024-11-28 05:21:18,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:18,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:21:18,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:18,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:21:18,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:21:18,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-28 05:21:18,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:18,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:18,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-28 05:21:18,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:18,930 INFO L124 PetriNetUnfolderBase]: 95/216 cut-off events. [2024-11-28 05:21:18,930 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-28 05:21:18,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 216 events. 95/216 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 822 event pairs, 67 based on Foata normal form. 4/211 useless extension candidates. Maximal degree in co-relation 266. Up to 150 conditions per place. [2024-11-28 05:21:18,932 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 23 selfloop transitions, 2 changer transitions 12/42 dead transitions. [2024-11-28 05:21:18,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 42 transitions, 199 flow [2024-11-28 05:21:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:21:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:21:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-28 05:21:18,933 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-11-28 05:21:18,933 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 92 flow. Second operand 4 states and 62 transitions. [2024-11-28 05:21:18,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 42 transitions, 199 flow [2024-11-28 05:21:18,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:21:18,940 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 104 flow [2024-11-28 05:21:18,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-11-28 05:21:18,941 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2024-11-28 05:21:18,941 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 104 flow [2024-11-28 05:21:18,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:18,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:18,941 INFO L206 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] [2024-11-28 05:21:18,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:21:18,942 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:21:18,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1185517184, now seen corresponding path program 1 times [2024-11-28 05:21:18,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:18,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132103616] [2024-11-28 05:21:18,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:18,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:19,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:19,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132103616] [2024-11-28 05:21:19,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132103616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:19,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:19,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:21:19,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587604201] [2024-11-28 05:21:19,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:19,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:21:19,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:19,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:21:19,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:21:19,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-11-28 05:21:19,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:19,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:19,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-11-28 05:21:19,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:19,296 INFO L124 PetriNetUnfolderBase]: 93/211 cut-off events. [2024-11-28 05:21:19,297 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-28 05:21:19,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 211 events. 93/211 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 774 event pairs, 66 based on Foata normal form. 7/209 useless extension candidates. Maximal degree in co-relation 476. Up to 151 conditions per place. [2024-11-28 05:21:19,300 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 24 selfloop transitions, 2 changer transitions 10/41 dead transitions. [2024-11-28 05:21:19,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 206 flow [2024-11-28 05:21:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:21:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:21:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-28 05:21:19,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-28 05:21:19,302 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 104 flow. Second operand 4 states and 60 transitions. [2024-11-28 05:21:19,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 206 flow [2024-11-28 05:21:19,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 198 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:19,305 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 112 flow [2024-11-28 05:21:19,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-11-28 05:21:19,310 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-11-28 05:21:19,310 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 112 flow [2024-11-28 05:21:19,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:19,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:19,311 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:19,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:21:19,312 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:21:19,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -447440202, now seen corresponding path program 1 times [2024-11-28 05:21:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:19,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848065710] [2024-11-28 05:21:19,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:19,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:21:22,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:22,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848065710] [2024-11-28 05:21:22,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848065710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:22,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171293261] [2024-11-28 05:21:22,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:22,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:22,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:22,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:22,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:21:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:22,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:21:22,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:22,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:21:23,653 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-28 05:21:23,654 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 48 treesize of output 20 [2024-11-28 05:21:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:23,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:25,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:21:25,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 324 [2024-11-28 05:21:26,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:21:26,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 05:21:26,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:21:26,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-28 05:21:26,360 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:21:26,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2024-11-28 05:21:26,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:21:26,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-11-28 05:21:26,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:21:26,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-11-28 05:21:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:21:26,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-11-28 05:21:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:21:27,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-11-28 05:21:27,039 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:21:27,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2024-11-28 05:21:27,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:21:27,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 77 [2024-11-28 05:21:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:27,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171293261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:27,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:27,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-28 05:21:27,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24952791] [2024-11-28 05:21:27,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:27,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 05:21:27,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:27,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 05:21:27,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:21:27,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:21:27,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 112 flow. Second operand has 38 states, 38 states have (on average 6.684210526315789) internal successors, (254), 38 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:27,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:27,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:21:27,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:41,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 05:22:06,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:22:10,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:22:10,251 INFO L124 PetriNetUnfolderBase]: 1188/2168 cut-off events. [2024-11-28 05:22:10,251 INFO L125 PetriNetUnfolderBase]: For 423/423 co-relation queries the response was YES. [2024-11-28 05:22:10,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5115 conditions, 2168 events. 