./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.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_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/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_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/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_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/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 ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:32:46,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:32:46,788 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:32:46,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:32:46,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:32:46,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:32:46,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:32:46,838 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:32:46,838 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:32:46,840 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:32:46,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:32:46,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:32:46,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:32:46,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:32:46,842 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:32:46,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:32:46,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:32:46,843 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:32:46,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:32:46,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:32:46,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:32:46,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:32:46,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:32:46,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:32:46,844 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:32:46,844 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:32:46,845 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:32:46,845 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:32:46,845 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:32:46,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:32:46,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:32:46,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:32:46,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:32:46,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:32:46,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:32:46,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:32:46,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:32:46,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:32:46,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:32:46,847 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:32:46,847 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:32:46,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:32:46,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:32:46,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:32:46,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:32:46,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:32:46,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:32:46,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:32:46,848 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_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/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 -> ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d [2024-11-28 03:32:47,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:32:47,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:32:47,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:32:47,220 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:32:47,220 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:32:47,222 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2024-11-28 03:32:50,213 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/data/bc68eda35/c8cfe15c51e5443eae81a014cd3ed2ac/FLAGf2dca42dd [2024-11-28 03:32:50,596 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:32:50,597 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2024-11-28 03:32:50,616 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/data/bc68eda35/c8cfe15c51e5443eae81a014cd3ed2ac/FLAGf2dca42dd [2024-11-28 03:32:50,642 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/data/bc68eda35/c8cfe15c51e5443eae81a014cd3ed2ac [2024-11-28 03:32:50,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:32:50,647 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:32:50,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:32:50,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:32:50,656 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:32:50,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:32:50" (1/1) ... [2024-11-28 03:32:50,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdf783a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:50, skipping insertion in model container [2024-11-28 03:32:50,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:32:50" (1/1) ... [2024-11-28 03:32:50,687 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:32:50,952 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_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3463,3476] [2024-11-28 03:32:50,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:32:50,985 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:32:51,026 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_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3463,3476] [2024-11-28 03:32:51,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:32:51,059 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:32:51,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51 WrapperNode [2024-11-28 03:32:51,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:32:51,062 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:32:51,063 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:32:51,063 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:32:51,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,093 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,139 INFO L138 Inliner]: procedures = 24, calls = 40, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 234 [2024-11-28 03:32:51,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:32:51,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:32:51,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:32:51,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:32:51,153 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,157 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,185 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 2 writes are split as follows [0, 2]. [2024-11-28 03:32:51,185 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,194 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,195 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,200 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,202 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:32:51,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:32:51,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:32:51,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:32:51,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (1/1) ... [2024-11-28 03:32:51,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:32:51,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:32:51,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:32:51,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:32:51,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:32:51,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:32:51,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:32:51,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:32:51,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:32:51,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 03:32:51,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 03:32:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:32:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:32:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:32:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:32:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 03:32:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 03:32:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:32:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:32:51,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:32:51,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:32:51,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:32:51,309 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 03:32:51,490 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:32:51,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:32:51,983 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:32:51,983 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:32:52,410 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:32:52,410 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-28 03:32:52,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:32:52 BoogieIcfgContainer [2024-11-28 03:32:52,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:32:52,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:32:52,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:32:52,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:32:52,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:32:50" (1/3) ... [2024-11-28 