./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/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_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/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_00c31764-fd63-455d-8fe6-c2fedab6096a/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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:18:54,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:18:54,833 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:18:54,838 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:18:54,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:18:54,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:18:54,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:18:54,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:18:54,862 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:18:54,862 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:18:54,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:18:54,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:18:54,863 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:18:54,863 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:18:54,863 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:18:54,863 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:18:54,863 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:18:54,863 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:18:54,864 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:18:54,865 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:18:54,865 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:18:54,865 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:18:54,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:18:54,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:18:54,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:18:54,865 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:18:54,865 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:18:54,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:18:54,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:18:54,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:18:54,866 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:18:54,867 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_00c31764-fd63-455d-8fe6-c2fedab6096a/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 -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-11-27 23:18:55,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:18:55,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:18:55,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:18:55,129 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:18:55,130 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:18:55,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-27 23:18:58,059 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/data/ea6e8410c/02afdd54411c45e7a001cf7030e39997/FLAG6df6297e1 [2024-11-27 23:18:58,349 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:18:58,350 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-27 23:18:58,358 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/data/ea6e8410c/02afdd54411c45e7a001cf7030e39997/FLAG6df6297e1 [2024-11-27 23:18:58,373 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/data/ea6e8410c/02afdd54411c45e7a001cf7030e39997 [2024-11-27 23:18:58,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:18:58,378 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:18:58,379 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:18:58,379 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:18:58,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:18:58,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491c91cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58, skipping insertion in model container [2024-11-27 23:18:58,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,410 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:18:58,633 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_00c31764-fd63-455d-8fe6-c2fedab6096a/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2024-11-27 23:18:58,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:18:58,665 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:18:58,696 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_00c31764-fd63-455d-8fe6-c2fedab6096a/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2024-11-27 23:18:58,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:18:58,725 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:18:58,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58 WrapperNode [2024-11-27 23:18:58,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:18:58,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:18:58,730 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:18:58,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:18:58,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,751 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,791 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 259 [2024-11-27 23:18:58,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:18:58,794 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:18:58,794 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:18:58,794 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:18:58,804 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,812 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,838 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-27 23:18:58,841 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,854 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,859 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,867 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,869 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,870 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:18:58,880 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:18:58,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:18:58,880 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:18:58,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (1/1) ... [2024-11-27 23:18:58,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:18:58,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:58,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:18:58,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:18:58,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:18:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 23:18:58,952 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 23:18:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 23:18:58,952 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 23:18:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 23:18:58,952 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 23:18:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:18:58,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:18:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:18:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:18:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:18:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:18:58,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:18:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:18:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:18:58,955 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 23:18:59,093 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:18:59,095 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:18:59,716 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 23:18:59,717 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:19:00,247 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:19:00,248 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 23:19:00,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:19:00 BoogieIcfgContainer [2024-11-27 23:19:00,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:19:00,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:19:00,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:19:00,261 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:19:00,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:18:58" (1/3) ... [2024-11-27 23:19:00,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f8c2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:19:00, skipping insertion in model container [2024-11-27 23:19:00,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:18:58" (2/3) ... [2024-11-27 23:19:00,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f8c2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:19:00, skipping insertion in model container [2024-11-27 23:19:00,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:19:00" (3/3) ... [2024-11-27 23:19:00,264 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-11-27 23:19:00,282 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:19:00,284 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-three-array-sum-alt.wvr.c that has 4 procedures, 26 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-27 23:19:00,284 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 23:19:00,355 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 23:19:00,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-11-27 23:19:00,467 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-11-27 23:19:00,471 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 23:19:00,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-27 23:19:00,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-11-27 23:19:00,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-11-27 23:19:00,496 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:19:00,512 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;@68f01213, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:19:00,512 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 23:19:00,536 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:19:00,536 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-11-27 23:19:00,536 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 23:19:00,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:00,537 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] [2024-11-27 23:19:00,537 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:00,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:00,551 INFO L85 PathProgramCache]: Analyzing trace with hash 463725283, now seen corresponding path program 1 times [2024-11-27 23:19:00,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:00,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577565625] [2024-11-27 23:19:00,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:00,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:19:01,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:01,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577565625] [2024-11-27 23:19:01,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577565625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:19:01,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:19:01,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:19:01,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81077591] [2024-11-27 23:19:01,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:19:01,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:19:01,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:01,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:19:01,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:19:01,257 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:01,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:01,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:01,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:01,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:01,525 INFO L124 PetriNetUnfolderBase]: 389/571 cut-off events. [2024-11-27 23:19:01,527 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-27 23:19:01,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 571 events. 