./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-5.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_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/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_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/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_5f16782c-77d3-4564-afb2-0e4a46a03381/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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:26:03,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:26:03,852 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:26:03,860 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:26:03,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:26:03,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:26:03,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:26:03,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:26:03,895 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:26:03,895 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:26:03,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:26:03,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:26:03,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:26:03,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:26:03,896 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:26:03,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:26:03,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:26:03,896 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:26:03,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:26:03,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:26:03,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:26:03,897 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:26:03,897 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:26:03,897 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:26:03,897 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:26:03,897 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:26:03,898 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:26:03,898 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:26:03,899 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:26:03,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:26:03,899 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:26:03,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:26:03,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:26:03,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:26:03,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:26:03,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:26:03,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:26:03,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:26:03,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:26:03,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:26:03,901 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:26:03,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:26:03,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:26:03,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:26:03,902 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:26:03,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:26:03,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:26:03,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:26:03,902 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_5f16782c-77d3-4564-afb2-0e4a46a03381/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 -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2024-11-28 04:26:04,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:26:04,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:26:04,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:26:04,328 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:26:04,328 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:26:04,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-5.wvr.c [2024-11-28 04:26:07,781 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data/3fbbe4b60/668035446171453f94d3c3798a0d8be6/FLAGa9b65f631 [2024-11-28 04:26:08,147 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:26:08,148 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/sv-benchmarks/c/weaver/unroll-5.wvr.c [2024-11-28 04:26:08,179 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data/3fbbe4b60/668035446171453f94d3c3798a0d8be6/FLAGa9b65f631 [2024-11-28 04:26:08,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data/3fbbe4b60/668035446171453f94d3c3798a0d8be6 [2024-11-28 04:26:08,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:26:08,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:26:08,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:26:08,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:26:08,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:26:08,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3967950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08, skipping insertion in model container [2024-11-28 04:26:08,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:26:08,611 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_5f16782c-77d3-4564-afb2-0e4a46a03381/sv-benchmarks/c/weaver/unroll-5.wvr.c[2670,2683] [2024-11-28 04:26:08,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:26:08,650 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:26:08,679 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_5f16782c-77d3-4564-afb2-0e4a46a03381/sv-benchmarks/c/weaver/unroll-5.wvr.c[2670,2683] [2024-11-28 04:26:08,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:26:08,704 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:26:08,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08 WrapperNode [2024-11-28 04:26:08,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:26:08,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:26:08,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:26:08,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:26:08,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,738 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,790 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 154 [2024-11-28 04:26:08,790 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:26:08,791 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:26:08,791 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:26:08,791 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:26:08,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,810 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,842 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 04:26:08,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,863 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,864 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,870 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,872 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,883 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:26:08,884 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:26:08,884 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:26:08,885 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:26:08,887 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (1/1) ... [2024-11-28 04:26:08,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:26:08,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:08,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:26:08,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:26:08,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:26:08,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:26:08,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:26:08,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:26:08,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:26:08,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:26:08,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:26:08,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:26:08,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:26:08,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:26:08,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:26:08,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:26:08,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:26:08,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:26:08,998 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:26:09,177 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:26:09,179 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:26:09,778 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:26:09,780 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:26:10,286 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:26:10,286 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:26:10,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:26:10 BoogieIcfgContainer [2024-11-28 04:26:10,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:26:10,290 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:26:10,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:26:10,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:26:10,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:26:08" (1/3) ... [2024-11-28 04:26:10,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4936b813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:26:10, skipping insertion in model container [2024-11-28 04:26:10,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:26:08" (2/3) ... [2024-11-28 04:26:10,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4936b813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:26:10, skipping insertion in model container [2024-11-28 04:26:10,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:26:10" (3/3) ... [2024-11-28 04:26:10,300 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2024-11-28 04:26:10,326 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:26:10,328 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-5.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 04:26:10,329 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:26:10,418 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 04:26:10,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 04:26:10,524 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-28 04:26:10,527 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:26:10,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-28 04:26:10,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 04:26:10,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-28 04:26:10,557 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:26:10,571 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;@67a188df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:26:10,572 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 04:26:10,583 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:26:10,583 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-28 04:26:10,583 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:26:10,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:10,584 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:10,585 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:10,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:10,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1414547002, now seen corresponding path program 1 times [2024-11-28 04:26:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:10,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34751048] [2024-11-28 04:26:10,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:26:10,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:26:11,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:11,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34751048] [2024-11-28 04:26:11,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34751048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:26:11,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:26:11,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:26:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595962730] [2024-11-28 04:26:11,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:26:11,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:26:11,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:11,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:26:11,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:26:11,234 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:11,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:11,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:11,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:11,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:11,445 INFO L124 PetriNetUnfolderBase]: 69/125 cut-off events. [2024-11-28 04:26:11,446 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-28 04:26:11,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 125 events. 