03:32:52,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6158976b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:32:52, skipping insertion in model container [2024-11-28 03:32:52,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:51" (2/3) ... [2024-11-28 03:32:52,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6158976b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:32:52, skipping insertion in model container [2024-11-28 03:32:52,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:32:52" (3/3) ... [2024-11-28 03:32:52,423 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2024-11-28 03:32:52,441 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:32:52,443 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-horseshoe.wvr.c that has 4 procedures, 36 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-28 03:32:52,444 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:32:52,524 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 03:32:52,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 109 flow [2024-11-28 03:32:52,626 INFO L124 PetriNetUnfolderBase]: 9/41 cut-off events. [2024-11-28 03:32:52,629 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:32:52,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 9/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-11-28 03:32:52,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 109 flow [2024-11-28 03:32:52,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 98 flow [2024-11-28 03:32:52,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:32:52,673 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;@2ac5a2c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:32:52,674 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 03:32:52,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:32:52,701 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2024-11-28 03:32:52,701 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:32:52,701 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:52,702 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:52,703 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:32:52,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 556344666, now seen corresponding path program 1 times [2024-11-28 03:32:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:52,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996222376] [2024-11-28 03:32:52,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:52,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:53,034 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 03:32:53,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:53,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996222376] [2024-11-28 03:32:53,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996222376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:32:53,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:32:53,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:32:53,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372530600] [2024-11-28 03:32:53,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:32:53,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:32:53,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:53,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:32:53,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:32:53,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:32:53,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 98 flow. Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 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 03:32:53,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:53,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:32:53,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:53,519 INFO L124 PetriNetUnfolderBase]: 745/1281 cut-off events. [2024-11-28 03:32:53,519 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-28 03:32:53,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1281 events. 745/1281 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6157 event pairs, 595 based on Foata normal form. 0/1162 useless extension candidates. Maximal degree in co-relation 2210. Up to 991 conditions per place. [2024-11-28 03:32:53,546 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 28 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2024-11-28 03:32:53,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 146 flow [2024-11-28 03:32:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:32:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-28 03:32:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2024-11-28 03:32:53,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-11-28 03:32:53,568 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 98 flow. Second operand 2 states and 54 transitions. [2024-11-28 03:32:53,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 146 flow [2024-11-28 03:32:53,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:32:53,581 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 78 flow [2024-11-28 03:32:53,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2024-11-28 03:32:53,589 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-28 03:32:53,589 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 78 flow [2024-11-28 03:32:53,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 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 03:32:53,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:53,590 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:53,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:32:53,591 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:32:53,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1986402807, now seen corresponding path program 1 times [2024-11-28 03:32:53,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:53,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337824899] [2024-11-28 03:32:53,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:53,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:54,081 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 03:32:54,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:54,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337824899] [2024-11-28 03:32:54,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337824899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:32:54,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:32:54,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:32:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931670788] [2024-11-28 03:32:54,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:32:54,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:32:54,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:54,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:32:54,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:32:54,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:32:54,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 03:32:54,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:54,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:32:54,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:54,497 INFO L124 PetriNetUnfolderBase]: 846/1478 cut-off events. [2024-11-28 03:32:54,497 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-28 03:32:54,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1478 events. 846/1478 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7323 event pairs, 682 based on Foata normal form. 73/1418 useless extension candidates. Maximal degree in co-relation 2674. Up to 991 conditions per place. [2024-11-28 03:32:54,511 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 27 selfloop transitions, 2 changer transitions 17/54 dead transitions. [2024-11-28 03:32:54,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 209 flow [2024-11-28 03:32:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:32:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:32:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-28 03:32:54,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-11-28 03:32:54,517 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 78 flow. Second operand 5 states and 104 transitions. [2024-11-28 03:32:54,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 209 flow [2024-11-28 03:32:54,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 03:32:54,521 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 100 flow [2024-11-28 03:32:54,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-11-28 03:32:54,522 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-11-28 03:32:54,524 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 100 flow [2024-11-28 03:32:54,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 03:32:54,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:54,526 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:54,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:32:54,528 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:32:54,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 980201891, now seen corresponding path program 1 times [2024-11-28 03:32:54,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:54,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983525800] [2024-11-28 03:32:54,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:54,870 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 03:32:54,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:54,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983525800] [2024-11-28 03:32:54,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983525800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:32:54,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:32:54,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:32:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150231328] [2024-11-28 03:32:54,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:32:54,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:32:54,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:32:54,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:32:54,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:32:54,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:32:54,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 03:32:54,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:32:54,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:32:54,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:32:55,259 INFO L124 PetriNetUnfolderBase]: 945/1612 cut-off events. [2024-11-28 03:32:55,260 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-28 03:32:55,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 1612 events. 