389/571 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1784 event pairs, 124 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-11-27 23:19:01,541 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 38 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2024-11-27 23:19:01,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 207 flow [2024-11-27 23:19:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:19:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:19:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-11-27 23:19:01,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-11-27 23:19:01,561 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 56 transitions. [2024-11-27 23:19:01,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 207 flow [2024-11-27 23:19:01,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 185 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 23:19:01,573 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 86 flow [2024-11-27 23:19:01,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2024-11-27 23:19:01,581 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-11-27 23:19:01,582 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 86 flow [2024-11-27 23:19:01,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:01,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:01,582 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] [2024-11-27 23:19:01,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:19:01,583 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:01,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:01,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1231016386, now seen corresponding path program 1 times [2024-11-27 23:19:01,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:01,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017675099] [2024-11-27 23:19:01,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:01,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:19:01,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017675099] [2024-11-27 23:19:01,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017675099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:19:01,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:19:01,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:19:01,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865299971] [2024-11-27 23:19:01,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:19:01,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:19:01,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:01,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:19:01,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:19:01,965 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:01,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:01,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:01,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:01,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:02,359 INFO L124 PetriNetUnfolderBase]: 707/1060 cut-off events. [2024-11-27 23:19:02,359 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2024-11-27 23:19:02,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 1060 events. 707/1060 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3817 event pairs, 401 based on Foata normal form. 46/1100 useless extension candidates. Maximal degree in co-relation 914. Up to 571 conditions per place. [2024-11-27 23:19:02,370 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 58 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-11-27 23:19:02,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 71 transitions, 338 flow [2024-11-27 23:19:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:19:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 23:19:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-27 23:19:02,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-11-27 23:19:02,374 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 86 flow. Second operand 6 states and 90 transitions. [2024-11-27 23:19:02,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 71 transitions, 338 flow [2024-11-27 23:19:02,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 71 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:19:02,378 INFO L231 Difference]: Finished difference. Result has 36 places, 40 transitions, 166 flow [2024-11-27 23:19:02,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=36, PETRI_TRANSITIONS=40} [2024-11-27 23:19:02,379 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-11-27 23:19:02,380 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 40 transitions, 166 flow [2024-11-27 23:19:02,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:02,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:02,380 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] [2024-11-27 23:19:02,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:19:02,381 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:02,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:02,383 INFO L85 PathProgramCache]: Analyzing trace with hash 951035422, now seen corresponding path program 1 times [2024-11-27 23:19:02,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:02,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193349718] [2024-11-27 23:19:02,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:02,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:19:02,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:02,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193349718] [2024-11-27 23:19:02,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193349718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:19:02,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:19:02,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:19:02,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385643450] [2024-11-27 23:19:02,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:19:02,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:19:02,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:02,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:19:02,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:19:02,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:02,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 40 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:02,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:02,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:02,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:03,000 INFO L124 PetriNetUnfolderBase]: 615/941 cut-off events. [2024-11-27 23:19:03,000 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2024-11-27 23:19:03,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 941 events. 615/941 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3318 event pairs, 372 based on Foata normal form. 41/982 useless extension candidates. Maximal degree in co-relation 1483. Up to 571 conditions per place. [2024-11-27 23:19:03,009 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-11-27 23:19:03,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 374 flow [2024-11-27 23:19:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:19:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 23:19:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2024-11-27 23:19:03,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2024-11-27 23:19:03,013 INFO L175 Difference]: Start difference. First operand has 36 places, 40 transitions, 166 flow. Second operand 6 states and 85 transitions. [2024-11-27 23:19:03,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 374 flow [2024-11-27 23:19:03,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 66 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 23:19:03,019 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 208 flow [2024-11-27 23:19:03,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2024-11-27 23:19:03,020 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-11-27 23:19:03,021 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 208 flow [2024-11-27 23:19:03,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:03,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:03,022 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] [2024-11-27 23:19:03,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:19:03,022 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:03,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash 144424841, now seen corresponding path program 1 times [2024-11-27 23:19:03,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:03,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570234969] [2024-11-27 23:19:03,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:19:03,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570234969] [2024-11-27 23:19:03,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570234969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:19:03,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:19:03,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:19:03,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684508766] [2024-11-27 23:19:03,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:19:03,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:19:03,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:03,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:19:03,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:19:03,241 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:03,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:03,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:03,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:03,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:03,481 INFO L124 PetriNetUnfolderBase]: 515/794 cut-off events. [2024-11-27 23:19:03,482 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2024-11-27 23:19:03,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 794 events. 515/794 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2674 event pairs, 333 based on Foata normal form. 22/816 useless extension candidates. Maximal degree in co-relation 1648. Up to 571 conditions per place. [2024-11-27 23:19:03,486 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 26 selfloop transitions, 6 changer transitions 27/60 dead transitions. [2024-11-27 23:19:03,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 386 flow [2024-11-27 23:19:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:19:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 23:19:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2024-11-27 23:19:03,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-11-27 23:19:03,488 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 208 flow. Second operand 6 states and 81 transitions. [2024-11-27 23:19:03,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 386 flow [2024-11-27 23:19:03,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 368 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:19:03,492 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 152 flow [2024-11-27 23:19:03,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2024-11-27 23:19:03,493 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-11-27 23:19:03,493 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 152 flow [2024-11-27 23:19:03,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:03,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:03,493 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] [2024-11-27 23:19:03,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:19:03,494 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:03,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash 721342391, now seen corresponding path program 1 times [2024-11-27 23:19:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:03,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924289137] [2024-11-27 23:19:03,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:03,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:03,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:03,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924289137] [2024-11-27 23:19:03,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924289137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:03,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734125645] [2024-11-27 23:19:03,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:03,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:03,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:03,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:03,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:19:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:03,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:19:03,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:03,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734125645] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:04,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:19:04,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-27 23:19:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87758560] [2024-11-27 23:19:04,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:19:04,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:19:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:04,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:19:04,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:19:04,022 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:04,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:04,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:04,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:04,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:04,229 INFO L124 PetriNetUnfolderBase]: 377/554 cut-off events. [2024-11-27 23:19:04,229 INFO L125 PetriNetUnfolderBase]: For 543/543 co-relation queries the response was YES. [2024-11-27 23:19:04,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1733 conditions, 554 events. 