69/125 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 329 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2024-11-28 04:26:11,452 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-11-28 04:26:11,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2024-11-28 04:26:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:26:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:26:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-11-28 04:26:11,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-28 04:26:11,478 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 37 transitions. [2024-11-28 04:26:11,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2024-11-28 04:26:11,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 04:26:11,494 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-11-28 04:26:11,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-11-28 04:26:11,503 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-28 04:26:11,503 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-11-28 04:26:11,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:11,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:11,503 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:11,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:26:11,507 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:11,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash 905080847, now seen corresponding path program 1 times [2024-11-28 04:26:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:11,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58915675] [2024-11-28 04:26:11,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:26:11,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:11,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:11,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58915675] [2024-11-28 04:26:11,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58915675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:26:11,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:26:11,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:26:11,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574186532] [2024-11-28 04:26:11,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:26:11,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:26:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:11,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:26:11,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:26:11,864 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:11,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:11,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:11,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:11,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:12,007 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2024-11-28 04:26:12,008 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-28 04:26:12,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 126 events. 69/126 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 303 event pairs, 44 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 125 conditions per place. [2024-11-28 04:26:12,013 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2024-11-28 04:26:12,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 97 flow [2024-11-28 04:26:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:26:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:26:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-28 04:26:12,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-28 04:26:12,015 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 27 transitions. [2024-11-28 04:26:12,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 97 flow [2024-11-28 04:26:12,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:26:12,017 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2024-11-28 04:26:12,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2024-11-28 04:26:12,018 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2024-11-28 04:26:12,019 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2024-11-28 04:26:12,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:12,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:12,020 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:12,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:26:12,020 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:12,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1403428757, now seen corresponding path program 1 times [2024-11-28 04:26:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:12,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664535298] [2024-11-28 04:26:12,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:26:12,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:12,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664535298] [2024-11-28 04:26:12,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664535298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699977363] [2024-11-28 04:26:12,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:26:12,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:12,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:12,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:12,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:26:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:12,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:26:12,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:12,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:12,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699977363] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:12,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:26:12,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-11-28 04:26:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095394491] [2024-11-28 04:26:12,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:26:12,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:26:12,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:12,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:26:12,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:26:12,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:12,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:12,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:12,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:12,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:12,839 INFO L124 PetriNetUnfolderBase]: 76/138 cut-off events. [2024-11-28 04:26:12,839 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-28 04:26:12,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 138 events. 76/138 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 372 event pairs, 22 based on Foata normal form. 5/142 useless extension candidates. Maximal degree in co-relation 317. Up to 71 conditions per place. [2024-11-28 04:26:12,842 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2024-11-28 04:26:12,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 34 transitions, 168 flow [2024-11-28 04:26:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:26:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:26:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-11-28 04:26:12,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-28 04:26:12,844 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 45 transitions. [2024-11-28 04:26:12,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 34 transitions, 168 flow [2024-11-28 04:26:12,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 04:26:12,847 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2024-11-28 04:26:12,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-11-28 04:26:12,848 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-11-28 04:26:12,848 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2024-11-28 04:26:12,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:12,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:12,849 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:12,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:26:13,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:13,053 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:13,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:13,054 INFO L85 PathProgramCache]: Analyzing trace with hash 403687211, now seen corresponding path program 1 times [2024-11-28 04:26:13,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:13,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61945187] [2024-11-28 04:26:13,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:26:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:13,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61945187] [2024-11-28 04:26:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61945187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:26:13,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:26:13,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:26:13,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405818406] [2024-11-28 04:26:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:26:13,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:26:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:13,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:26:13,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:26:13,441 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:13,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:13,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:13,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:13,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:13,711 INFO L124 PetriNetUnfolderBase]: 85/167 cut-off events. [2024-11-28 04:26:13,712 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-11-28 04:26:13,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 167 events. 