945/1612 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7931 event pairs, 775 based on Foata normal form. 77/1569 useless extension candidates. Maximal degree in co-relation 3248. Up to 989 conditions per place. [2024-11-28 03:32:55,274 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 26 selfloop transitions, 4 changer transitions 17/55 dead transitions. [2024-11-28 03:32:55,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 244 flow [2024-11-28 03:32:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:32:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:32:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-28 03:32:55,277 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-11-28 03:32:55,277 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 100 flow. Second operand 5 states and 104 transitions. [2024-11-28 03:32:55,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 244 flow [2024-11-28 03:32:55,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 232 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-28 03:32:55,282 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 114 flow [2024-11-28 03:32:55,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-11-28 03:32:55,284 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-11-28 03:32:55,284 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 114 flow [2024-11-28 03:32:55,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 03:32:55,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:32:55,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:32:55,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:32:55,286 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:32:55,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:32:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2124914011, now seen corresponding path program 1 times [2024-11-28 03:32:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:32:55,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684555988] [2024-11-28 03:32:55,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:55,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:32:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:58,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:32:58,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684555988] [2024-11-28 03:32:58,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684555988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:32:58,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766152430] [2024-11-28 03:32:58,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:32:58,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:32:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:32:58,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:32:58,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:32:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:32:58,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 03:32:58,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:32:58,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 03:32:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:32:59,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:01,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:33:01,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 188 [2024-11-28 03:33:01,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:33:01,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-11-28 03:33:01,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:33:01,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 125 [2024-11-28 03:33:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:02,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766152430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:02,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:02,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-11-28 03:33:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867123775] [2024-11-28 03:33:02,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:02,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 03:33:02,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:02,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 03:33:02,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:33:02,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 44 [2024-11-28 03:33:02,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 114 flow. Second operand has 37 states, 37 states have (on average 8.216216216216216) internal successors, (304), 37 states have internal predecessors, (304), 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 03:33:02,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:02,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 44 [2024-11-28 03:33:02,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:13,403 INFO L124 PetriNetUnfolderBase]: 4611/6984 cut-off events. [2024-11-28 03:33:13,404 INFO L125 PetriNetUnfolderBase]: For 1193/1193 co-relation queries the response was YES. [2024-11-28 03:33:13,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15693 conditions, 6984 events. 4611/6984 cut-off events. For 1193/1193 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 36346 event pairs, 361 based on Foata normal form. 47/6838 useless extension candidates. Maximal degree in co-relation 15685. Up to 2082 conditions per place. [2024-11-28 03:33:13,448 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 352 selfloop transitions, 120 changer transitions 2/477 dead transitions. [2024-11-28 03:33:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 477 transitions, 2257 flow [2024-11-28 03:33:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 03:33:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-28 03:33:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 763 transitions. [2024-11-28 03:33:13,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36895551257253384 [2024-11-28 03:33:13,460 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 114 flow. Second operand 47 states and 763 transitions. [2024-11-28 03:33:13,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 477 transitions, 2257 flow [2024-11-28 03:33:13,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 477 transitions, 2245 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 03:33:13,474 INFO L231 Difference]: Finished difference. Result has 103 places, 167 transitions, 994 flow [2024-11-28 03:33:13,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=994, PETRI_PLACES=103, PETRI_TRANSITIONS=167} [2024-11-28 03:33:13,475 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-11-28 03:33:13,476 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 167 transitions, 994 flow [2024-11-28 03:33:13,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.216216216216216) internal successors, (304), 37 states have internal predecessors, (304), 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 03:33:13,476 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:13,476 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:13,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:33:13,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:13,681 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:13,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash -620550285, now seen corresponding path program 2 times [2024-11-28 03:33:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:13,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222918559] [2024-11-28 03:33:13,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:13,746 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:33:13,746 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:33:14,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222918559] [2024-11-28 03:33:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222918559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:14,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:33:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998235841] [2024-11-28 03:33:14,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:14,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:33:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:14,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:33:14,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:33:14,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 03:33:14,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 167 transitions, 994 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 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 03:33:14,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:14,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 03:33:14,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:15,632 INFO L124 PetriNetUnfolderBase]: 4790/7560 cut-off events. [2024-11-28 03:33:15,632 INFO L125 PetriNetUnfolderBase]: For 23790/23794 co-relation queries the response was YES. [2024-11-28 03:33:15,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23781 conditions, 7560 events. 