377/554 cut-off events. For 543/543 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1671 event pairs, 150 based on Foata normal form. 50/604 useless extension candidates. Maximal degree in co-relation 1712. Up to 385 conditions per place. [2024-11-27 23:19:04,234 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-11-27 23:19:04,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 296 flow [2024-11-27 23:19:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:19:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:19:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-27 23:19:04,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-11-27 23:19:04,239 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 152 flow. Second operand 5 states and 59 transitions. [2024-11-27 23:19:04,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 296 flow [2024-11-27 23:19:04,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 240 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-11-27 23:19:04,248 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 133 flow [2024-11-27 23:19:04,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2024-11-27 23:19:04,249 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-11-27 23:19:04,249 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 133 flow [2024-11-27 23:19:04,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:04,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:04,251 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] [2024-11-27 23:19:04,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:19:04,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:04,455 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:04,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash -541613691, now seen corresponding path program 1 times [2024-11-27 23:19:04,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:04,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535800968] [2024-11-27 23:19:04,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:04,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:04,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535800968] [2024-11-27 23:19:04,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535800968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:04,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638389596] [2024-11-27 23:19:04,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:04,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:04,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:04,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:19:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:04,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:19:04,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:04,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638389596] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:04,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:19:04,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-27 23:19:04,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022293379] [2024-11-27 23:19:04,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:19:04,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:19:04,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:04,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:19:04,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:19:04,919 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:04,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:04,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:04,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:04,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:05,078 INFO L124 PetriNetUnfolderBase]: 383/560 cut-off events. [2024-11-27 23:19:05,078 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-11-27 23:19:05,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 560 events. 383/560 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1695 event pairs, 164 based on Foata normal form. 42/602 useless extension candidates. Maximal degree in co-relation 1521. Up to 418 conditions per place. [2024-11-27 23:19:05,082 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 43 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-11-27 23:19:05,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 286 flow [2024-11-27 23:19:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:19:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:19:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-11-27 23:19:05,083 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-11-27 23:19:05,083 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 133 flow. Second operand 5 states and 60 transitions. [2024-11-27 23:19:05,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 286 flow [2024-11-27 23:19:05,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 49 transitions, 268 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-27 23:19:05,085 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 143 flow [2024-11-27 23:19:05,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-11-27 23:19:05,086 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-11-27 23:19:05,086 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 143 flow [2024-11-27 23:19:05,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:05,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:05,087 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, 1] [2024-11-27 23:19:05,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:19:05,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:05,291 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:05,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1698826198, now seen corresponding path program 1 times [2024-11-27 23:19:05,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:05,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265873717] [2024-11-27 23:19:05,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:19:05,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:05,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265873717] [2024-11-27 23:19:05,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265873717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788572826] [2024-11-27 23:19:05,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:05,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:05,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:05,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:05,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:19:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:05,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:19:05,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:19:05,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:19:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788572826] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:05,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:19:05,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-27 23:19:05,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167417582] [2024-11-27 23:19:05,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:19:05,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:19:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:05,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:19:05,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:19:05,791 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:05,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:05,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:05,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:05,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:05,995 INFO L124 PetriNetUnfolderBase]: 432/630 cut-off events. [2024-11-27 23:19:05,995 INFO L125 PetriNetUnfolderBase]: For 562/562 co-relation queries the response was YES. [2024-11-27 23:19:05,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1892 conditions, 630 events. 432/630 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1847 event pairs, 202 based on Foata normal form. 37/667 useless extension candidates. Maximal degree in co-relation 1851. Up to 502 conditions per place. [2024-11-27 23:19:06,001 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 43 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-11-27 23:19:06,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 302 flow [2024-11-27 23:19:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:19:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:19:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-11-27 23:19:06,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-11-27 23:19:06,002 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 143 flow. Second operand 5 states and 58 transitions. [2024-11-27 23:19:06,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 302 flow [2024-11-27 23:19:06,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 284 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-27 23:19:06,007 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 153 flow [2024-11-27 23:19:06,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-27 23:19:06,008 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2024-11-27 23:19:06,008 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 153 flow [2024-11-27 23:19:06,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:06,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:06,009 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, 1, 1] [2024-11-27 23:19:06,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:19:06,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:06,209 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:06,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:06,210 INFO L85 PathProgramCache]: Analyzing trace with hash -873711880, now seen corresponding path program 1 times [2024-11-27 23:19:06,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:06,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234926295] [2024-11-27 23:19:06,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:19:08,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234926295] [2024-11-27 23:19:08,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234926295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10372197] [2024-11-27 23:19:08,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:08,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:08,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:08,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:19:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:08,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-27 23:19:08,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:08,409 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 [2024-11-27 23:19:08,488 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:19:08,489 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 [2024-11-27 23:19:08,888 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-11-27 23:19:08,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-11-27 23:19:09,006 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 28 treesize of output 12 [2024-11-27 23:19:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:09,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:13,447 WARN L851 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse2 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse0 (select (select |c_#memory_int#1| c_~B~0.base) (+ .cse2 ~B~0.offset))) (.cse1 (select (select |c_#memory_int#1| c_~A~0.base) (+ .cse2 c_~A~0.offset)))) (= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) (+ .cse2 ~C~0.offset) (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))))))) is different from false [2024-11-27 23:19:17,885 WARN L851 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (select (select |c_#memory_int#1| c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select |c_#memory_int#1| c_~B~0.base) ~B~0.offset))) (= (+ c_~csum~0 .cse0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset)))))) is different from false [2024-11-27 23:19:18,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:19:18,224 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 40 [2024-11-27 23:19:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-11-27 23:19:18,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10372197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:18,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:18,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2024-11-27 23:19:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799417591] [2024-11-27 23:19:18,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:18,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 23:19:18,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:18,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 23:19:18,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=758, Unknown=2, NotChecked=114, Total=992 [2024-11-27 23:19:18,902 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:18,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 153 flow. Second operand has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:18,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:18,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:22,993 INFO L124 PetriNetUnfolderBase]: 618/900 cut-off events. [2024-11-27 23:19:22,993 INFO L125 PetriNetUnfolderBase]: For 692/692 co-relation queries the response was YES. [2024-11-27 23:19:22,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2854 conditions, 900 events. 