85/167 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 558 event pairs, 24 based on Foata normal form. 9/175 useless extension candidates. Maximal degree in co-relation 442. Up to 93 conditions per place. [2024-11-28 04:26:13,716 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 4 changer transitions 7/43 dead transitions. [2024-11-28 04:26:13,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 243 flow [2024-11-28 04:26:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:26:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:26:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-11-28 04:26:13,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-11-28 04:26:13,718 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 5 states and 53 transitions. [2024-11-28 04:26:13,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 243 flow [2024-11-28 04:26:13,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 238 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 04:26:13,727 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 115 flow [2024-11-28 04:26:13,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2024-11-28 04:26:13,728 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-11-28 04:26:13,729 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 115 flow [2024-11-28 04:26:13,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:13,729 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:13,729 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:13,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:26:13,729 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:13,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1793554779, now seen corresponding path program 2 times [2024-11-28 04:26:13,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:13,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386649739] [2024-11-28 04:26:13,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:26:13,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:13,795 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:26:13,795 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:14,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386649739] [2024-11-28 04:26:14,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386649739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:14,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306633681] [2024-11-28 04:26:14,005 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:26:14,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:14,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:14,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:26:14,124 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:26:14,124 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:14,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:26:14,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:14,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:14,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306633681] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:14,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:26:14,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-11-28 04:26:14,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248788212] [2024-11-28 04:26:14,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:26:14,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:26:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:14,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:26:14,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:26:14,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:14,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:14,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:14,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:14,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:14,507 INFO L124 PetriNetUnfolderBase]: 87/166 cut-off events. [2024-11-28 04:26:14,507 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-11-28 04:26:14,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 166 events. 87/166 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 494 event pairs, 25 based on Foata normal form. 4/169 useless extension candidates. Maximal degree in co-relation 550. Up to 103 conditions per place. [2024-11-28 04:26:14,510 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 3/36 dead transitions. [2024-11-28 04:26:14,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 234 flow [2024-11-28 04:26:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:26:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:26:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-28 04:26:14,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-28 04:26:14,512 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 115 flow. Second operand 4 states and 44 transitions. [2024-11-28 04:26:14,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 234 flow [2024-11-28 04:26:14,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 221 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-28 04:26:14,516 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 134 flow [2024-11-28 04:26:14,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2024-11-28 04:26:14,517 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2024-11-28 04:26:14,517 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 134 flow [2024-11-28 04:26:14,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:14,517 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:14,517 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:14,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:26:14,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:14,718 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:14,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2066255829, now seen corresponding path program 2 times [2024-11-28 04:26:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441251017] [2024-11-28 04:26:14,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:26:14,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:14,751 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:26:14,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:15,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:15,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441251017] [2024-11-28 04:26:15,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441251017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123142681] [2024-11-28 04:26:15,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:26:15,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:15,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:15,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:15,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:26:15,313 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:26:15,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:15,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:26:15,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:15,452 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:26:15,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123142681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:26:15,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:26:15,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2024-11-28 04:26:15,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445742633] [2024-11-28 04:26:15,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:26:15,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:26:15,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:15,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:26:15,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:26:15,454 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:15,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:15,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:15,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:15,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:16,291 INFO L124 PetriNetUnfolderBase]: 96/186 cut-off events. [2024-11-28 04:26:16,291 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2024-11-28 04:26:16,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 186 events. 96/186 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 614 event pairs, 24 based on Foata normal form. 2/187 useless extension candidates. Maximal degree in co-relation 637. Up to 99 conditions per place. [2024-11-28 04:26:16,294 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 9 changer transitions 9/50 dead transitions. [2024-11-28 04:26:16,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 343 flow [2024-11-28 04:26:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:26:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:26:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-28 04:26:16,296 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 04:26:16,296 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 134 flow. Second operand 6 states and 60 transitions. [2024-11-28 04:26:16,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 343 flow [2024-11-28 04:26:16,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:26:16,303 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 191 flow [2024-11-28 04:26:16,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2024-11-28 04:26:16,305 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2024-11-28 04:26:16,305 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 191 flow [2024-11-28 04:26:16,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:16,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:16,307 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:16,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:26:16,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:26:16,508 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:16,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash -226110265, now seen corresponding path program 3 times [2024-11-28 04:26:16,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:16,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461698525] [2024-11-28 04:26:16,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:26:16,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:16,551 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:26:16,551 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:16,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:16,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461698525] [2024-11-28 04:26:16,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461698525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:16,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460333717] [2024-11-28 04:26:16,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:26:16,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:16,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:16,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:16,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:26:17,008 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:26:17,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:17,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:26:17,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:17,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:17,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460333717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:26:17,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:26:17,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-28 04:26:17,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638971112] [2024-11-28 04:26:17,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:26:17,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:26:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:17,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:26:17,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:26:17,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:17,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 191 flow. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:17,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:17,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:17,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:17,402 INFO L124 PetriNetUnfolderBase]: 106/205 cut-off events. [2024-11-28 04:26:17,402 INFO L125 PetriNetUnfolderBase]: For 431/431 co-relation queries the response was YES. [2024-11-28 04:26:17,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 205 events. 