1188/2168 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11835 event pairs, 34 based on Foata normal form. 8/1854 useless extension candidates. Maximal degree in co-relation 2925. Up to 391 conditions per place. [2024-11-28 05:22:10,261 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 316 selfloop transitions, 232 changer transitions 37/588 dead transitions. [2024-11-28 05:22:10,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 588 transitions, 2860 flow [2024-11-28 05:22:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-28 05:22:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2024-11-28 05:22:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 1097 transitions. [2024-11-28 05:22:10,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3917857142857143 [2024-11-28 05:22:10,278 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 112 flow. Second operand 100 states and 1097 transitions. [2024-11-28 05:22:10,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 588 transitions, 2860 flow [2024-11-28 05:22:10,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 588 transitions, 2842 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-28 05:22:10,292 INFO L231 Difference]: Finished difference. Result has 172 places, 271 transitions, 1716 flow [2024-11-28 05:22:10,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=1716, PETRI_PLACES=172, PETRI_TRANSITIONS=271} [2024-11-28 05:22:10,293 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 144 predicate places. [2024-11-28 05:22:10,293 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 271 transitions, 1716 flow [2024-11-28 05:22:10,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.684210526315789) internal successors, (254), 38 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:22:10,293 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:10,293 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:10,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:22:10,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:10,494 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:22:10,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1370655832, now seen corresponding path program 2 times [2024-11-28 05:22:10,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:10,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304089630] [2024-11-28 05:22:10,495 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:10,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:10,537 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:22:10,538 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:11,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304089630] [2024-11-28 05:22:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304089630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:22:11,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:22:11,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:22:11,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724847414] [2024-11-28 05:22:11,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:22:11,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:22:11,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:11,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:22:11,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:22:11,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:22:11,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 271 transitions, 1716 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:22:11,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:11,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:22:11,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:12,377 INFO L124 PetriNetUnfolderBase]: 1371/2467 cut-off events. [2024-11-28 05:22:12,378 INFO L125 PetriNetUnfolderBase]: For 27086/27086 co-relation queries the response was YES. [2024-11-28 05:22:12,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12834 conditions, 2467 events. 1371/2467 cut-off events. For 27086/27086 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13884 event pairs, 227 based on Foata normal form. 3/2455 useless extension candidates. Maximal degree in co-relation 12471. Up to 1935 conditions per place. [2024-11-28 05:22:12,416 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 278 selfloop transitions, 72 changer transitions 3/356 dead transitions. [2024-11-28 05:22:12,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 356 transitions, 3064 flow [2024-11-28 05:22:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:22:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:22:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-11-28 05:22:12,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-11-28 05:22:12,419 INFO L175 Difference]: Start difference. First operand has 172 places, 271 transitions, 1716 flow. Second operand 11 states and 130 transitions. [2024-11-28 05:22:12,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 356 transitions, 3064 flow [2024-11-28 05:22:12,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 356 transitions, 2708 flow, removed 166 selfloop flow, removed 5 redundant places. [2024-11-28 05:22:12,625 INFO L231 Difference]: Finished difference. Result has 179 places, 311 transitions, 1919 flow [2024-11-28 05:22:12,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1919, PETRI_PLACES=179, PETRI_TRANSITIONS=311} [2024-11-28 05:22:12,626 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 151 predicate places. [2024-11-28 05:22:12,628 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 311 transitions, 1919 flow [2024-11-28 05:22:12,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:22:12,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:12,628 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:12,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 05:22:12,629 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:22:12,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1005194654, now seen corresponding path program 3 times [2024-11-28 05:22:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:12,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238041832] [2024-11-28 05:22:12,629 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:22:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:12,675 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 05:22:12,678 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:13,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:13,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238041832] [2024-11-28 05:22:13,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238041832] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:22:13,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:22:13,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:22:13,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800722947] [2024-11-28 05:22:13,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:22:13,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:22:13,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:13,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:22:13,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:22:13,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:22:13,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 311 transitions, 1919 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:22:13,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:13,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:22:13,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:14,611 INFO L124 PetriNetUnfolderBase]: 1565/2799 cut-off events. [2024-11-28 05:22:14,612 INFO L125 PetriNetUnfolderBase]: For 30857/30857 co-relation queries the response was YES. [2024-11-28 05:22:14,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14623 conditions, 2799 events. 1565/2799 cut-off events. For 30857/30857 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16364 event pairs, 270 based on Foata normal form. 3/2787 useless extension candidates. Maximal degree in co-relation 14262. Up to 2293 conditions per place. [2024-11-28 05:22:14,651 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 309 selfloop transitions, 73 changer transitions 3/388 dead transitions. [2024-11-28 05:22:14,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 388 transitions, 3287 flow [2024-11-28 05:22:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:22:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:22:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-11-28 05:22:14,653 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-11-28 05:22:14,653 INFO L175 Difference]: Start difference. First operand has 179 places, 311 transitions, 1919 flow. Second operand 11 states and 130 transitions. [2024-11-28 05:22:14,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 388 transitions, 3287 flow [2024-11-28 05:22:14,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 388 transitions, 3202 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-11-28 05:22:14,840 INFO L231 Difference]: Finished difference. Result has 193 places, 345 transitions, 2368 flow [2024-11-28 05:22:14,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2368, PETRI_PLACES=193, PETRI_TRANSITIONS=345} [2024-11-28 05:22:14,843 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 165 predicate places. [2024-11-28 05:22:14,843 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 345 transitions, 2368 flow [2024-11-28 05:22:14,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:22:14,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:14,844 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:14,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:22:14,844 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:22:14,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -646657960, now seen corresponding path program 4 times [2024-11-28 05:22:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820395153] [2024-11-28 05:22:14,849 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:22:14,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:14,887 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:22:14,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:22:16,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:16,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820395153] [2024-11-28 05:22:16,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820395153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:16,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42498951] [2024-11-28 