4790/7560 cut-off events. For 23790/23794 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 43327 event pairs, 1160 based on Foata normal form. 164/7690 useless extension candidates. Maximal degree in co-relation 23759. Up to 5230 conditions per place. [2024-11-28 03:33:15,708 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 208 selfloop transitions, 34 changer transitions 1/249 dead transitions. [2024-11-28 03:33:15,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 249 transitions, 1839 flow [2024-11-28 03:33:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:33:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:33:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-11-28 03:33:15,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-11-28 03:33:15,710 INFO L175 Difference]: Start difference. First operand has 103 places, 167 transitions, 994 flow. Second operand 8 states and 153 transitions. [2024-11-28 03:33:15,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 249 transitions, 1839 flow [2024-11-28 03:33:15,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 249 transitions, 1612 flow, removed 108 selfloop flow, removed 3 redundant places. [2024-11-28 03:33:15,890 INFO L231 Difference]: Finished difference. Result has 112 places, 181 transitions, 1093 flow [2024-11-28 03:33:15,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1093, PETRI_PLACES=112, PETRI_TRANSITIONS=181} [2024-11-28 03:33:15,891 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-11-28 03:33:15,891 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 181 transitions, 1093 flow [2024-11-28 03:33:15,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 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 03:33:15,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:15,891 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:15,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:33:15,891 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:15,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:15,892 INFO L85 PathProgramCache]: Analyzing trace with hash 263157629, now seen corresponding path program 3 times [2024-11-28 03:33:15,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:15,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117946617] [2024-11-28 03:33:15,892 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:33:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:15,945 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:33:15,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:33:16,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:16,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117946617] [2024-11-28 03:33:16,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117946617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:16,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:16,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:33:16,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430210511] [2024-11-28 03:33:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:16,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:33:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:16,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:33:16,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:33:16,448 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 03:33:16,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 181 transitions, 1093 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 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 03:33:16,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:16,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 03:33:16,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:17,516 INFO L124 PetriNetUnfolderBase]: 4578/7305 cut-off events. [2024-11-28 03:33:17,516 INFO L125 PetriNetUnfolderBase]: For 30224/30228 co-relation queries the response was YES. [2024-11-28 03:33:17,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24424 conditions, 7305 events. 4578/7305 cut-off events. For 30224/30228 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 42261 event pairs, 1164 based on Foata normal form. 66/7337 useless extension candidates. Maximal degree in co-relation 24397. Up to 5133 conditions per place. [2024-11-28 03:33:17,562 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 193 selfloop transitions, 30 changer transitions 2/231 dead transitions. [2024-11-28 03:33:17,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 231 transitions, 1688 flow [2024-11-28 03:33:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:33:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:33:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-11-28 03:33:17,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-11-28 03:33:17,564 INFO L175 Difference]: Start difference. First operand has 112 places, 181 transitions, 1093 flow. Second operand 8 states and 145 transitions. [2024-11-28 03:33:17,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 231 transitions, 1688 flow [2024-11-28 03:33:17,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 231 transitions, 1636 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-11-28 03:33:17,744 INFO L231 Difference]: Finished difference. Result has 120 places, 181 transitions, 1121 flow [2024-11-28 03:33:17,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1121, PETRI_PLACES=120, PETRI_TRANSITIONS=181} [2024-11-28 03:33:17,745 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-11-28 03:33:17,746 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 181 transitions, 1121 flow [2024-11-28 03:33:17,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 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 03:33:17,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:17,746 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:17,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:33:17,747 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:17,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:17,747 INFO L85 PathProgramCache]: Analyzing trace with hash -104058355, now seen corresponding path program 1 times [2024-11-28 03:33:17,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:17,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733182173] [2024-11-28 03:33:17,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:33:17,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733182173] [2024-11-28 03:33:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733182173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:17,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:17,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:33:17,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653168591] [2024-11-28 03:33:17,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:17,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:33:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:17,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:33:17,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:33:17,825 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:33:17,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 181 transitions, 1121 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 03:33:17,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:17,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:33:17,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:18,524 INFO L124 PetriNetUnfolderBase]: 3259/5846 cut-off events. [2024-11-28 03:33:18,524 INFO L125 PetriNetUnfolderBase]: For 19876/19906 co-relation queries the response was YES. [2024-11-28 03:33:18,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18943 conditions, 5846 events. 