618/900 cut-off events. For 692/692 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3025 event pairs, 27 based on Foata normal form. 1/901 useless extension candidates. Maximal degree in co-relation 2812. Up to 659 conditions per place. [2024-11-27 23:19:22,999 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 65 selfloop transitions, 30 changer transitions 1/97 dead transitions. [2024-11-27 23:19:22,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 579 flow [2024-11-27 23:19:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:19:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 23:19:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2024-11-27 23:19:23,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3311827956989247 [2024-11-27 23:19:23,001 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 153 flow. Second operand 15 states and 154 transitions. [2024-11-27 23:19:23,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 579 flow [2024-11-27 23:19:23,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 97 transitions, 552 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-27 23:19:23,004 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 334 flow [2024-11-27 23:19:23,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=334, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2024-11-27 23:19:23,005 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-11-27 23:19:23,005 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 334 flow [2024-11-27 23:19:23,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:23,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:23,006 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, 1, 1] [2024-11-27 23:19:23,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:19:23,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:23,210 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:23,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash 226151920, now seen corresponding path program 2 times [2024-11-27 23:19:23,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509756026] [2024-11-27 23:19:23,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:19:23,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:23,285 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:19:23,286 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:19:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509756026] [2024-11-27 23:19:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509756026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942844070] [2024-11-27 23:19:25,016 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:19:25,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:25,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:25,020 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:25,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:19:25,139 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:19:25,140 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:25,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-27 23:19:25,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:26,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:19:26,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-11-27 23:19:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:26,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:26,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:19:26,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2024-11-27 23:19:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:27,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942844070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:27,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:27,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 26 [2024-11-27 23:19:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413122067] [2024-11-27 23:19:27,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:27,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 23:19:27,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:27,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 23:19:27,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:19:27,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:27,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 334 flow. Second operand has 27 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 27 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:27,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:27,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:27,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:29,169 INFO L124 PetriNetUnfolderBase]: 720/1047 cut-off events. [2024-11-27 23:19:29,169 INFO L125 PetriNetUnfolderBase]: For 1409/1409 co-relation queries the response was YES. [2024-11-27 23:19:29,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 1047 events. 720/1047 cut-off events. For 1409/1409 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3563 event pairs, 117 based on Foata normal form. 1/1048 useless extension candidates. Maximal degree in co-relation 3878. Up to 894 conditions per place. [2024-11-27 23:19:29,179 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 69 selfloop transitions, 35 changer transitions 1/106 dead transitions. [2024-11-27 23:19:29,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 788 flow [2024-11-27 23:19:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:19:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:19:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 133 transitions. [2024-11-27 23:19:29,184 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33002481389578164 [2024-11-27 23:19:29,184 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 334 flow. Second operand 13 states and 133 transitions. [2024-11-27 23:19:29,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 788 flow [2024-11-27 23:19:29,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 106 transitions, 715 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-11-27 23:19:29,192 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 544 flow [2024-11-27 23:19:29,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=544, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2024-11-27 23:19:29,194 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-11-27 23:19:29,195 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 544 flow [2024-11-27 23:19:29,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 27 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:29,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:29,195 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, 1, 1] [2024-11-27 23:19:29,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:19:29,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-27 23:19:29,396 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:29,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1441927402, now seen corresponding path program 3 times [2024-11-27 23:19:29,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:29,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800321140] [2024-11-27 23:19:29,396 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:19:29,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:29,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:19:29,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:19:31,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800321140] [2024-11-27 23:19:31,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800321140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554581428] [2024-11-27 23:19:31,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:19:31,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:31,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:31,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:31,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:19:31,342 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:19:31,342 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:31,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-27 23:19:31,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:32,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:19:32,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-11-27 23:19:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:32,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:32,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:19:32,894 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 38 treesize of output 87 [2024-11-27 23:19:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:33,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554581428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:33,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:33,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 27 [2024-11-27 23:19:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857263862] [2024-11-27 23:19:33,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:33,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:19:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:33,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:19:33,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:19:33,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:19:33,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 544 flow. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:33,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:19:33,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:19:33,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:19:35,664 INFO L124 PetriNetUnfolderBase]: 841/1221 cut-off events. [2024-11-27 23:19:35,665 INFO L125 PetriNetUnfolderBase]: For 2544/2544 co-relation queries the response was YES. [2024-11-27 23:19:35,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5054 conditions, 1221 events. 841/1221 cut-off events. For 2544/2544 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4314 event pairs, 144 based on Foata normal form. 1/1222 useless extension candidates. Maximal degree in co-relation 5002. Up to 1045 conditions per place. [2024-11-27 23:19:35,673 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 84 selfloop transitions, 45 changer transitions 1/131 dead transitions. [2024-11-27 23:19:35,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 1081 flow [2024-11-27 23:19:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:19:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:19:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 138 transitions. [2024-11-27 23:19:35,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3424317617866005 [2024-11-27 23:19:35,675 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 544 flow. Second operand 13 states and 138 transitions. [2024-11-27 23:19:35,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 1081 flow [2024-11-27 23:19:35,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 131 transitions, 1035 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-11-27 23:19:35,685 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 817 flow [2024-11-27 23:19:35,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=817, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-11-27 23:19:35,686 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-11-27 23:19:35,686 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 817 flow [2024-11-27 23:19:35,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:35,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:19:35,687 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, 1, 1] [2024-11-27 23:19:35,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:19:35,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 23:19:35,888 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:19:35,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1671497982, now seen corresponding path program 4 times [2024-11-27 23:19:35,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:35,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120965997] [2024-11-27 23:19:35,890 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:19:35,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:35,949 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:19:35,949 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:19:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120965997] [2024-11-27 23:19:37,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120965997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567072798] [2024-11-27 23:19:37,694 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:19:37,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:37,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:37,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:19:37,819 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:19:37,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:37,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:19:37,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:38,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:19:38,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-11-27 23:19:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:19:38,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:27,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:20:27,274 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 38 treesize of output 87 [2024-11-27 23:20:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:20:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567072798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:20:28,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:20:28,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 24 [2024-11-27 23:20:28,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495208533] [2024-11-27 23:20:28,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:28,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 23:20:28,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:28,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 23:20:28,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=502, Unknown=12, NotChecked=0, Total=600 [2024-11-27 23:20:28,430 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:20:28,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 817 flow. Second operand has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:28,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:20:28,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:20:28,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:20:32,948 INFO L124 PetriNetUnfolderBase]: 952/1381 cut-off events. [2024-11-27 23:20:32,948 INFO L125 PetriNetUnfolderBase]: For 4337/4337 co-relation queries the response was YES. [2024-11-27 23:20:32,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6238 conditions, 1381 events. 