05:22:16,551 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:22:16,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:16,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:16,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:16,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:22:16,639 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:22:16,639 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:16,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:22:16,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:16,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:22:17,650 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-28 05:22:17,651 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 52 treesize of output 20 [2024-11-28 05:22:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:17,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:19,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:19,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 297 [2024-11-28 05:22:19,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:19,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-11-28 05:22:19,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:19,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:22:19,965 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:22:19,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2024-11-28 05:22:19,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:19,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-28 05:22:19,994 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:22:19,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2024-11-28 05:22:20,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:20,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 05:22:20,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:20,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 05:22:20,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:20,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 05:22:20,304 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:22:20,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2024-11-28 05:22:20,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:20,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 62 [2024-11-28 05:22:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:20,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42498951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:20,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:20,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2024-11-28 05:22:20,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456265369] [2024-11-28 05:22:20,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:20,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 05:22:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:20,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 05:22:20,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:22:21,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:22:21,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 345 transitions, 2368 flow. Second operand has 35 states, 35 states have (on average 6.771428571428571) internal successors, (237), 35 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) [2024-11-28 05:22:21,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:21,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:22:21,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:30,247 INFO L124 PetriNetUnfolderBase]: 1902/3424 cut-off events. [2024-11-28 05:22:30,247 INFO L125 PetriNetUnfolderBase]: For 37460/37460 co-relation queries the response was YES. [2024-11-28 05:22:30,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18170 conditions, 3424 events. 1902/3424 cut-off events. For 37460/37460 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21353 event pairs, 98 based on Foata normal form. 5/3405 useless extension candidates. Maximal degree in co-relation 17782. Up to 942 conditions per place. [2024-11-28 05:22:30,283 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 299 selfloop transitions, 338 changer transitions 9/649 dead transitions. [2024-11-28 05:22:30,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 649 transitions, 6016 flow [2024-11-28 05:22:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 05:22:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-28 05:22:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 488 transitions. [2024-11-28 05:22:30,291 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-11-28 05:22:30,291 INFO L175 Difference]: Start difference. First operand has 193 places, 345 transitions, 2368 flow. Second operand 48 states and 488 transitions. [2024-11-28 05:22:30,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 649 transitions, 6016 flow [2024-11-28 05:22:30,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 649 transitions, 5926 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-28 05:22:30,453 INFO L231 Difference]: Finished difference. Result has 248 places, 485 transitions, 4942 flow [2024-11-28 05:22:30,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4942, PETRI_PLACES=248, PETRI_TRANSITIONS=485} [2024-11-28 05:22:30,454 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 220 predicate places. [2024-11-28 05:22:30,454 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 485 transitions, 4942 flow [2024-11-28 05:22:30,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.771428571428571) internal successors, (237), 35 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) [2024-11-28 05:22:30,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:30,455 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:30,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:22:30,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:30,655 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:22:30,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash -758590954, now seen corresponding path program 5 times [2024-11-28 05:22:30,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:30,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428970151] [2024-11-28 05:22:30,656 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:22:30,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:30,692 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:30,693 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:22:33,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428970151] [2024-11-28 05:22:33,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428970151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242035530] [2024-11-28 05:22:33,412 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:22:33,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:33,414 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:33,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:22:33,503 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:33,503 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:33,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:22:33,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:33,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:22:34,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:34,525 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 46 treesize of output 34 [2024-11-28 05:22:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:34,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:36,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:36,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 318 treesize of output 324 [2024-11-28 05:22:38,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:38,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 05:22:38,135 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:22:38,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2024-11-28 05:22:38,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:38,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-28 05:22:39,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:39,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-11-28 05:22:39,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:39,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-11-28 05:22:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:39,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-11-28 05:22:39,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:22:39,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2024-11-28 05:22:39,502 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:22:39,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2024-11-28 05:22:41,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:41,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 458 treesize of output 1132 [2024-11-28 05:22:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:46,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242035530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:46,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:46,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-11-28 05:22:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000514434] [2024-11-28 05:22:46,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:46,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 05:22:46,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:46,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 05:22:46,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 05:22:46,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:22:46,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 485 transitions, 4942 flow. Second operand has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:22:46,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:46,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:22:46,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:56,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 05:23:00,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 05:23:08,566 INFO L124 PetriNetUnfolderBase]: 2520/4487 cut-off events. [2024-11-28 05:23:08,567 INFO L125 PetriNetUnfolderBase]: For 68469/68469 co-relation queries the response was YES. [2024-11-28 05:23:08,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28599 conditions, 4487 events. 