3259/5846 cut-off events. For 19876/19906 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 38378 event pairs, 1057 based on Foata normal form. 120/5730 useless extension candidates. Maximal degree in co-relation 18914. Up to 2985 conditions per place. [2024-11-28 03:33:18,570 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 121 selfloop transitions, 8 changer transitions 0/182 dead transitions. [2024-11-28 03:33:18,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 182 transitions, 1395 flow [2024-11-28 03:33:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:33:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:33:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-28 03:33:18,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-11-28 03:33:18,571 INFO L175 Difference]: Start difference. First operand has 120 places, 181 transitions, 1121 flow. Second operand 3 states and 74 transitions. [2024-11-28 03:33:18,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 182 transitions, 1395 flow [2024-11-28 03:33:18,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 182 transitions, 1320 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-11-28 03:33:18,704 INFO L231 Difference]: Finished difference. Result has 115 places, 171 transitions, 1026 flow [2024-11-28 03:33:18,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1026, PETRI_PLACES=115, PETRI_TRANSITIONS=171} [2024-11-28 03:33:18,705 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-11-28 03:33:18,705 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 171 transitions, 1026 flow [2024-11-28 03:33:18,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 03:33:18,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:18,705 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:18,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:33:18,706 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:18,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash -658692885, now seen corresponding path program 2 times [2024-11-28 03:33:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:18,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272406199] [2024-11-28 03:33:18,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:18,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:18,744 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:33:18,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:33:18,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:18,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272406199] [2024-11-28 03:33:18,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272406199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:18,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:18,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:33:18,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902898309] [2024-11-28 03:33:18,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:18,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:33:18,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:18,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:33:18,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:33:18,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 03:33:18,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 171 transitions, 1026 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:33:18,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:18,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 03:33:18,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:19,783 INFO L124 PetriNetUnfolderBase]: 3671/6401 cut-off events. [2024-11-28 03:33:19,784 INFO L125 PetriNetUnfolderBase]: For 21843/21921 co-relation queries the response was YES. [2024-11-28 03:33:19,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21541 conditions, 6401 events. 3671/6401 cut-off events. For 21843/21921 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 40972 event pairs, 742 based on Foata normal form. 195/6346 useless extension candidates. Maximal degree in co-relation 21512. Up to 2995 conditions per place. [2024-11-28 03:33:19,833 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 138 selfloop transitions, 24 changer transitions 0/210 dead transitions. [2024-11-28 03:33:19,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 210 transitions, 1541 flow [2024-11-28 03:33:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:33:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:33:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-28 03:33:19,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-11-28 03:33:19,834 INFO L175 Difference]: Start difference. First operand has 115 places, 171 transitions, 1026 flow. Second operand 5 states and 118 transitions. [2024-11-28 03:33:19,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 210 transitions, 1541 flow [2024-11-28 03:33:19,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 210 transitions, 1507 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-11-28 03:33:19,919 INFO L231 Difference]: Finished difference. Result has 116 places, 169 transitions, 1076 flow [2024-11-28 03:33:19,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1076, PETRI_PLACES=116, PETRI_TRANSITIONS=169} [2024-11-28 03:33:19,919 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-11-28 03:33:19,920 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 169 transitions, 1076 flow [2024-11-28 03:33:19,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:33:19,920 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:19,920 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:19,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:33:19,920 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:19,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1914114379, now seen corresponding path program 1 times [2024-11-28 03:33:19,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:19,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203834700] [2024-11-28 03:33:19,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:19,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:33:20,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:20,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203834700] [2024-11-28 03:33:20,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203834700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:20,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568328908] [2024-11-28 03:33:20,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:20,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:20,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:20,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:33:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:20,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:33:20,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:33:20,253 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:33:20,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568328908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:20,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:33:20,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-28 03:33:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517980245] [2024-11-28 03:33:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:20,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:33:20,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:20,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:33:20,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:33:20,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:33:20,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 169 transitions, 1076 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 03:33:20,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:20,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:33:20,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:21,141 INFO L124 PetriNetUnfolderBase]: 3897/7132 cut-off events. [2024-11-28 03:33:21,141 INFO L125 PetriNetUnfolderBase]: For 25005/25123 co-relation queries the response was YES. [2024-11-28 03:33:21,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24152 conditions, 7132 events. 3897/7132 cut-off events. For 25005/25123 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 48523 event pairs, 1329 based on Foata normal form. 226/7082 useless extension candidates. Maximal degree in co-relation 24123. Up to 2920 conditions per place. [2024-11-28 03:33:21,178 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 122 selfloop transitions, 29 changer transitions 25/208 dead transitions. [2024-11-28 03:33:21,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 208 transitions, 1608 flow [2024-11-28 03:33:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:33:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:33:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-11-28 03:33:21,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-11-28 03:33:21,180 INFO L175 Difference]: Start difference. First operand has 116 places, 169 transitions, 1076 flow. Second operand 4 states and 108 transitions. [2024-11-28 03:33:21,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 208 transitions, 1608 flow [2024-11-28 03:33:21,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 208 transitions, 1577 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-28 03:33:21,308 INFO L231 Difference]: Finished difference. Result has 117 places, 139 transitions, 911 flow [2024-11-28 03:33:21,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=911, PETRI_PLACES=117, PETRI_TRANSITIONS=139} [2024-11-28 03:33:21,310 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-11-28 03:33:21,310 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 139 transitions, 911 flow [2024-11-28 03:33:21,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 03:33:21,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:21,311 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:21,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:33:21,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:33:21,511 