952/1381 cut-off events. For 4337/4337 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4967 event pairs, 214 based on Foata normal form. 1/1382 useless extension candidates. Maximal degree in co-relation 6180. Up to 1200 conditions per place. [2024-11-27 23:20:32,960 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 89 selfloop transitions, 54 changer transitions 1/145 dead transitions. [2024-11-27 23:20:32,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 145 transitions, 1394 flow [2024-11-27 23:20:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:20:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 23:20:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 142 transitions. [2024-11-27 23:20:32,963 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3053763440860215 [2024-11-27 23:20:32,964 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 817 flow. Second operand 15 states and 142 transitions. [2024-11-27 23:20:32,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 145 transitions, 1394 flow [2024-11-27 23:20:32,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 145 transitions, 1306 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-11-27 23:20:32,990 INFO L231 Difference]: Finished difference. Result has 96 places, 118 transitions, 1115 flow [2024-11-27 23:20:32,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1115, PETRI_PLACES=96, PETRI_TRANSITIONS=118} [2024-11-27 23:20:32,991 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-11-27 23:20:32,992 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 118 transitions, 1115 flow [2024-11-27 23:20:32,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:32,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:20:32,993 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, 1, 1] [2024-11-27 23:20:33,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 23:20:33,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 23:20:33,197 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:20:33,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1846154624, now seen corresponding path program 5 times [2024-11-27 23:20:33,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:33,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970709592] [2024-11-27 23:20:33,198 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:20:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:33,258 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:20:33,259 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:20:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970709592] [2024-11-27 23:20:35,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970709592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189996378] [2024-11-27 23:20:35,312 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:20:35,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:35,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:35,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:35,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:20:35,513 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:20:35,513 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:35,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-27 23:20:35,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:37,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:20:37,901 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 28 treesize of output 20 [2024-11-27 23:20:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:20:37,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:38,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:20:38,210 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 20 treesize of output 17 [2024-11-27 23:20:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:20:38,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189996378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:20:38,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:20:38,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 20 [2024-11-27 23:20:38,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527527987] [2024-11-27 23:20:38,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:38,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:20:38,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:38,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:20:38,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:20:38,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:20:38,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 118 transitions, 1115 flow. Second operand has 21 states, 21 states have (on average 6.619047619047619) internal successors, (139), 21 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:38,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:20:38,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:20:38,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:20:42,806 INFO L124 PetriNetUnfolderBase]: 1093/1586 cut-off events. [2024-11-27 23:20:42,807 INFO L125 PetriNetUnfolderBase]: For 6776/6776 co-relation queries the response was YES. [2024-11-27 23:20:42,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7693 conditions, 1586 events. 1093/1586 cut-off events. For 6776/6776 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6023 event pairs, 83 based on Foata normal form. 1/1587 useless extension candidates. Maximal degree in co-relation 7628. Up to 1166 conditions per place. [2024-11-27 23:20:42,832 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 91 selfloop transitions, 78 changer transitions 1/171 dead transitions. [2024-11-27 23:20:42,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 171 transitions, 1726 flow [2024-11-27 23:20:42,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:20:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:20:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 152 transitions. [2024-11-27 23:20:42,838 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3771712158808933 [2024-11-27 23:20:42,839 INFO L175 Difference]: Start difference. First operand has 96 places, 118 transitions, 1115 flow. Second operand 13 states and 152 transitions. [2024-11-27 23:20:42,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 171 transitions, 1726 flow [2024-11-27 23:20:42,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 171 transitions, 1642 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-11-27 23:20:42,883 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1351 flow [2024-11-27 23:20:42,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1351, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-11-27 23:20:42,888 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-11-27 23:20:42,889 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1351 flow [2024-11-27 23:20:42,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.619047619047619) internal successors, (139), 21 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:42,889 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:20:42,890 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, 1, 1] [2024-11-27 23:20:42,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 23:20:43,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:43,091 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:20:43,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1210976920, now seen corresponding path program 6 times [2024-11-27 23:20:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:43,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290346988] [2024-11-27 23:20:43,092 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:20:43,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:43,154 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:20:43,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:20:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:46,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290346988] [2024-11-27 23:20:46,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290346988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:46,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878620310] [2024-11-27 23:20:46,102 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:20:46,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:46,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:46,106 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:46,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:20:46,291 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:20:46,291 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:46,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-27 23:20:46,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:48,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:20:48,637 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 28 treesize of output 20 [2024-11-27 23:20:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:20:48,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:49,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:20:49,461 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 20 treesize of output 17 [2024-11-27 23:20:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:20:49,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878620310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:20:49,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:20:49,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 27 [2024-11-27 23:20:49,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233689687] [2024-11-27 23:20:49,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:49,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:20:49,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:49,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:20:49,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:20:49,714 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:20:49,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1351 flow. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:49,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:20:49,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:20:49,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:20:53,356 INFO L124 PetriNetUnfolderBase]: 1168/1695 cut-off events. [2024-11-27 23:20:53,356 INFO L125 PetriNetUnfolderBase]: For 8371/8371 co-relation queries the response was YES. [2024-11-27 23:20:53,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8718 conditions, 1695 events. 1168/1695 cut-off events. For 8371/8371 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6489 event pairs, 141 based on Foata normal form. 1/1696 useless extension candidates. Maximal degree in co-relation 8650. Up to 1390 conditions per place. [2024-11-27 23:20:53,374 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 102 selfloop transitions, 72 changer transitions 1/176 dead transitions. [2024-11-27 23:20:53,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 176 transitions, 1983 flow [2024-11-27 23:20:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:20:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:20:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-11-27 23:20:53,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3598014888337469 [2024-11-27 23:20:53,376 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1351 flow. Second operand 13 states and 145 transitions. [2024-11-27 23:20:53,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 176 transitions, 1983 flow [2024-11-27 23:20:53,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 176 transitions, 1787 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-11-27 23:20:53,431 INFO L231 Difference]: Finished difference. Result has 112 places, 140 transitions, 1537 flow [2024-11-27 23:20:53,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1537, PETRI_PLACES=112, PETRI_TRANSITIONS=140} [2024-11-27 23:20:53,432 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 81 predicate places. [2024-11-27 23:20:53,432 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 140 transitions, 1537 flow [2024-11-27 23:20:53,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:53,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:20:53,433 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, 1, 1] [2024-11-27 23:20:53,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 23:20:53,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:20:53,633 