2520/4487 cut-off events. For 68469/68469 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29264 event pairs, 135 based on Foata normal form. 11/4456 useless extension candidates. Maximal degree in co-relation 28032. Up to 1866 conditions per place. [2024-11-28 05:23:08,609 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 420 selfloop transitions, 457 changer transitions 4/884 dead transitions. [2024-11-28 05:23:08,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 884 transitions, 11024 flow [2024-11-28 05:23:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-28 05:23:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-11-28 05:23:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 589 transitions. [2024-11-28 05:23:08,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35059523809523807 [2024-11-28 05:23:08,612 INFO L175 Difference]: Start difference. First operand has 248 places, 485 transitions, 4942 flow. Second operand 60 states and 589 transitions. [2024-11-28 05:23:08,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 884 transitions, 11024 flow [2024-11-28 05:23:09,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 884 transitions, 10025 flow, removed 431 selfloop flow, removed 27 redundant places. [2024-11-28 05:23:09,149 INFO L231 Difference]: Finished difference. Result has 296 places, 703 transitions, 8700 flow [2024-11-28 05:23:09,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8700, PETRI_PLACES=296, PETRI_TRANSITIONS=703} [2024-11-28 05:23:09,150 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 268 predicate places. [2024-11-28 05:23:09,150 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 703 transitions, 8700 flow [2024-11-28 05:23:09,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.615384615384615) internal successors, (258), 39 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:09,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:23:09,151 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:09,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:23:09,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:09,351 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:23:09,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1623642096, now seen corresponding path program 6 times [2024-11-28 05:23:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:09,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126151300] [2024-11-28 05:23:09,352 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:23:09,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:09,389 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 05:23:09,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:23:10,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:10,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126151300] [2024-11-28 05:23:10,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126151300] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:10,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:10,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:23:10,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733121994] [2024-11-28 05:23:10,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:10,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:23:10,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:10,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:23:10,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:23:10,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:23:10,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 703 transitions, 8700 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:10,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:23:10,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:23:10,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:23:11,981 INFO L124 PetriNetUnfolderBase]: 2587/4601 cut-off events. [2024-11-28 05:23:11,981 INFO L125 PetriNetUnfolderBase]: For 67668/67668 co-relation queries the response was YES. [2024-11-28 05:23:12,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31124 conditions, 4601 events. 2587/4601 cut-off events. For 67668/67668 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30144 event pairs, 286 based on Foata normal form. 1/4596 useless extension candidates. Maximal degree in co-relation 30500. Up to 4252 conditions per place. [2024-11-28 05:23:12,023 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 677 selfloop transitions, 70 changer transitions 2/752 dead transitions. [2024-11-28 05:23:12,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 752 transitions, 10776 flow [2024-11-28 05:23:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:23:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:23:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-11-28 05:23:12,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2024-11-28 05:23:12,025 INFO L175 Difference]: Start difference. First operand has 296 places, 703 transitions, 8700 flow. Second operand 11 states and 129 transitions. [2024-11-28 05:23:12,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 752 transitions, 10776 flow [2024-11-28 05:23:12,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 752 transitions, 10101 flow, removed 294 selfloop flow, removed 20 redundant places. [2024-11-28 05:23:12,606 INFO L231 Difference]: Finished difference. Result has 289 places, 715 transitions, 8409 flow [2024-11-28 05:23:12,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8025, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8409, PETRI_PLACES=289, PETRI_TRANSITIONS=715} [2024-11-28 05:23:12,607 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 261 predicate places. [2024-11-28 05:23:12,607 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 715 transitions, 8409 flow [2024-11-28 05:23:12,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:12,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:23:12,607 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:12,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 05:23:12,607 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:23:12,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1975355380, now seen corresponding path program 7 times [2024-11-28 05:23:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:12,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285695481] [2024-11-28 05:23:12,608 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:23:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:15,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285695481] [2024-11-28 05:23:15,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285695481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784875095] [2024-11-28 05:23:15,302 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:23:15,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:15,305 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:15,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:23:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:15,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 05:23:15,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:15,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 05:23:15,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:23:15,637 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:23:15,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 05:23:15,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:23:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:17,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:24,244 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-28 05:23:24,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 468 [2024-11-28 05:23:24,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:23:24,293 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 357 treesize of output 341 [2024-11-28 05:23:25,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:23:25,094 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:23:25,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:23:25,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 67 [2024-11-28 05:23:25,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:23:25,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2024-11-28 05:23:25,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:23:25,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 200 [2024-11-28 05:23:26,302 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-28 05:23:26,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 298 treesize of output 316 [2024-11-28 05:23:26,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:23:26,362 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 203 treesize of output 199 [2024-11-28 05:23:26,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2024-11-28 05:23:27,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:23:27,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 320 treesize of output 326 [2024-11-28 05:23:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:29,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784875095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:29,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:29,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-11-28 05:23:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897012858] [2024-11-28 05:23:29,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:29,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 05:23:29,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:29,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 05:23:29,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1468, Unknown=1, NotChecked=0, Total=1640 [2024-11-28 05:23:29,306 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:23:29,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 715 transitions, 8409 flow. Second operand has 41 states, 41 states have (on average 6.536585365853658) internal successors, (268), 41 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:29,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:23:29,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:23:29,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:23:35,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:23:39,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:23:43,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:24:22,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:24:39,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:24:42,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:24:57,842 INFO L124 PetriNetUnfolderBase]: 3507/6266 cut-off events. [2024-11-28 05:24:57,842 INFO L125 PetriNetUnfolderBase]: For 74667/74667 co-relation queries the response was YES. [2024-11-28 05:24:57,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41112 conditions, 6266 events. 