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:21,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash -102313189, now seen corresponding path program 1 times [2024-11-28 03:33:21,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:21,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842947425] [2024-11-28 03:33:21,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:21,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:21,658 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 03:33:21,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:21,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842947425] [2024-11-28 03:33:21,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842947425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:21,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306766909] [2024-11-28 03:33:21,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:21,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:21,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:21,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:21,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:33:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:21,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:33:21,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:21,853 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 03:33:21,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:21,958 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 03:33:21,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306766909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:21,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:21,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 03:33:21,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859227062] [2024-11-28 03:33:21,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:21,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:33:21,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:21,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:33:21,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:33:21,964 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:33:21,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 139 transitions, 911 flow. Second operand has 12 states, 12 states have (on average 15.5) internal successors, (186), 12 states have internal predecessors, (186), 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 03:33:21,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:21,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:33:21,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:22,916 INFO L124 PetriNetUnfolderBase]: 3675/6744 cut-off events. [2024-11-28 03:33:22,916 INFO L125 PetriNetUnfolderBase]: For 33674/33770 co-relation queries the response was YES. [2024-11-28 03:33:22,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24627 conditions, 6744 events. 3675/6744 cut-off events. For 33674/33770 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 45265 event pairs, 1908 based on Foata normal form. 499/6966 useless extension candidates. Maximal degree in co-relation 24597. Up to 3044 conditions per place. [2024-11-28 03:33:22,969 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 59 selfloop transitions, 3 changer transitions 62/137 dead transitions. [2024-11-28 03:33:22,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1116 flow [2024-11-28 03:33:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:33:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:33:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-11-28 03:33:22,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-11-28 03:33:22,971 INFO L175 Difference]: Start difference. First operand has 117 places, 139 transitions, 911 flow. Second operand 7 states and 137 transitions. [2024-11-28 03:33:22,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1116 flow [2024-11-28 03:33:23,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 1028 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-11-28 03:33:23,131 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 450 flow [2024-11-28 03:33:23,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-11-28 03:33:23,132 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-11-28 03:33:23,132 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 450 flow [2024-11-28 03:33:23,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.5) internal successors, (186), 12 states have internal predecessors, (186), 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 03:33:23,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:23,132 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:23,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:33:23,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:33:23,333 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:23,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1825735803, now seen corresponding path program 2 times [2024-11-28 03:33:23,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:23,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072579688] [2024-11-28 03:33:23,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:23,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:23,376 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:33:23,376 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:33:23,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:23,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072579688] [2024-11-28 03:33:23,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072579688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:23,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687242602] [2024-11-28 03:33:23,505 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:33:23,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:23,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:23,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:23,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:33:23,623 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:33:23,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:23,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:33:23,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:33:23,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:33:23,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687242602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:23,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:23,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 03:33:23,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41256225] [2024-11-28 03:33:23,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:23,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:33:23,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:23,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:33:23,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:33:23,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:33:23,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 450 flow. Second operand has 12 states, 12 states have (on average 14.5) internal successors, (174), 12 states have internal predecessors, (174), 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 03:33:23,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:23,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:33:23,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:24,475 INFO L124 PetriNetUnfolderBase]: 3096/5586 cut-off events. [2024-11-28 03:33:24,475 INFO L125 PetriNetUnfolderBase]: For 23539/23611 co-relation queries the response was YES. [2024-11-28 03:33:24,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19790 conditions, 5586 events. 3096/5586 cut-off events. For 23539/23611 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 35832 event pairs, 1631 based on Foata normal form. 121/5466 useless extension candidates. Maximal degree in co-relation 19765. Up to 2936 conditions per place. [2024-11-28 03:33:24,509 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 51 selfloop transitions, 10 changer transitions 43/117 dead transitions. [2024-11-28 03:33:24,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 117 transitions, 917 flow [2024-11-28 03:33:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:33:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:33:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-11-28 03:33:24,511 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-11-28 03:33:24,511 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 450 flow. Second operand 9 states and 163 transitions. [2024-11-28 03:33:24,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 117 transitions, 917 flow [2024-11-28 03:33:24,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 117 transitions, 814 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-11-28 03:33:24,594 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 424 flow [2024-11-28 03:33:24,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=424, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-11-28 03:33:24,594 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-11-28 03:33:24,594 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 424 flow [2024-11-28 03:33:24,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.5) internal successors, (174), 12 states have internal predecessors, (174), 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 