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:20:53,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:53,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2038936784, now seen corresponding path program 7 times [2024-11-27 23:20:53,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:53,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301718535] [2024-11-27 23:20:53,634 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:20:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:20:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:20:55,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:55,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301718535] [2024-11-27 23:20:55,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301718535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:55,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003461600] [2024-11-27 23:20:55,380 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:20:55,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:55,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:55,382 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:55,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:20:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:20:55,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:20:55,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:56,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:20:56,288 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 28 treesize of output 24 [2024-11-27 23:20:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:20:56,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:21:36,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:21:36,868 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 20 treesize of output 17 [2024-11-27 23:21:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:21:37,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003461600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:21:37,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:21:37,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-11-27 23:21:37,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6446376] [2024-11-27 23:21:37,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:21:37,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 23:21:37,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:21:37,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 23:21:37,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=460, Unknown=10, NotChecked=0, Total=552 [2024-11-27 23:21:37,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:21:37,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 140 transitions, 1537 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:21:37,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:21:37,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:21:37,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:21:41,173 INFO L124 PetriNetUnfolderBase]: 1218/1768 cut-off events. [2024-11-27 23:21:41,173 INFO L125 PetriNetUnfolderBase]: For 9154/9154 co-relation queries the response was YES. [2024-11-27 23:21:41,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9249 conditions, 1768 events. 1218/1768 cut-off events. For 9154/9154 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6855 event pairs, 147 based on Foata normal form. 1/1769 useless extension candidates. Maximal degree in co-relation 9176. Up to 1463 conditions per place. [2024-11-27 23:21:41,194 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 107 selfloop transitions, 74 changer transitions 1/183 dead transitions. [2024-11-27 23:21:41,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 183 transitions, 2094 flow [2024-11-27 23:21:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:21:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:21:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-11-27 23:21:41,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36476426799007444 [2024-11-27 23:21:41,197 INFO L175 Difference]: Start difference. First operand has 112 places, 140 transitions, 1537 flow. Second operand 13 states and 147 transitions. [2024-11-27 23:21:41,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 183 transitions, 2094 flow [2024-11-27 23:21:41,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 183 transitions, 1916 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-11-27 23:21:41,241 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1607 flow [2024-11-27 23:21:41,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1607, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-11-27 23:21:41,242 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-11-27 23:21:41,242 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1607 flow [2024-11-27 23:21:41,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:21:41,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:21:41,243 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, 1, 1] [2024-11-27 23:21:41,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:21:41,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:21:41,444 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:21:41,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:21:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1089525220, now seen corresponding path program 8 times [2024-11-27 23:21:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:21:41,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911407199] [2024-11-27 23:21:41,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:21:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:21:41,499 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:21:41,499 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:21:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:21:43,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:21:43,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911407199] [2024-11-27 23:21:43,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911407199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:21:43,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818216872] [2024-11-27 23:21:43,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:21:43,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:21:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:21:43,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:21:43,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:21:44,117 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:21:44,118 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:21:44,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-27 23:21:44,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:21:44,337 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 [2024-11-27 23:21:44,582 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:21:44,583 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 [2024-11-27 23:21:45,943 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-11-27 23:21:45,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-11-27 23:21:46,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:21:46,800 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 76 treesize of output 96 [2024-11-27 23:21:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:21:46,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:21:51,257 WARN L851 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int)) (let ((.cse0 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse1 (select (select |c_#memory_int#1| c_~B~0.base) (+ .cse0 c_~B~0.offset))) (.cse2 (select (select |c_#memory_int#1| c_~A~0.base) (+ .cse0 c_~A~0.offset)))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) (+ .cse0 ~C~0.offset) (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 c_~csum~0 .cse2))))) is different from false [2024-11-27 23:21:51,542 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:21:51,542 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 40 [2024-11-27 23:21:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2024-11-27 23:21:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818216872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:21:52,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:21:52,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 32 [2024-11-27 23:21:52,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598252141] [2024-11-27 23:21:52,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:21:52,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-27 23:21:52,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:21:52,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-27 23:21:52,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=850, Unknown=1, NotChecked=60, Total=1056 [2024-11-27 23:21:52,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:21:52,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1607 flow. Second operand has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:21:52,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:21:52,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:21:52,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:21:55,553 INFO L124 PetriNetUnfolderBase]: 1340/1943 cut-off events. [2024-11-27 23:21:55,553 INFO L125 PetriNetUnfolderBase]: For 11526/11526 co-relation queries the response was YES. [2024-11-27 23:21:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10162 conditions, 1943 events. 1340/1943 cut-off events. For 11526/11526 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7731 event pairs, 145 based on Foata normal form. 1/1944 useless extension candidates. Maximal degree in co-relation 10087. Up to 1570 conditions per place. [2024-11-27 23:21:55,576 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 111 selfloop transitions, 78 changer transitions 1/191 dead transitions. [2024-11-27 23:21:55,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 191 transitions, 2256 flow [2024-11-27 23:21:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:21:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 23:21:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2024-11-27 23:21:55,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3311827956989247 [2024-11-27 23:21:55,578 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1607 flow. Second operand 15 states and 154 transitions. [2024-11-27 23:21:55,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 191 transitions, 2256 flow [2024-11-27 23:21:55,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 191 transitions, 2048 flow, removed 30 selfloop flow, removed 12 redundant places. [2024-11-27 23:21:55,638 INFO L231 Difference]: Finished difference. Result has 123 places, 155 transitions, 1741 flow [2024-11-27 23:21:55,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1741, PETRI_PLACES=123, PETRI_TRANSITIONS=155} [2024-11-27 23:21:55,639 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-11-27 23:21:55,640 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 155 transitions, 1741 flow [2024-11-27 23:21:55,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:21:55,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:21:55,640 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, 1, 1] [2024-11-27 23:21:55,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:21:55,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 23:21:55,841 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:21:55,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:21:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2037109212, now seen corresponding path program 9 times [2024-11-27 23:21:55,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:21:55,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079525525] [2024-11-27 23:21:55,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:21:55,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:21:55,910 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:21:55,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:21:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:21:58,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:21:58,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079525525] [2024-11-27 23:21:58,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079525525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:21:58,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980196717] [2024-11-27 23:21:58,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:21:58,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:21:58,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:21:58,445 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:21:58,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:21:58,590 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:21:58,590 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:21:58,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-27 23:21:58,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:21:58,749 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 [2024-11-27 23:21:58,983 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:21:58,983 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 [2024-11-27 23:22:00,304 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-11-27 23:22:00,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-11-27 23:22:00,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:22:00,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2024-11-27 23:22:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:22:00,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:17,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:22:17,887 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 40 [2024-11-27 23:22:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:22:18,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980196717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:18,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:18,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 32 [2024-11-27 23:22:18,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361083728] [2024-11-27 23:22:18,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:18,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-27 23:22:18,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:18,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-27 23:22:18,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2024-11-27 23:22:18,621 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:22:18,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 155 transitions, 1741 flow. Second operand has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:18,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:18,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:22:18,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:23,279 INFO L124 PetriNetUnfolderBase]: 1414/2050 cut-off events. [2024-11-27 23:22:23,279 INFO L125 PetriNetUnfolderBase]: For 12929/12929 co-relation queries the response was YES. [2024-11-27 23:22:23,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10872 conditions, 2050 events. 