3507/6266 cut-off events. For 74667/74667 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 43016 event pairs, 104 based on Foata normal form. 11/6270 useless extension candidates. Maximal degree in co-relation 40468. Up to 1758 conditions per place. [2024-11-28 05:24:57,903 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 587 selfloop transitions, 762 changer transitions 20/1372 dead transitions. [2024-11-28 05:24:57,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1372 transitions, 18831 flow [2024-11-28 05:24:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-28 05:24:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-11-28 05:24:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 890 transitions. [2024-11-28 05:24:57,906 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36535303776683087 [2024-11-28 05:24:57,906 INFO L175 Difference]: Start difference. First operand has 289 places, 715 transitions, 8409 flow. Second operand 87 states and 890 transitions. [2024-11-28 05:24:57,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1372 transitions, 18831 flow [2024-11-28 05:24:58,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1372 transitions, 18533 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-11-28 05:24:58,572 INFO L231 Difference]: Finished difference. Result has 397 places, 1097 transitions, 16556 flow [2024-11-28 05:24:58,573 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8180, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=16556, PETRI_PLACES=397, PETRI_TRANSITIONS=1097} [2024-11-28 05:24:58,573 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 369 predicate places. [2024-11-28 05:24:58,573 INFO L471 AbstractCegarLoop]: Abstraction has has 397 places, 1097 transitions, 16556 flow [2024-11-28 05:24:58,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.536585365853658) internal successors, (268), 41 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:58,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:24:58,574 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:58,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:24:58,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:58,774 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:24:58,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:58,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1039711844, now seen corresponding path program 8 times [2024-11-28 05:24:58,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:58,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508013705] [2024-11-28 05:24:58,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:58,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:58,796 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:24:58,796 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:00,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:00,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508013705] [2024-11-28 05:25:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508013705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:00,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:00,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:25:00,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123125741] [2024-11-28 05:25:00,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:00,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:25:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:00,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:25:00,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:25:00,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:25:00,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1097 transitions, 16556 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:00,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:00,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:25:00,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:04,223 INFO L124 PetriNetUnfolderBase]: 3652/6519 cut-off events. [2024-11-28 05:25:04,223 INFO L125 PetriNetUnfolderBase]: For 108388/108388 co-relation queries the response was YES. [2024-11-28 05:25:04,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49687 conditions, 6519 events. 3652/6519 cut-off events. For 108388/108388 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 45258 event pairs, 322 based on Foata normal form. 2/6520 useless extension candidates. Maximal degree in co-relation 49270. Up to 5880 conditions per place. [2024-11-28 05:25:04,291 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 1052 selfloop transitions, 129 changer transitions 4/1188 dead transitions. [2024-11-28 05:25:04,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1188 transitions, 20315 flow [2024-11-28 05:25:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:25:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:25:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-11-28 05:25:04,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-11-28 05:25:04,293 INFO L175 Difference]: Start difference. First operand has 397 places, 1097 transitions, 16556 flow. Second operand 11 states and 131 transitions. [2024-11-28 05:25:04,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1188 transitions, 20315 flow [2024-11-28 05:25:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1188 transitions, 18952 flow, removed 652 selfloop flow, removed 17 redundant places. [2024-11-28 05:25:05,407 INFO L231 Difference]: Finished difference. Result has 394 places, 1134 transitions, 16355 flow [2024-11-28 05:25:05,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=15253, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16355, PETRI_PLACES=394, PETRI_TRANSITIONS=1134} [2024-11-28 05:25:05,409 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 366 predicate places. [2024-11-28 05:25:05,409 INFO L471 AbstractCegarLoop]: Abstraction has has 394 places, 1134 transitions, 16355 flow [2024-11-28 05:25:05,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:05,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:05,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:05,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 05:25:05,409 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:05,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:05,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1262847304, now seen corresponding path program 9 times [2024-11-28 05:25:05,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:05,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143261825] [2024-11-28 05:25:05,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:25:05,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:05,430 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 05:25:05,430 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:07,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:07,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143261825] [2024-11-28 05:25:07,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143261825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:07,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:07,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:25:07,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856167314] [2024-11-28 05:25:07,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:07,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:25:07,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:07,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:25:07,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:25:07,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:25:07,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1134 transitions, 16355 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:07,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:07,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:25:07,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:11,507 INFO L124 PetriNetUnfolderBase]: 3879/6902 cut-off events. [2024-11-28 05:25:11,508 INFO L125 PetriNetUnfolderBase]: For 108639/108639 co-relation queries the response was YES. [2024-11-28 05:25:11,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51595 conditions, 6902 events. 3879/6902 cut-off events. For 108639/108639 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 48219 event pairs, 320 based on Foata normal form. 2/6903 useless extension candidates. Maximal degree in co-relation 51178. Up to 5948 conditions per place. [2024-11-28 05:25:11,600 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 1072 selfloop transitions, 175 changer transitions 4/1254 dead transitions. [2024-11-28 05:25:11,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1254 transitions, 20665 flow [2024-11-28 05:25:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:25:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:25:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-11-28 05:25:11,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-11-28 05:25:11,601 INFO L175 Difference]: Start difference. First operand has 394 places, 1134 transitions, 16355 flow. Second operand 12 states and 142 transitions. [2024-11-28 05:25:11,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1254 transitions, 20665 flow [2024-11-28 05:25:12,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1254 transitions, 20526 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-11-28 05:25:12,798 INFO L231 Difference]: Finished difference. Result has 404 places, 1180 transitions, 17634 flow [2024-11-28 05:25:12,799 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=16218, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17634, PETRI_PLACES=404, PETRI_TRANSITIONS=1180} [2024-11-28 05:25:12,799 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 376 predicate places. [2024-11-28 05:25:12,799 INFO L471 AbstractCegarLoop]: Abstraction has has 404 places, 1180 transitions, 17634 flow [2024-11-28 05:25:12,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:12,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:12,800 