106/205 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 654 event pairs, 35 based on Foata normal form. 5/209 useless extension candidates. Maximal degree in co-relation 808. Up to 129 conditions per place. [2024-11-28 04:26:17,406 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 14 changer transitions 3/50 dead transitions. [2024-11-28 04:26:17,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 403 flow [2024-11-28 04:26:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:26:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:26:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 56 transitions. [2024-11-28 04:26:17,409 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-28 04:26:17,409 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 191 flow. Second operand 6 states and 56 transitions. [2024-11-28 04:26:17,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 403 flow [2024-11-28 04:26:17,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-28 04:26:17,416 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 277 flow [2024-11-28 04:26:17,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2024-11-28 04:26:17,418 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-11-28 04:26:17,418 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 277 flow [2024-11-28 04:26:17,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:17,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:17,420 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:17,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:26:17,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:17,621 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:17,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:17,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1148275955, now seen corresponding path program 3 times [2024-11-28 04:26:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:17,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573894083] [2024-11-28 04:26:17,622 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:26:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:17,641 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:26:17,642 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573894083] [2024-11-28 04:26:17,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573894083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993616311] [2024-11-28 04:26:17,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:26:17,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:17,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:17,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:26:17,867 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:26:17,867 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:17,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:26:17,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:17,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:17,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993616311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:26:17,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:26:17,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-28 04:26:17,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492388421] [2024-11-28 04:26:17,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:26:17,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:26:17,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:17,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:26:17,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:26:17,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:17,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 277 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 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) [2024-11-28 04:26:17,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:17,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:17,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:18,137 INFO L124 PetriNetUnfolderBase]: 107/201 cut-off events. [2024-11-28 04:26:18,137 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2024-11-28 04:26:18,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 201 events. 107/201 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 635 event pairs, 31 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 896. Up to 136 conditions per place. [2024-11-28 04:26:18,140 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 30 selfloop transitions, 13 changer transitions 3/47 dead transitions. [2024-11-28 04:26:18,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 431 flow [2024-11-28 04:26:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:26:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:26:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2024-11-28 04:26:18,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-28 04:26:18,142 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 277 flow. Second operand 5 states and 49 transitions. [2024-11-28 04:26:18,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 431 flow [2024-11-28 04:26:18,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 410 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-28 04:26:18,148 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 304 flow [2024-11-28 04:26:18,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2024-11-28 04:26:18,149 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2024-11-28 04:26:18,149 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 304 flow [2024-11-28 04:26:18,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 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) [2024-11-28 04:26:18,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:18,149 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:18,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:26:18,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:18,350 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:18,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1532183905, now seen corresponding path program 4 times [2024-11-28 04:26:18,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:18,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606008973] [2024-11-28 04:26:18,351 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:26:18,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:18,368 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:26:18,368 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:26:18,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:18,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606008973] [2024-11-28 04:26:18,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606008973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:26:18,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:26:18,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:26:18,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985312248] [2024-11-28 04:26:18,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:26:18,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:26:18,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:18,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:26:18,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:26:18,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:26:18,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:18,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:26:18,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:26:18,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:26:18,653 INFO L124 PetriNetUnfolderBase]: 95/169 cut-off events. [2024-11-28 04:26:18,654 INFO L125 PetriNetUnfolderBase]: For 706/706 co-relation queries the response was YES. [2024-11-28 04:26:18,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 169 events. 95/169 cut-off events. For 706/706 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 474 event pairs, 18 based on Foata normal form. 2/170 useless extension candidates. Maximal degree in co-relation 788. Up to 89 conditions per place. [2024-11-28 04:26:18,656 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 34 selfloop transitions, 15 changer transitions 3/53 dead transitions. [2024-11-28 04:26:18,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 508 flow [2024-11-28 04:26:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:26:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:26:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 52 transitions. [2024-11-28 04:26:18,658 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-28 04:26:18,658 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 304 flow. Second operand 6 states and 52 transitions. [2024-11-28 04:26:18,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 508 flow [2024-11-28 04:26:18,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 472 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-28 04:26:18,664 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 350 flow [2024-11-28 04:26:18,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-11-28 04:26:18,665 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2024-11-28 04:26:18,665 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 350 flow [2024-11-28 04:26:18,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:26:18,666 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:26:18,666 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:18,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 04:26:18,666 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:26:18,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:18,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1080076502, now seen corresponding path program 1 times [2024-11-28 04:26:18,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:18,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144716850] [2024-11-28 04:26:18,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:26:18,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:26:18,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:18,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144716850] [2024-11-28 04:26:18,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144716850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:18,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244394407] [2024-11-28 04:26:18,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:26:18,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:18,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:18,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:18,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:26:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:26:19,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:26:19,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:19,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:26:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:26:19,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:20,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 228 [2024-11-28 04:26:21,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:26:21,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 3277 treesize of output 2301 [2024-11-28 04:27:36,514 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 04:27:57,731 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 04:28:18,120 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 04:28:19,174 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-28 04:29:11,375 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-28 04:29:13,937 WARN L672 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2024-11-28 04:29:21,979 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-28 04:30:41,413 WARN L672 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2024-11-28 04:31:51,613 WARN L672 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2024-11-28 04:34:11,540 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-28 04:34:18,353 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 04:34:18,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-28 04:34:18,354 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 04:34:18,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:34:18,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:34:18,555 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-28 04:34:18,561 INFO L158 Benchmark]: Toolchain (without parser) took 490304.55ms. Allocated memory was 167.8MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 131.0MB in the beginning and 946.0MB in the end (delta: -815.0MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-11-28 04:34:18,561 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 167.8MB. Free memory is still 102.