03:33:24,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:24,595 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:24,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:33:24,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:24,795 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:24,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1528506713, now seen corresponding path program 3 times [2024-11-28 03:33:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464438390] [2024-11-28 03:33:24,796 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:33:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:24,881 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:33:24,881 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:33:25,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464438390] [2024-11-28 03:33:25,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464438390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:25,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:25,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:33:25,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151091957] [2024-11-28 03:33:25,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:25,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:33:25,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:25,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:33:25,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:33:25,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 03:33:25,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 424 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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 03:33:25,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:25,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 03:33:25,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:26,861 INFO L124 PetriNetUnfolderBase]: 6252/9628 cut-off events. [2024-11-28 03:33:26,862 INFO L125 PetriNetUnfolderBase]: For 20734/20756 co-relation queries the response was YES. [2024-11-28 03:33:26,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30603 conditions, 9628 events. 6252/9628 cut-off events. For 20734/20756 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 54929 event pairs, 360 based on Foata normal form. 22/9255 useless extension candidates. Maximal degree in co-relation 30584. Up to 3038 conditions per place. [2024-11-28 03:33:26,903 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 160 selfloop transitions, 34 changer transitions 1/203 dead transitions. [2024-11-28 03:33:26,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 203 transitions, 1425 flow [2024-11-28 03:33:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:33:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:33:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-11-28 03:33:26,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-11-28 03:33:26,905 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 424 flow. Second operand 11 states and 221 transitions. [2024-11-28 03:33:26,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 203 transitions, 1425 flow [2024-11-28 03:33:26,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 203 transitions, 1389 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-28 03:33:26,967 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 725 flow [2024-11-28 03:33:26,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=725, PETRI_PLACES=79, PETRI_TRANSITIONS=100} [2024-11-28 03:33:26,968 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-11-28 03:33:26,969 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 725 flow [2024-11-28 03:33:26,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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 03:33:26,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:26,969 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:26,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:33:26,969 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:26,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:26,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1056696699, now seen corresponding path program 4 times [2024-11-28 03:33:26,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:26,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493749165] [2024-11-28 03:33:26,970 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:33:26,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:27,008 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:33:27,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:28,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:28,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493749165] [2024-11-28 03:33:28,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493749165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:28,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889864472] [2024-11-28 03:33:28,614 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:33:28,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:28,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:28,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:28,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:33:28,749 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:33:28,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:28,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 03:33:28,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:29,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:33:29,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2024-11-28 03:33:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:29,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:30,240 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-11-28 03:33:30,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 101 [2024-11-28 03:33:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:31,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889864472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:31,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:31,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2024-11-28 03:33:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269871824] [2024-11-28 03:33:31,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:31,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 03:33:31,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:31,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 03:33:31,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 03:33:31,734 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-28 03:33:31,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 100 transitions, 725 flow. Second operand has 41 states, 41 states have (on average 10.268292682926829) internal successors, (421), 41 states have internal predecessors, (421), 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 03:33:31,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:31,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-28 03:33:31,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:33:45,775 INFO L124 PetriNetUnfolderBase]: 29232/45914 cut-off events. [2024-11-28 03:33:45,775 INFO L125 PetriNetUnfolderBase]: For 175684/177490 co-relation queries the response was YES. [2024-11-28 03:33:45,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167242 conditions, 45914 events. 29232/45914 cut-off events. For 175684/177490 co-relation queries the response was YES. Maximal size of possible extension queue 1714. Compared 339536 event pairs, 1422 based on Foata normal form. 2096/47495 useless extension candidates. Maximal degree in co-relation 167222. Up to 8355 conditions per place. [2024-11-28 03:33:46,017 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 791 selfloop transitions, 390 changer transitions 2/1196 dead transitions. [2024-11-28 03:33:46,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 1196 transitions, 9747 flow [2024-11-28 03:33:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-28 03:33:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2024-11-28 03:33:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 1515 transitions. [2024-11-28 03:33:46,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44143356643356646 [2024-11-28 03:33:46,024 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 725 flow. Second operand 78 states and 1515 transitions. [2024-11-28 03:33:46,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 1196 transitions, 9747 flow [2024-11-28 03:33:46,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1196 transitions, 9644 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-11-28 03:33:46,744 INFO L231 Difference]: Finished difference. Result has 206 places, 508 transitions, 6448 flow [2024-11-28 03:33:46,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=6448, PETRI_PLACES=206, PETRI_TRANSITIONS=508} [2024-11-28 03:33:46,745 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-11-28 03:33:46,745 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 508 transitions, 6448 flow [2024-11-28 03:33:46,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 10.268292682926829) internal successors, (421), 41 states have internal predecessors, (421), 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 03:33:46,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:33:46,746 