1414/2050 cut-off events. For 12929/12929 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8260 event pairs, 188 based on Foata normal form. 1/2051 useless extension candidates. Maximal degree in co-relation 10797. Up to 1747 conditions per place. [2024-11-27 23:22:23,297 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 122 selfloop transitions, 72 changer transitions 1/196 dead transitions. [2024-11-27 23:22:23,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 196 transitions, 2357 flow [2024-11-27 23:22:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:22:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 23:22:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-11-27 23:22:23,300 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32688172043010755 [2024-11-27 23:22:23,300 INFO L175 Difference]: Start difference. First operand has 123 places, 155 transitions, 1741 flow. Second operand 15 states and 152 transitions. [2024-11-27 23:22:23,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 196 transitions, 2357 flow [2024-11-27 23:22:23,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 196 transitions, 2125 flow, removed 74 selfloop flow, removed 10 redundant places. [2024-11-27 23:22:23,380 INFO L231 Difference]: Finished difference. Result has 129 places, 161 transitions, 1796 flow [2024-11-27 23:22:23,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1796, PETRI_PLACES=129, PETRI_TRANSITIONS=161} [2024-11-27 23:22:23,381 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-11-27 23:22:23,382 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 161 transitions, 1796 flow [2024-11-27 23:22:23,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:23,382 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:23,382 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, 1, 1] [2024-11-27 23:22:23,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:22:23,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:22:23,583 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:22:23,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1148801088, now seen corresponding path program 10 times [2024-11-27 23:22:23,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:23,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356636462] [2024-11-27 23:22:23,585 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:22:23,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:23,631 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:22:23,632 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:25,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:25,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356636462] [2024-11-27 23:22:25,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356636462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:25,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426621715] [2024-11-27 23:22:25,443 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:22:25,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:25,445 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:25,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:22:25,590 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:22:25,590 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:25,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:22:25,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:26,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:22:26,703 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 28 treesize of output 24 [2024-11-27 23:22:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:22:26,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:47,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:22:47,432 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 34 treesize of output 87 [2024-11-27 23:22:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:22:48,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426621715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:48,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:48,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 24 [2024-11-27 23:22:48,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078564381] [2024-11-27 23:22:48,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:48,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 23:22:48,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:48,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 23:22:48,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=513, Unknown=2, NotChecked=0, Total=600 [2024-11-27 23:22:48,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:22:48,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 161 transitions, 1796 flow. Second operand has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:48,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:48,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:22:48,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:22:52,858 INFO L124 PetriNetUnfolderBase]: 1630/2362 cut-off events. [2024-11-27 23:22:52,858 INFO L125 PetriNetUnfolderBase]: For 16820/16820 co-relation queries the response was YES. [2024-11-27 23:22:52,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12965 conditions, 2362 events. 1630/2362 cut-off events. For 16820/16820 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9799 event pairs, 414 based on Foata normal form. 1/2363 useless extension candidates. Maximal degree in co-relation 12887. Up to 2060 conditions per place. [2024-11-27 23:22:52,879 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 156 selfloop transitions, 71 changer transitions 1/229 dead transitions. [2024-11-27 23:22:52,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 229 transitions, 2907 flow [2024-11-27 23:22:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:22:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:22:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-11-27 23:22:52,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3598014888337469 [2024-11-27 23:22:52,883 INFO L175 Difference]: Start difference. First operand has 129 places, 161 transitions, 1796 flow. Second operand 13 states and 145 transitions. [2024-11-27 23:22:52,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 229 transitions, 2907 flow [2024-11-27 23:22:52,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 229 transitions, 2667 flow, removed 30 selfloop flow, removed 12 redundant places. [2024-11-27 23:22:52,949 INFO L231 Difference]: Finished difference. Result has 133 places, 192 transitions, 2320 flow [2024-11-27 23:22:52,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2320, PETRI_PLACES=133, PETRI_TRANSITIONS=192} [2024-11-27 23:22:52,950 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2024-11-27 23:22:52,950 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 192 transitions, 2320 flow [2024-11-27 23:22:52,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:52,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:22:52,951 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, 1, 1] [2024-11-27 23:22:52,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 23:22:53,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 23:22:53,153 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:22:53,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:53,154 INFO L85 PathProgramCache]: Analyzing trace with hash 108241540, now seen corresponding path program 11 times [2024-11-27 23:22:53,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:53,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753087994] [2024-11-27 23:22:53,155 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:22:53,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:53,191 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:53,191 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:54,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:54,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753087994] [2024-11-27 23:22:54,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753087994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:54,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693138808] [2024-11-27 23:22:54,887 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:22:54,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:54,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:54,890 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:54,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:22:55,045 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:22:55,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:22:55,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-27 23:22:55,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:56,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:22:56,835 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 28 treesize of output 20 [2024-11-27 23:22:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:22:56,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:57,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:22:57,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2024-11-27 23:22:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:22:58,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693138808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:22:58,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:22:58,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 23 [2024-11-27 23:22:58,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735822958] [2024-11-27 23:22:58,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:58,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 23:22:58,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:58,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 23:22:58,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-11-27 23:22:58,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:22:58,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 192 transitions, 2320 flow. Second operand has 24 states, 24 states have (on average 6.625) internal successors, (159), 24 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:58,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:22:58,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:22:58,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:03,062 INFO L124 PetriNetUnfolderBase]: 1799/2607 cut-off events. [2024-11-27 23:23:03,062 INFO L125 PetriNetUnfolderBase]: For 22603/22603 co-relation queries the response was YES. [2024-11-27 23:23:03,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14755 conditions, 2607 events. 