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:12,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 05:25:12,800 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:25:12,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:12,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1199691250, now seen corresponding path program 10 times [2024-11-28 05:25:12,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:12,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904632353] [2024-11-28 05:25:12,801 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:25:12,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:12,828 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:25:12,828 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:17,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904632353] [2024-11-28 05:25:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904632353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123567926] [2024-11-28 05:25:17,087 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:25:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:17,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:17,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:25:17,177 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:25:17,177 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:17,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 05:25:17,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:17,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 05:25:17,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:25:17,800 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:25:17,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 05:25:18,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:25:20,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2024-11-28 05:25:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:21,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:31,277 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-28 05:25:31,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 218 [2024-11-28 05:25:31,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:25:31,353 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 191 treesize of output 189 [2024-11-28 05:25:31,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-28 05:25:32,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:25:32,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 264 [2024-11-28 05:25:37,088 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-28 05:25:37,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 373 treesize of output 355 [2024-11-28 05:25:37,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:25:37,163 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 328 treesize of output 318 [2024-11-28 05:25:37,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2024-11-28 05:25:38,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:25:38,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 352 treesize of output 334 [2024-11-28 05:25:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:45,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123567926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:45,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:45,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2024-11-28 05:25:45,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136857715] [2024-11-28 05:25:45,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:45,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 05:25:45,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:45,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 05:25:45,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1404, Unknown=1, NotChecked=0, Total=1560 [2024-11-28 05:25:46,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:25:46,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1180 transitions, 17634 flow. Second operand has 40 states, 40 states have (on average 6.575) internal successors, (263), 40 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) [2024-11-28 05:25:46,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:46,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:25:46,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:55,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:26:03,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:26:17,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:26:39,783 INFO L124 PetriNetUnfolderBase]: 4045/7192 cut-off events. [2024-11-28 05:26:39,783 INFO L125 PetriNetUnfolderBase]: For 118571/118571 co-relation queries the response was YES. [2024-11-28 05:26:39,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54943 conditions, 7192 events. 4045/7192 cut-off events. For 118571/118571 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 50775 event pairs, 204 based on Foata normal form. 6/7197 useless extension candidates. Maximal degree in co-relation 54522. Up to 2993 conditions per place. [2024-11-28 05:26:39,869 INFO L140 encePairwiseOnDemand]: 13/28 looper letters, 649 selfloop transitions, 743 changer transitions 5/1400 dead transitions. [2024-11-28 05:26:39,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1400 transitions, 23448 flow [2024-11-28 05:26:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 05:26:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-28 05:26:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 460 transitions. [2024-11-28 05:26:39,871 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-28 05:26:39,871 INFO L175 Difference]: Start difference. First operand has 404 places, 1180 transitions, 17634 flow. Second operand 46 states and 460 transitions. [2024-11-28 05:26:39,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1400 transitions, 23448 flow [2024-11-28 05:26:41,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1400 transitions, 23153 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-11-28 05:26:41,121 INFO L231 Difference]: Finished difference. Result has 457 places, 1239 transitions, 21486 flow [2024-11-28 05:26:41,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=17397, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=21486, PETRI_PLACES=457, PETRI_TRANSITIONS=1239} [2024-11-28 05:26:41,122 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 429 predicate places. [2024-11-28 05:26:41,122 INFO L471 AbstractCegarLoop]: Abstraction has has 457 places, 1239 transitions, 21486 flow [2024-11-28 05:26:41,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.575) internal successors, (263), 40 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) [2024-11-28 05:26:41,122 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:41,122 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:41,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:26:41,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:41,323 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:26:41,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1672917112, now seen corresponding path program 11 times [2024-11-28 05:26:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:26:41,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693155999] [2024-11-28 05:26:41,324 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:41,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:26:41,358 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:41,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:46,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:26:46,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693155999] [2024-11-28 05:26:46,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693155999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242297534] [2024-11-28 05:26:46,753 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:46,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:46,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:46,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:26:46,870 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:46,870 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:46,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 05:26:46,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:47,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:26:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:50,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:54,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:26:54,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 297 [2024-11-28 05:26:55,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:26:55,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 05:26:55,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:26:55,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 05:26:55,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:26:55,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 05:26:55,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:26:55,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 05:26:56,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:26:56,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-11-28 05:26:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:26:56,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:26:56,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:26:56,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-28 05:26:56,632 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:26:56,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2024-11-28 05:26:56,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:26:56,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:26:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:26:56,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:26:56,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:26:56,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-28 05:26:56,942 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:26:56,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2024-11-28 05:26:58,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:26:58,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 349 treesize of output 807 [2024-11-28 05:27:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:27:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242297534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:15,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:27:15,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 40 [2024-11-28 05:27:15,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239512624] [2024-11-28 05:27:15,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:15,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 05:27:15,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:27:15,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 05:27:15,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:27:15,663 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:27:15,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1239 transitions, 21486 flow. Second operand has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:15,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:27:15,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:27:15,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:28:56,752 INFO L124 PetriNetUnfolderBase]: 6909/12325 cut-off events. [2024-11-28 05:28:56,752 INFO L125 PetriNetUnfolderBase]: For 263747/263747 co-relation queries the response was YES. [2024-11-28 05:28:56,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104438 conditions, 12325 events. 