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:34:18,562 INFO L158 Benchmark]: CACSL2BoogieTranslator took 443.83ms. Allocated memory is still 167.8MB. Free memory was 130.6MB in the beginning and 118.4MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:34:18,562 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.09ms. Allocated memory is still 167.8MB. Free memory was 118.4MB in the beginning and 116.4MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:34:18,562 INFO L158 Benchmark]: Boogie Preprocessor took 92.53ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 114.5MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:34:18,562 INFO L158 Benchmark]: RCFGBuilder took 1402.78ms. Allocated memory is still 167.8MB. Free memory was 114.5MB in the beginning and 67.9MB in the end (delta: 46.6MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2024-11-28 04:34:18,564 INFO L158 Benchmark]: TraceAbstraction took 488270.55ms. Allocated memory was 167.8MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 67.5MB in the beginning and 946.0MB in the end (delta: -878.5MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2024-11-28 04:34:18,566 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 167.8MB. Free memory is still 102.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 443.83ms. Allocated memory is still 167.8MB. Free memory was 130.6MB in the beginning and 118.4MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.09ms. Allocated memory is still 167.8MB. Free memory was 118.4MB in the beginning and 116.4MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 92.53ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 114.5MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1402.78ms. Allocated memory is still 167.8MB. Free memory was 114.5MB in the beginning and 67.9MB in the end (delta: 46.6MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 488270.55ms. Allocated memory was 167.8MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 67.5MB in the beginning and 946.0MB in the end (delta: -878.5MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/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_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:34:21,432 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:34:21,564 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-28 04:34:21,575 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:34:21,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:34:21,618 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:34:21,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:34:21,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:34:21,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:34:21,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:34:21,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:34:21,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:34:21,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:34:21,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:34:21,623 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:34:21,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:34:21,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:34:21,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:34:21,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:34:21,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:34:21,624 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:34:21,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:34:21,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:34:21,625 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:34:21,625 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:34:21,625 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:34:21,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:34:21,625 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:34:21,626 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:34:21,626 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:34:21,626 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:34:21,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:34:21,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:34:21,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:34:21,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:34:21,627 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:34:21,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:34:21,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:34:21,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:34:21,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:34:21,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:34:21,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:34:21,629 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:34:21,629 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:34:21,629 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:34:21,630 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:34:21,630 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:34:21,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:34:21,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:34:21,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:34:21,630 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_5f16782c-77d3-4564-afb2-0e4a46a03381/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 -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2024-11-28 04:34:21,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:34:22,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:34:22,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:34:22,007 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:34:22,008 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:34:22,009 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-5.wvr.c [2024-11-28 04:34:25,304 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data/daa21c6f4/11a7d0fd66014e14bd6bfc762ab3751d/FLAG83b6621cc [2024-11-28 04:34:25,619 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:34:25,622 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/sv-benchmarks/c/weaver/unroll-5.wvr.c [2024-11-28 04:34:25,634 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data/daa21c6f4/11a7d0fd66014e14bd6bfc762ab3751d/FLAG83b6621cc [2024-11-28 04:34:25,897 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/data/daa21c6f4/11a7d0fd66014e14bd6bfc762ab3751d [2024-11-28 04:34:25,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:34:25,905 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:34:25,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:34:25,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:34:25,914 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:34:25,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:34:25" (1/1) ... [2024-11-28 04:34:25,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d84fa4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:25, skipping insertion in model container [2024-11-28 04:34:25,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:34:25" (1/1) ... [2024-11-28 04:34:25,941 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:34:26,162 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_5f16782c-77d3-4564-afb2-0e4a46a03381/sv-benchmarks/c/weaver/unroll-5.wvr.c[2670,2683] [2024-11-28 04:34:26,169 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:34:26,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:34:26,192 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:34:26,223 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_5f16782c-77d3-4564-afb2-0e4a46a03381/sv-benchmarks/c/weaver/unroll-5.wvr.c[2670,2683] [2024-11-28 04:34:26,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:34:26,245 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:34:26,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26 WrapperNode [2024-11-28 04:34:26,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:34:26,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:34:26,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:34:26,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:34:26,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,296 INFO L138 Inliner]: procedures = 25, calls = 28, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 152 [2024-11-28 04:34:26,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:34:26,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:34:26,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:34:26,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:34:26,308 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,312 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,328 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 04:34:26,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,339 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,352 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:34:26,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:34:26,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:34:26,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:34:26,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (1/1) ... [2024-11-28 04:34:26,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:34:26,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:26,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:34:26,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:34:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:34:26,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:34:26,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:34:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:34:26,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:34:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 04:34:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 04:34:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:34:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 04:34:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 04:34:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:34:26,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:34:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 04:34:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 04:34:26,452 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:34:26,562 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:34:26,566 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:34:27,002 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:34:27,003 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:34:27,499 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:34:27,500 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:34:27,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:34:27 BoogieIcfgContainer [2024-11-28 04:34:27,500 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:34:27,504 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:34:27,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:34:27,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:34:27,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:34:25" (1/3) ... [2024-11-28 04:34:27,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1700f4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:34:27, skipping insertion in model container [2024-11-28 04:34:27,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:34:26" (2/3) ... [2024-11-28 04:34:27,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1700f4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:34:27, skipping insertion in model container [2024-11-28 04:34:27,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:34:27" (3/3) ... [2024-11-28 04:34:27,516 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2024-11-28 04:34:27,535 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:34:27,536 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-5.