1799/2607 cut-off events. For 22603/22603 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11096 event pairs, 459 based on Foata normal form. 1/2608 useless extension candidates. Maximal degree in co-relation 14673. Up to 2356 conditions per place. [2024-11-27 23:23:03,086 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 183 selfloop transitions, 59 changer transitions 1/244 dead transitions. [2024-11-27 23:23:03,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 244 transitions, 3218 flow [2024-11-27 23:23:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:23:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 23:23:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2024-11-27 23:23:03,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3311827956989247 [2024-11-27 23:23:03,088 INFO L175 Difference]: Start difference. First operand has 133 places, 192 transitions, 2320 flow. Second operand 15 states and 154 transitions. [2024-11-27 23:23:03,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 244 transitions, 3218 flow [2024-11-27 23:23:03,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 244 transitions, 3021 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-11-27 23:23:03,185 INFO L231 Difference]: Finished difference. Result has 146 places, 206 transitions, 2572 flow [2024-11-27 23:23:03,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2572, PETRI_PLACES=146, PETRI_TRANSITIONS=206} [2024-11-27 23:23:03,186 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 115 predicate places. [2024-11-27 23:23:03,186 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 206 transitions, 2572 flow [2024-11-27 23:23:03,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.625) internal successors, (159), 24 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:03,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:03,186 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, 1, 1] [2024-11-27 23:23:03,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 23:23:03,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:23:03,387 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:23:03,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1074932402, now seen corresponding path program 12 times [2024-11-27 23:23:03,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:03,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841535148] [2024-11-27 23:23:03,388 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:23:03,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:03,451 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:23:03,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:06,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:06,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841535148] [2024-11-27 23:23:06,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841535148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:06,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496190929] [2024-11-27 23:23:06,219 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:23:06,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:06,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:06,222 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:06,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:23:06,352 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:23:06,352 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:06,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-27 23:23:06,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:07,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:23:07,957 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 28 treesize of output 20 [2024-11-27 23:23:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:23:08,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:08,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:23:08,606 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 34 treesize of output 87 [2024-11-27 23:23:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:23:09,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496190929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:09,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:09,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 27 [2024-11-27 23:23:09,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632481138] [2024-11-27 23:23:09,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:09,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:23:09,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:09,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:23:09,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:23:09,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:23:09,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 206 transitions, 2572 flow. Second operand has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:09,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:09,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:23:09,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:13,469 INFO L124 PetriNetUnfolderBase]: 1884/2730 cut-off events. [2024-11-27 23:23:13,469 INFO L125 PetriNetUnfolderBase]: For 23367/23367 co-relation queries the response was YES. [2024-11-27 23:23:13,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15438 conditions, 2730 events. 1884/2730 cut-off events. For 23367/23367 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11724 event pairs, 510 based on Foata normal form. 1/2731 useless extension candidates. Maximal degree in co-relation 15351. Up to 2542 conditions per place. [2024-11-27 23:23:13,486 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 187 selfloop transitions, 59 changer transitions 1/248 dead transitions. [2024-11-27 23:23:13,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 248 transitions, 3393 flow [2024-11-27 23:23:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:23:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 23:23:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 148 transitions. [2024-11-27 23:23:13,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31827956989247314 [2024-11-27 23:23:13,488 INFO L175 Difference]: Start difference. First operand has 146 places, 206 transitions, 2572 flow. Second operand 15 states and 148 transitions. [2024-11-27 23:23:13,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 248 transitions, 3393 flow [2024-11-27 23:23:13,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 248 transitions, 3069 flow, removed 150 selfloop flow, removed 7 redundant places. [2024-11-27 23:23:13,564 INFO L231 Difference]: Finished difference. Result has 156 places, 216 transitions, 2623 flow [2024-11-27 23:23:13,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2623, PETRI_PLACES=156, PETRI_TRANSITIONS=216} [2024-11-27 23:23:13,565 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 125 predicate places. [2024-11-27 23:23:13,565 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 216 transitions, 2623 flow [2024-11-27 23:23:13,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:13,566 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:13,566 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, 1, 1] [2024-11-27 23:23:13,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:13,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:13,767 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:23:13,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1086725574, now seen corresponding path program 13 times [2024-11-27 23:23:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006030646] [2024-11-27 23:23:13,768 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:23:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:15,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006030646] [2024-11-27 23:23:15,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006030646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817069229] [2024-11-27 23:23:15,907 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:23:15,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:15,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:15,909 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:15,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:23:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:16,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:23:16,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:17,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:23:17,389 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 28 treesize of output 24 [2024-11-27 23:23:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:23:17,431 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:42,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:23:42,188 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 34 treesize of output 87 [2024-11-27 23:23:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:23:43,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817069229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:43,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:43,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 24 [2024-11-27 23:23:43,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161472489] [2024-11-27 23:23:43,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:43,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 23:23:43,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:43,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 23:23:43,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=510, Unknown=4, NotChecked=0, Total=600 [2024-11-27 23:23:43,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-11-27 23:23:43,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 216 transitions, 2623 flow. Second operand has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:43,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:23:43,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-11-27 23:23:43,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:23:47,188 INFO L124 PetriNetUnfolderBase]: 2025/2935 cut-off events. [2024-11-27 23:23:47,189 INFO L125 PetriNetUnfolderBase]: For 27201/27201 co-relation queries the response was YES. [2024-11-27 23:23:47,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16342 conditions, 2935 events. 2025/2935 cut-off events. For 27201/27201 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12836 event pairs, 554 based on Foata normal form. 1/2936 useless extension candidates. Maximal degree in co-relation 16251. Up to 2659 conditions per place. [2024-11-27 23:23:47,273 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 203 selfloop transitions, 67 changer transitions 1/272 dead transitions. [2024-11-27 23:23:47,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 272 transitions, 3653 flow [2024-11-27 23:23:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:23:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:23:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-11-27 23:23:47,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36476426799007444 [2024-11-27 23:23:47,274 INFO L175 Difference]: Start difference. First operand has 156 places, 216 transitions, 2623 flow. Second operand 13 states and 147 transitions. [2024-11-27 23:23:47,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 272 transitions, 3653 flow [2024-11-27 23:23:47,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 272 transitions, 3457 flow, removed 44 selfloop flow, removed 11 redundant places. [2024-11-27 23:23:47,346 INFO L231 Difference]: Finished difference. Result has 160 places, 233 transitions, 2972 flow [2024-11-27 23:23:47,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2972, PETRI_PLACES=160, PETRI_TRANSITIONS=233} [2024-11-27 23:23:47,347 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2024-11-27 23:23:47,347 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 233 transitions, 2972 flow [2024-11-27 23:23:47,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:47,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:23:47,348 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, 1, 1] [2024-11-27 23:23:47,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:47,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:47,549 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 23:23:47,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1981414906, now seen corresponding path program 14 times [2024-11-27 23:23:47,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:47,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119856165] [2024-11-27 23:23:47,550 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:47,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:47,624 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:47,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119856165] [2024-11-27 23:23:50,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119856165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675700817] [2024-11-27 23:23:50,441 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:50,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:50,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:50,442 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:50,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00c31764-fd63-455d-8fe6-c2fedab6096a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:23:50,581 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:50,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:50,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-27 23:23:50,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:50,615 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 [2024-11-27 23:23:50,808 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-27 23:23:50,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-27 23:23:50,988 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:23:50,988 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 [2024-11-27 23:23:52,375 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-11-27 23:23:52,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-11-27 23:23:52,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:23:52,880 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 76 treesize of output 96 [2024-11-27 23:23:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:23:53,127 INFO L312 TraceCheckSpWp]: Computing backward predicates...