6909/12325 cut-off events. For 263747/263747 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 94007 event pairs, 159 based on Foata normal form. 182/12506 useless extension candidates. Maximal degree in co-relation 103879. Up to 2344 conditions per place. [2024-11-28 05:28:56,977 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 930 selfloop transitions, 1824 changer transitions 39/2796 dead transitions. [2024-11-28 05:28:56,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 2796 transitions, 52904 flow [2024-11-28 05:28:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2024-11-28 05:28:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2024-11-28 05:28:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 1495 transitions. [2024-11-28 05:28:56,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3682266009852217 [2024-11-28 05:28:56,982 INFO L175 Difference]: Start difference. First operand has 457 places, 1239 transitions, 21486 flow. Second operand 145 states and 1495 transitions. [2024-11-28 05:28:56,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 2796 transitions, 52904 flow [2024-11-28 05:29:01,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2796 transitions, 52326 flow, removed 212 selfloop flow, removed 24 redundant places. [2024-11-28 05:29:01,077 INFO L231 Difference]: Finished difference. Result has 619 places, 2208 transitions, 45854 flow [2024-11-28 05:29:01,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=20499, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=45854, PETRI_PLACES=619, PETRI_TRANSITIONS=2208} [2024-11-28 05:29:01,079 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 591 predicate places. [2024-11-28 05:29:01,079 INFO L471 AbstractCegarLoop]: Abstraction has has 619 places, 2208 transitions, 45854 flow [2024-11-28 05:29:01,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 41 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:29:01,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:29:01,079 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:29:01,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:29:01,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:01,280 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:29:01,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:29:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash -378968016, now seen corresponding path program 12 times [2024-11-28 05:29:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:29:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283226950] [2024-11-28 05:29:01,282 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:29:01,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:29:01,310 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 05:29:01,310 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:29:02,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:29:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283226950] [2024-11-28 05:29:02,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283226950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:29:02,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:29:02,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:29:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649532578] [2024-11-28 05:29:02,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:29:02,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:29:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:29:02,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:29:02,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:29:02,974 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:29:02,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 2208 transitions, 45854 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:29:02,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:29:02,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:29:02,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:29:13,869 INFO L124 PetriNetUnfolderBase]: 7177/12749 cut-off events. [2024-11-28 05:29:13,869 INFO L125 PetriNetUnfolderBase]: For 403224/403224 co-relation queries the response was YES. [2024-11-28 05:29:14,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125557 conditions, 12749 events. 7177/12749 cut-off events. For 403224/403224 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 97191 event pairs, 578 based on Foata normal form. 2/12750 useless extension candidates. Maximal degree in co-relation 124851. Up to 11872 conditions per place. [2024-11-28 05:29:14,135 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 2178 selfloop transitions, 167 changer transitions 4/2352 dead transitions. [2024-11-28 05:29:14,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 2352 transitions, 53542 flow [2024-11-28 05:29:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:29:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:29:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-11-28 05:29:14,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-11-28 05:29:14,136 INFO L175 Difference]: Start difference. First operand has 619 places, 2208 transitions, 45854 flow. Second operand 11 states and 131 transitions. [2024-11-28 05:29:14,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 2352 transitions, 53542 flow [2024-11-28 05:29:21,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 2352 transitions, 49772 flow, removed 1814 selfloop flow, removed 16 redundant places. [2024-11-28 05:29:21,081 INFO L231 Difference]: Finished difference. Result has 615 places, 2274 transitions, 44196 flow [2024-11-28 05:29:21,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=42124, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=44196, PETRI_PLACES=615, PETRI_TRANSITIONS=2274} [2024-11-28 05:29:21,083 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 587 predicate places. [2024-11-28 05:29:21,083 INFO L471 AbstractCegarLoop]: Abstraction has has 615 places, 2274 transitions, 44196 flow [2024-11-28 05:29:21,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:29:21,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:29:21,083 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:29:21,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 05:29:21,084 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:29:21,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:29:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1617078068, now seen corresponding path program 13 times [2024-11-28 05:29:21,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:29:21,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334075467] [2024-11-28 05:29:21,085 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:29:21,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:29:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:29:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:29:26,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:29:26,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334075467] [2024-11-28 05:29:26,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334075467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:29:26,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574552354] [2024-11-28 05:29:26,190 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:29:26,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:26,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:29:26,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:29:26,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:29:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:29:26,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 05:29:26,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:29:26,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 05:29:26,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:29:26,957 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 05:29:26,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 05:29:27,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 05:29:27,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 05:29:29,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:29:29,686 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 52 treesize of output 36 [2024-11-28 05:29:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:29:30,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:29:36,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:29:36,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 73 [2024-11-28 05:29:36,973 INFO L349 Elim1Store]: treesize reduction 5, result has 94.6 percent of original size [2024-11-28 05:29:36,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 182 [2024-11-28 05:29:37,061 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 05:29:37,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:29:37,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 125 [2024-11-28 05:29:45,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:29:45,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 84 [2024-11-28 05:29:46,269 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-11-28 05:29:46,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 