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 04:34:27,537 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:34:27,614 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 04:34:27,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 04:34:27,694 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-28 04:34:27,697 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:34:27,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-28 04:34:27,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 04:34:27,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-28 04:34:27,715 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:34:27,732 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;@2b235284, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:34:27,734 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 04:34:27,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:34:27,750 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-28 04:34:27,750 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:34:27,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:27,751 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:27,752 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:27,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:27,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1534088774, now seen corresponding path program 1 times [2024-11-28 04:34:27,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:27,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966277799] [2024-11-28 04:34:27,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:34:27,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:27,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:27,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:27,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:34:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:34:27,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:34:27,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:34:28,101 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:28,101 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:28,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966277799] [2024-11-28 04:34:28,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966277799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:28,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:28,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:34:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220781950] [2024-11-28 04:34:28,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:28,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:34:28,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:28,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:34:28,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:34:28,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:28,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:28,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:28,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:28,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:28,350 INFO L124 PetriNetUnfolderBase]: 69/125 cut-off events. [2024-11-28 04:34:28,351 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-28 04:34:28,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 125 events. 69/125 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 329 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2024-11-28 04:34:28,357 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-11-28 04:34:28,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2024-11-28 04:34:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:34:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:34:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-11-28 04:34:28,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-28 04:34:28,378 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 37 transitions. [2024-11-28 04:34:28,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2024-11-28 04:34:28,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 04:34:28,392 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-11-28 04:34:28,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-11-28 04:34:28,400 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-28 04:34:28,401 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-11-28 04:34:28,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:28,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:28,401 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:28,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:34:28,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:28,602 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:28,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2118476683, now seen corresponding path program 1 times [2024-11-28 04:34:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:28,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942500430] [2024-11-28 04:34:28,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:34:28,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:28,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:28,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:34:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:34:28,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:34:28,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:34:28,792 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:28,793 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942500430] [2024-11-28 04:34:28,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942500430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:28,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:28,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:34:28,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668145590] [2024-11-28 04:34:28,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:28,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:34:28,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:28,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:34:28,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:34:28,797 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:28,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:28,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:28,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:28,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:29,008 INFO L124 PetriNetUnfolderBase]: 79/148 cut-off events. [2024-11-28 04:34:29,008 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-28 04:34:29,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 148 events. 79/148 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 412 event pairs, 28 based on Foata normal form. 4/151 useless extension candidates. Maximal degree in co-relation 108. Up to 90 conditions per place. [2024-11-28 04:34:29,012 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 27 selfloop transitions, 4 changer transitions 1/33 dead transitions. [2024-11-28 04:34:29,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 33 transitions, 161 flow [2024-11-28 04:34:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:34:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:34:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-11-28 04:34:29,016 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-28 04:34:29,016 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 4 states and 42 transitions. [2024-11-28 04:34:29,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 33 transitions, 161 flow [2024-11-28 04:34:29,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 33 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:34:29,018 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 81 flow [2024-11-28 04:34:29,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2024-11-28 04:34:29,021 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2024-11-28 04:34:29,022 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 81 flow [2024-11-28 04:34:29,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:29,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:29,022 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:29,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:34:29,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:29,227 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:29,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1017191907, now seen corresponding path program 2 times [2024-11-28 04:34:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:29,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047499138] [2024-11-28 04:34:29,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:34:29,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:29,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:29,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:29,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:34:29,323 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:34:29,323 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:34:29,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:34:29,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:34:29,373 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:29,374 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047499138] [2024-11-28 04:34:29,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047499138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:29,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:29,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:34:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794664991] [2024-11-28 04:34:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:29,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:34:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:29,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:34:29,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:34:29,376 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:29,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:29,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:29,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:29,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:29,501 INFO L124 PetriNetUnfolderBase]: 79/149 cut-off events. [2024-11-28 04:34:29,502 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-11-28 04:34:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 149 events. 79/149 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 389 event pairs, 56 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 210. Up to 147 conditions per place. [2024-11-28 04:34:29,504 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-11-28 04:34:29,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 22 transitions, 125 flow [2024-11-28 04:34:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:34:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:34:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-28 04:34:29,505 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-28 04:34:29,505 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 81 flow. Second operand 3 states and 27 transitions. [2024-11-28 04:34:29,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 22 transitions, 125 flow [2024-11-28 04:34:29,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 118 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-28 04:34:29,508 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 86 flow [2024-11-28 04:34:29,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-11-28 04:34:29,509 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-11-28 04:34:29,509 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 86 flow [2024-11-28 04:34:29,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:29,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:29,510 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:29,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:34:29,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:29,711 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:29,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1852103787, now seen corresponding path program 1 times [2024-11-28 04:34:29,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:29,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579467199] [2024-11-28 04:34:29,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:34:29,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:29,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:29,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:29,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:34:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:34:29,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:34:29,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:34:29,892 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:29,892 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:29,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579467199] [2024-11-28 04:34:29,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579467199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:29,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:29,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:34:29,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808548276] [2024-11-28 04:34:29,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:29,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:34:29,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:29,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:34:29,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:34:29,894 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:29,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:29,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:29,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:29,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:30,136 INFO L124 PetriNetUnfolderBase]: 86/161 cut-off events. [2024-11-28 04:34:30,136 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-28 04:34:30,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 161 events. 86/161 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 458 event pairs, 25 based on Foata normal form. 5/165 useless extension candidates. Maximal degree in co-relation 436. Up to 93 conditions per place. [2024-11-28 04:34:30,138 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 29 selfloop transitions, 4 changer transitions 2/36 dead transitions. [2024-11-28 04:34:30,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 200 flow [2024-11-28 04:34:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:34:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:34:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-11-28 04:34:30,144 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-28 04:34:30,144 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 86 flow. Second operand 4 states and 45 transitions. [2024-11-28 04:34:30,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 200 flow [2024-11-28 04:34:30,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 196 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 04:34:30,149 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 110 flow [2024-11-28 04:34:30,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-11-28 04:34:30,151 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-11-28 04:34:30,152 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 110 flow [2024-11-28 04:34:30,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:30,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:30,153 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:30,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:34:30,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:30,358 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:30,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash -635747541, now seen corresponding path program 1 times [2024-11-28 04:34:30,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:30,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701712778] [2024-11-28 04:34:30,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:34:30,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:30,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:30,363 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:30,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:34:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:34:30,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:34:30,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:34:30,491 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:30,491 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:30,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701712778] [2024-11-28 04:34:30,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701712778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:30,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:30,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:34:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914135911] [2024-11-28 04:34:30,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:30,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:34:30,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:30,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:34:30,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:34:30,493 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:30,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:30,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:30,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:30,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:30,690 INFO L124 PetriNetUnfolderBase]: 94/182 cut-off events. [2024-11-28 04:34:30,690 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2024-11-28 04:34:30,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 182 events. 94/182 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 589 event pairs, 32 based on Foata normal form. 6/187 useless extension candidates. Maximal degree in co-relation 540. Up to 115 conditions per place. [2024-11-28 04:34:30,694 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 33 selfloop transitions, 4 changer transitions 5/43 dead transitions. [2024-11-28 04:34:30,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 275 flow [2024-11-28 04:34:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:34:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:34:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-11-28 04:34:30,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-28 04:34:30,696 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 110 flow. Second operand 4 states and 45 transitions. [2024-11-28 04:34:30,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 275 flow [2024-11-28 04:34:30,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 43 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:34:30,699 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 137 flow [2024-11-28 04:34:30,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2024-11-28 04:34:30,700 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2024-11-28 04:34:30,700 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 137 flow [2024-11-28 04:34:30,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:30,701 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:30,701 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:30,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:34:30,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:30,902 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:30,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:30,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1461977765, now seen corresponding path program 2 times [2024-11-28 04:34:30,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:30,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078235504] [2024-11-28 04:34:30,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:34:30,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:30,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:30,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:30,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:34:31,007 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:34:31,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:34:31,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:34:31,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:34:31,059 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:31,059 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:31,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078235504] [2024-11-28 04:34:31,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078235504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:31,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:31,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:34:31,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607864049] [2024-11-28 04:34:31,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:31,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:34:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:31,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:34:31,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:34:31,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:31,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:31,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:31,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:31,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:31,276 INFO L124 PetriNetUnfolderBase]: 100/192 cut-off events. [2024-11-28 04:34:31,276 INFO L125 PetriNetUnfolderBase]: For 290/290 co-relation queries the response was YES. [2024-11-28 04:34:31,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 192 events. 100/192 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 591 event pairs, 37 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 679. Up to 125 conditions per place. [2024-11-28 04:34:31,282 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 29 selfloop transitions, 4 changer transitions 4/38 dead transitions. [2024-11-28 04:34:31,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 266 flow [2024-11-28 04:34:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:34:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:34:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-28 04:34:31,285 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-28 04:34:31,286 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 137 flow. Second operand 4 states and 44 transitions. [2024-11-28 04:34:31,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 266 flow [2024-11-28 04:34:31,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 255 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-28 04:34:31,289 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 160 flow [2024-11-28 04:34:31,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2024-11-28 04:34:31,293 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2024-11-28 04:34:31,293 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 160 flow [2024-11-28 04:34:31,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:31,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:31,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:31,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:34:31,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:31,500 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:31,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:31,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1442758135, now seen corresponding path program 2 times [2024-11-28 04:34:31,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:31,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379810865] [2024-11-28 04:34:31,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:34:31,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:31,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:31,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:31,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:34:31,580 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:34:31,580 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:34:31,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:34:31,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:34:31,621 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:31,621 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:31,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379810865] [2024-11-28 04:34:31,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379810865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:31,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:31,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:34:31,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100434976] [2024-11-28 04:34:31,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:31,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:34:31,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:31,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:34:31,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:34:31,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:31,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:31,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:31,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:31,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:31,770 INFO L124 PetriNetUnfolderBase]: 102/191 cut-off events. [2024-11-28 04:34:31,770 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-28 04:34:31,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 191 events. 102/191 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 581 event pairs, 35 based on Foata normal form. 5/195 useless extension candidates. Maximal degree in co-relation 705. Up to 131 conditions per place. [2024-11-28 04:34:31,772 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 29 selfloop transitions, 8 changer transitions 3/41 dead transitions. [2024-11-28 04:34:31,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 310 flow [2024-11-28 04:34:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:34:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:34:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-11-28 04:34:31,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-28 04:34:31,774 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 160 flow. Second operand 4 states and 42 transitions. [2024-11-28 04:34:31,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 310 flow [2024-11-28 04:34:31,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 297 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-28 04:34:31,778 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 194 flow [2024-11-28 04:34:31,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2024-11-28 04:34:31,779 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-11-28 04:34:31,779 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 194 flow [2024-11-28 04:34:31,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:31,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:31,780 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:31,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:34:31,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:31,981 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:31,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:31,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2107256589, now seen corresponding path program 3 times [2024-11-28 04:34:31,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:31,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777609573] [2024-11-28 04:34:31,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:34:31,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:31,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:31,985 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:31,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:34:32,086 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:34:32,087 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:34:32,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:34:32,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:34:32,126 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:32,127 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777609573] [2024-11-28 04:34:32,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777609573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:32,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:32,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:34:32,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18361246] [2024-11-28 04:34:32,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:32,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:34:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:32,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:34:32,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:34:32,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:32,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:32,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:32,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:32,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:32,300 INFO L124 PetriNetUnfolderBase]: 95/171 cut-off events. [2024-11-28 04:34:32,302 INFO L125 PetriNetUnfolderBase]: For 416/416 co-relation queries the response was YES. [2024-11-28 04:34:32,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 171 events. 95/171 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 496 event pairs, 28 based on Foata normal form. 4/174 useless extension candidates. Maximal degree in co-relation 681. Up to 120 conditions per place. [2024-11-28 04:34:32,305 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 30 selfloop transitions, 9 changer transitions 2/42 dead transitions. [2024-11-28 04:34:32,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 342 flow [2024-11-28 04:34:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:34:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:34:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-11-28 04:34:32,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-28 04:34:32,307 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 194 flow. Second operand 4 states and 42 transitions. [2024-11-28 04:34:32,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 342 flow [2024-11-28 04:34:32,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 314 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-28 04:34:32,312 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 220 flow [2024-11-28 04:34:32,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2024-11-28 04:34:32,314 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-11-28 04:34:32,315 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 220 flow [2024-11-28 04:34:32,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:32,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:32,316 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:32,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:34:32,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:32,520 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:32,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:32,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2030056890, now seen corresponding path program 1 times [2024-11-28 04:34:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:32,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047181779] [2024-11-28 04:34:32,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:34:32,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:32,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:32,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:32,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:34:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:34:32,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:34:32,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:34:32,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:34:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:34:32,992 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047181779] [2024-11-28 04:34:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047181779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:34:32,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:34:32,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2024-11-28 04:34:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552371512] [2024-11-28 04:34:32,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:34:32,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:34:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:32,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:34:32,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:34:32,995 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:34:32,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 220 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:32,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:34:32,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:34:32,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:34:34,259 INFO L124 PetriNetUnfolderBase]: 196/338 cut-off events. [2024-11-28 04:34:34,259 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2024-11-28 04:34:34,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 338 events. 196/338 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1153 event pairs, 11 based on Foata normal form. 15/352 useless extension candidates. Maximal degree in co-relation 1337. Up to 152 conditions per place. [2024-11-28 04:34:34,263 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 75 selfloop transitions, 39 changer transitions 0/115 dead transitions. [2024-11-28 04:34:34,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 115 transitions, 886 flow [2024-11-28 04:34:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:34:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 04:34:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 143 transitions. [2024-11-28 04:34:34,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42058823529411765 [2024-11-28 04:34:34,266 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 220 flow. Second operand 17 states and 143 transitions. [2024-11-28 04:34:34,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 115 transitions, 886 flow [2024-11-28 04:34:34,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 115 transitions, 868 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 04:34:34,273 INFO L231 Difference]: Finished difference. Result has 54 places, 64 transitions, 558 flow [2024-11-28 04:34:34,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=558, PETRI_PLACES=54, PETRI_TRANSITIONS=64} [2024-11-28 04:34:34,274 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-11-28 04:34:34,274 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 64 transitions, 558 flow [2024-11-28 04:34:34,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:34:34,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:34:34,274 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:34,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:34:34,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:34,475 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:34:34,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:34,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1534779619, now seen corresponding path program 2 times [2024-11-28 04:34:34,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:34,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599777767] [2024-11-28 04:34:34,477 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:34:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:34,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:34,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f16782c-77d3-4564-afb2-0e4a46a03381/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:34:34,581 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:34:34,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:34:34,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:34:34,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:34,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:34:35,361 INFO L349 Elim1Store]: treesize reduction 47, result has 66.7 percent of original size [2024-11-28 04:34:35,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 97 treesize of output 126 [2024-11-28 04:34:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:34:37,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:34:39,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 194 [2024-11-28 04:34:41,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:34:41,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 4807 treesize of output 3843