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:46,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:33:46,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:46,947 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:33:46,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:46,947 INFO L85 PathProgramCache]: Analyzing trace with hash -677014219, now seen corresponding path program 5 times [2024-11-28 03:33:46,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:46,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860576787] [2024-11-28 03:33:46,947 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:33:46,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:47,035 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:33:47,035 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:48,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860576787] [2024-11-28 03:33:48,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860576787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:33:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243027442] [2024-11-28 03:33:48,907 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:33:48,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:33:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:48,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:33:48,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:33:49,034 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:33:49,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:33:49,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:33:49,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:49,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:33:49,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2024-11-28 03:33:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:33:49,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:33:50,168 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-11-28 03:33:50,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 101 [2024-11-28 03:33:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:33:50,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243027442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:33:50,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:33:50,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 35 [2024-11-28 03:33:50,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822979141] [2024-11-28 03:33:50,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:33:50,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:33:50,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:50,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:33:50,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:33:51,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 03:33:51,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 508 transitions, 6448 flow. Second operand has 36 states, 36 states have (on average 9.63888888888889) internal successors, (347), 36 states have internal predecessors, (347), 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 03:33:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:33:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 03:33:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:34:18,146 INFO L124 PetriNetUnfolderBase]: 54799/84954 cut-off events. [2024-11-28 03:34:18,146 INFO L125 PetriNetUnfolderBase]: For 3949961/3950090 co-relation queries the response was YES. [2024-11-28 03:34:19,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557931 conditions, 84954 events. 54799/84954 cut-off events. For 3949961/3950090 co-relation queries the response was YES. Maximal size of possible extension queue 2795. Compared 662903 event pairs, 1801 based on Foata normal form. 1118/85972 useless extension candidates. Maximal degree in co-relation 557857. Up to 14705 conditions per place. [2024-11-28 03:34:19,552 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 918 selfloop transitions, 726 changer transitions 2/1654 dead transitions. [2024-11-28 03:34:19,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1654 transitions, 23563 flow [2024-11-28 03:34:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-28 03:34:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-11-28 03:34:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 1237 transitions. [2024-11-28 03:34:19,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4259641873278237 [2024-11-28 03:34:19,558 INFO L175 Difference]: Start difference. First operand has 206 places, 508 transitions, 6448 flow. Second operand 66 states and 1237 transitions. [2024-11-28 03:34:19,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1654 transitions, 23563 flow [2024-11-28 03:34:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1654 transitions, 22082 flow, removed 729 selfloop flow, removed 5 redundant places. [2024-11-28 03:34:49,840 INFO L231 Difference]: Finished difference. Result has 303 places, 936 transitions, 13565 flow [2024-11-28 03:34:49,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5475, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=13565, PETRI_PLACES=303, PETRI_TRANSITIONS=936} [2024-11-28 03:34:49,841 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-11-28 03:34:49,841 INFO L471 AbstractCegarLoop]: Abstraction has has 303 places, 936 transitions, 13565 flow [2024-11-28 03:34:49,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.63888888888889) internal successors, (347), 36 states have internal predecessors, (347), 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 03:34:49,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:34:49,841 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:34:49,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:34:50,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:34:50,042 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:34:50,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:34:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1564554197, now seen corresponding path program 6 times [2024-11-28 03:34:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:34:50,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661630097] [2024-11-28 03:34:50,043 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:34:50,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:34:50,080 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:34:50,081 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:34:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:34:52,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:34:52,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661630097] [2024-11-28 03:34:52,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661630097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:34:52,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427230139] [2024-11-28 03:34:52,694 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:34:52,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:34:52,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:34:52,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:34:52,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bec40c6a-03fb-4f92-b19e-5ca8772ffd29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:34:52,827 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:34:52,827 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:34:52,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 03:34:52,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:34:53,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:34:53,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2024-11-28 03:34:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:34:53,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:34:58,059 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-11-28 03:34:58,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 101 [2024-11-28 03:34:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:34:58,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427230139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:34:58,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:34:58,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 36 [2024-11-28 03:34:58,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102673448] [2024-11-28 03:34:58,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:34:58,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 03:34:58,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:34:58,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 03:34:58,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:34:59,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-28 03:34:59,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 936 transitions, 13565 flow. Second operand has 37 states, 37 states have (on average 10.432432432432432) internal successors, (386), 37 states have internal predecessors, (386), 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 03:34:59,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:34:59,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-28 03:34:59,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:35:06,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:35:13,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:35:14,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:35:20,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:35:25,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]