231 [2024-11-28 05:29:46,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:29:46,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 167 [2024-11-28 05:29:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:29:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574552354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:29:59,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:29:59,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 40 [2024-11-28 05:29:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889469460] [2024-11-28 05:29:59,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:29:59,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 05:29:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:29:59,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 05:29:59,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1492, Unknown=2, NotChecked=0, Total=1640 [2024-11-28 05:30:00,169 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:30:00,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 2274 transitions, 44196 flow. Second operand has 41 states, 41 states have (on average 6.634146341463414) internal successors, (272), 41 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:30:00,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:30:00,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:30:00,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:30:14,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 05:30:23,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 05:30:27,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 05:30:34,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:30:36,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 05:31:26,098 INFO L124 PetriNetUnfolderBase]: 8311/14791 cut-off events. [2024-11-28 05:31:26,098 INFO L125 PetriNetUnfolderBase]: For 411824/411824 co-relation queries the response was YES. [2024-11-28 05:31:26,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138681 conditions, 14791 events. 8311/14791 cut-off events. For 411824/411824 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 115944 event pairs, 431 based on Foata normal form. 21/14810 useless extension candidates. Maximal degree in co-relation 138025. Up to 8571 conditions per place. [2024-11-28 05:31:26,441 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 1816 selfloop transitions, 1213 changer transitions 9/3041 dead transitions. [2024-11-28 05:31:26,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 3041 transitions, 64057 flow [2024-11-28 05:31:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-28 05:31:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-11-28 05:31:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 796 transitions. [2024-11-28 05:31:26,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.334453781512605 [2024-11-28 05:31:26,444 INFO L175 Difference]: Start difference. First operand has 615 places, 2274 transitions, 44196 flow. Second operand 85 states and 796 transitions. [2024-11-28 05:31:26,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 3041 transitions, 64057 flow [2024-11-28 05:31:34,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 3041 transitions, 63530 flow, removed 178 selfloop flow, removed 7 redundant places. [2024-11-28 05:31:34,496 INFO L231 Difference]: Finished difference. Result has 726 places, 2715 transitions, 58447 flow [2024-11-28 05:31:34,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=43896, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=823, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=58447, PETRI_PLACES=726, PETRI_TRANSITIONS=2715} [2024-11-28 05:31:34,499 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 698 predicate places. [2024-11-28 05:31:34,499 INFO L471 AbstractCegarLoop]: Abstraction has has 726 places, 2715 transitions, 58447 flow [2024-11-28 05:31:34,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.634146341463414) internal successors, (272), 41 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:31:34,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:31:34,500 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:31:34,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:31:34,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26214dd7-44d5-4142-a923-676708fc5265/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:31:34,701 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:31:34,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:31:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1091897220, now seen corresponding path program 14 times [2024-11-28 05:31:34,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:31:34,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723486059] [2024-11-28 05:31:34,702 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:31:34,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:31:34,726 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:31:34,726 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:31:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:31:36,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:31:36,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723486059] [2024-11-28 05:31:36,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723486059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:31:36,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:31:36,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:31:36,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703640568] [2024-11-28 05:31:36,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:31:36,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:31:36,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:31:36,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:31:36,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:31:36,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:31:36,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 2715 transitions, 58447 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:31:36,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:31:36,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:31:36,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:31:50,650 INFO L124 PetriNetUnfolderBase]: 8465/15091 cut-off events. [2024-11-28 05:31:50,650 INFO L125 PetriNetUnfolderBase]: For 492492/492492 co-relation queries the response was YES. [2024-11-28 05:31:51,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150731 conditions, 15091 events. 8465/15091 cut-off events. For 492492/492492 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 118749 event pairs, 626 based on Foata normal form. 2/15093 useless extension candidates. Maximal degree in co-relation 150056. Up to 13096 conditions per place. [2024-11-28 05:31:51,108 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 2476 selfloop transitions, 398 changer transitions 6/2883 dead transitions. [2024-11-28 05:31:51,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 2883 transitions, 67911 flow [2024-11-28 05:31:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:31:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:31:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 156 transitions. [2024-11-28 05:31:51,109 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-28 05:31:51,109 INFO L175 Difference]: Start difference. First operand has 726 places, 2715 transitions, 58447 flow. Second operand 13 states and 156 transitions. [2024-11-28 05:31:51,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 2883 transitions, 67911 flow [2024-11-28 05:32:01,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 2883 transitions, 65974 flow, removed 951 selfloop flow, removed 7 redundant places. [2024-11-28 05:32:01,868 INFO L231 Difference]: Finished difference. Result has 735 places, 2757 transitions, 58987 flow [2024-11-28 05:32:01,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=56664, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=58987, PETRI_PLACES=735, PETRI_TRANSITIONS=2757} [2024-11-28 05:32:01,870 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 707 predicate places. [2024-11-28 05:32:01,870 INFO L471 AbstractCegarLoop]: Abstraction has has 735 places, 2757 transitions, 58987 flow [2024-11-28 05:32:01,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:32:01,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:32:01,870 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:32:01,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 05:32:01,870 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:32:01,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:32:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash 192486790, now seen corresponding path program 15 times [2024-11-28 05:32:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:32:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855782535] [2024-11-28 05:32:01,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:32:01,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:32:01,889 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 05:32:01,889 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:32:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:32:03,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:32:03,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855782535] [2024-11-28 05:32:03,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855782535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:32:03,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:32:03,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:32:03,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632470790] [2024-11-28 05:32:03,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:32:03,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:32:03,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:32:03,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:32:03,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:32:03,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-28 05:32:03,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 2757 transitions, 58987 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:32:03,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:32:03,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-28 05:32:03,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand