./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.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_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/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_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/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_950d811f-210f-457a-b574-3adddd6e286e/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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:51:41,480 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:51:41,546 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:51:41,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:51:41,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:51:41,582 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:51:41,583 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:51:41,583 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:51:41,583 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:51:41,583 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:51:41,583 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:51:41,584 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:51:41,584 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:51:41,584 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:51:41,584 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:51:41,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:51:41,584 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:51:41,585 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:51:41,586 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:51:41,586 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:51:41,586 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:51:41,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:51:41,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:51:41,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:51:41,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:41,586 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:51:41,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:51:41,587 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:51:41,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:51:41,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:41,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:51:41,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:51:41,587 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:51:41,587 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:51:41,587 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:51:41,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:51:41,588 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:51:41,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:51:41,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:51:41,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:51:41,588 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_950d811f-210f-457a-b574-3adddd6e286e/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 -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2024-11-27 19:51:41,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:51:41,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:51:41,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:51:41,910 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:51:41,911 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:51:41,912 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-11-27 19:51:44,793 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/data/e48a52174/f82b74ee7c6c45b1a8b7b15610b83b9e/FLAG17f9e5fec [2024-11-27 19:51:45,123 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:51:45,127 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-11-27 19:51:45,142 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/data/e48a52174/f82b74ee7c6c45b1a8b7b15610b83b9e/FLAG17f9e5fec [2024-11-27 19:51:45,369 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/data/e48a52174/f82b74ee7c6c45b1a8b7b15610b83b9e [2024-11-27 19:51:45,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:51:45,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:51:45,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:51:45,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:51:45,383 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:51:45,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a86b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45, skipping insertion in model container [2024-11-27 19:51:45,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,410 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:51:45,607 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_950d811f-210f-457a-b574-3adddd6e286e/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2024-11-27 19:51:45,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:51:45,624 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:51:45,645 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_950d811f-210f-457a-b574-3adddd6e286e/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2024-11-27 19:51:45,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:51:45,665 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:51:45,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45 WrapperNode [2024-11-27 19:51:45,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:51:45,667 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:51:45,667 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:51:45,667 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:51:45,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,701 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 86 [2024-11-27 19:51:45,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:51:45,702 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:51:45,702 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:51:45,703 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:51:45,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,714 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,728 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 19:51:45,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,728 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,738 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:51:45,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:51:45,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:51:45,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:51:45,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (1/1) ... [2024-11-27 19:51:45,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:45,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:45,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:51:45,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:51:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:51:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 19:51:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 19:51:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 19:51:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 19:51:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 19:51:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 19:51:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:51:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:51:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:51:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:51:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 19:51:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 19:51:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 19:51:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:51:45,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:51:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:51:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:51:45,818 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:51:45,933 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:51:45,935 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:51:46,216 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:51:46,216 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:51:46,533 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:51:46,534 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 19:51:46,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:46 BoogieIcfgContainer [2024-11-27 19:51:46,535 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:51:46,538 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:51:46,538 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:51:46,545 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:51:46,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:51:45" (1/3) ... [2024-11-27 19:51:46,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:46, skipping insertion in model container [2024-11-27 19:51:46,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:45" (2/3) ... [2024-11-27 19:51:46,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:46, skipping insertion in model container [2024-11-27 19:51:46,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:46" (3/3) ... [2024-11-27 19:51:46,548 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2024-11-27 19:51:46,564 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:51:46,568 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-min-array-hom.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-27 19:51:46,568 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:51:46,668 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 19:51:46,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2024-11-27 19:51:46,756 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-11-27 19:51:46,760 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 19:51:46,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-27 19:51:46,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2024-11-27 19:51:46,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2024-11-27 19:51:46,782 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:51:46,799 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;@1a5c372e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:51:46,799 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 19:51:46,818 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:51:46,818 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-27 19:51:46,818 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 19:51:46,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:46,819 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:46,820 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:46,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash -212175932, now seen corresponding path program 1 times [2024-11-27 19:51:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:46,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414925559] [2024-11-27 19:51:46,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:46,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:47,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414925559] [2024-11-27 19:51:47,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414925559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:47,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:47,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:51:47,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274427850] [2024-11-27 19:51:47,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:47,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:47,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:47,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:47,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:47,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-27 19:51:47,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:47,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:47,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-27 19:51:47,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:47,788 INFO L124 PetriNetUnfolderBase]: 617/947 cut-off events. [2024-11-27 19:51:47,789 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-27 19:51:47,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 947 events. 617/947 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3765 event pairs, 126 based on Foata normal form. 1/934 useless extension candidates. Maximal degree in co-relation 1708. Up to 677 conditions per place. [2024-11-27 19:51:47,804 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-11-27 19:51:47,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2024-11-27 19:51:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:51:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-27 19:51:47,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-27 19:51:47,826 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2024-11-27 19:51:47,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2024-11-27 19:51:47,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 19:51:47,837 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2024-11-27 19:51:47,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-11-27 19:51:47,843 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-11-27 19:51:47,843 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2024-11-27 19:51:47,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:47,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:47,843 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:47,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:51:47,844 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:47,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1399592055, now seen corresponding path program 1 times [2024-11-27 19:51:47,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:47,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797779452] [2024-11-27 19:51:47,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:51:48,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797779452] [2024-11-27 19:51:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797779452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:51:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756696510] [2024-11-27 19:51:48,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:48,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:51:48,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:48,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:51:48,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:51:48,145 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-27 19:51:48,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:48,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:48,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-27 19:51:48,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:48,373 INFO L124 PetriNetUnfolderBase]: 617/943 cut-off events. [2024-11-27 19:51:48,373 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-27 19:51:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 943 events. 617/943 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3833 event pairs, 407 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 802. Up to 895 conditions per place. [2024-11-27 19:51:48,382 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 27 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-11-27 19:51:48,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 150 flow [2024-11-27 19:51:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:51:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:51:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-27 19:51:48,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-11-27 19:51:48,384 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 3 states and 48 transitions. [2024-11-27 19:51:48,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 150 flow [2024-11-27 19:51:48,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:48,386 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 98 flow [2024-11-27 19:51:48,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-27 19:51:48,387 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-11-27 19:51:48,387 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 98 flow [2024-11-27 19:51:48,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:48,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:48,388 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:48,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:51:48,388 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:48,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1274343495, now seen corresponding path program 1 times [2024-11-27 19:51:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:48,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969816582] [2024-11-27 19:51:48,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:51:48,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969816582] [2024-11-27 19:51:48,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969816582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:48,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:48,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:51:48,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531474235] [2024-11-27 19:51:48,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:48,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:51:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:48,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:51:48,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:51:48,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-27 19:51:48,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:48,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:48,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-27 19:51:48,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:48,945 INFO L124 PetriNetUnfolderBase]: 790/1159 cut-off events. [2024-11-27 19:51:48,945 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2024-11-27 19:51:48,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2573 conditions, 1159 events. 790/1159 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4602 event pairs, 246 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 2560. Up to 576 conditions per place. [2024-11-27 19:51:48,955 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-27 19:51:48,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 224 flow [2024-11-27 19:51:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:51:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:51:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-11-27 19:51:48,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-27 19:51:48,957 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 98 flow. Second operand 4 states and 63 transitions. [2024-11-27 19:51:48,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 224 flow [2024-11-27 19:51:48,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 218 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-27 19:51:48,960 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 113 flow [2024-11-27 19:51:48,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-27 19:51:48,961 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-27 19:51:48,961 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 113 flow [2024-11-27 19:51:48,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:48,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:48,962 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:48,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:51:48,962 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:48,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1132907319, now seen corresponding path program 1 times [2024-11-27 19:51:48,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:48,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295811588] [2024-11-27 19:51:48,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:48,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:51:49,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295811588] [2024-11-27 19:51:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295811588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483753097] [2024-11-27 19:51:49,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:49,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:49,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:49,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:49,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:51:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:49,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 19:51:49,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:51:49,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:51:49,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483753097] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:49,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:51:49,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-27 19:51:49,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26306332] [2024-11-27 19:51:49,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:49,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:51:49,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:49,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:51:49,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:51:49,485 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-27 19:51:49,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:49,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:49,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-27 19:51:49,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:49,782 INFO L124 PetriNetUnfolderBase]: 850/1295 cut-off events. [2024-11-27 19:51:49,782 INFO L125 PetriNetUnfolderBase]: For 486/486 co-relation queries the response was YES. [2024-11-27 19:51:49,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1295 events. 850/1295 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5464 event pairs, 256 based on Foata normal form. 0/1243 useless extension candidates. Maximal degree in co-relation 3207. Up to 670 conditions per place. [2024-11-27 19:51:49,793 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 41 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-11-27 19:51:49,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 257 flow [2024-11-27 19:51:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:51:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:51:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-11-27 19:51:49,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-27 19:51:49,798 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 113 flow. Second operand 5 states and 72 transitions. [2024-11-27 19:51:49,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 257 flow [2024-11-27 19:51:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:51:49,803 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 132 flow [2024-11-27 19:51:49,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-11-27 19:51:49,805 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-11-27 19:51:49,805 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 132 flow [2024-11-27 19:51:49,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:49,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:49,807 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:49,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:50,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:50,011 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:51:50,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1269434354, now seen corresponding path program 1 times [2024-11-27 19:51:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:50,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564509879] [2024-11-27 19:51:50,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:51,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:51,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564509879] [2024-11-27 19:51:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564509879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:51,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313064336] [2024-11-27 19:51:51,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:51,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:51,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:51,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:51:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:51,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 19:51:51,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:51,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:51:51,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-11-27 19:51:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:52,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:55,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2024-11-27 19:51:55,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:51:55,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2024-11-27 19:52:27,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-11-27 19:52:27,352 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-11-27 19:52:27,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 1 [2024-11-27 19:52:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:27,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313064336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:27,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:27,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-27 19:52:27,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147949113] [2024-11-27 19:52:27,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:27,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 19:52:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:27,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 19:52:27,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-27 19:52:27,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-27 19:52:27,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 132 flow. Second operand has 24 states, 24 states have (on average 8.958333333333334) internal successors, (215), 24 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:27,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:27,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-27 19:52:27,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:30,845 INFO L124 PetriNetUnfolderBase]: 1841/2767 cut-off events. [2024-11-27 19:52:30,845 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2024-11-27 19:52:30,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7675 conditions, 2767 events. 1841/2767 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12770 event pairs, 98 based on Foata normal form. 1/2767 useless extension candidates. Maximal degree in co-relation 5619. Up to 1375 conditions per place. [2024-11-27 19:52:30,865 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 137 selfloop transitions, 57 changer transitions 1/199 dead transitions. [2024-11-27 19:52:30,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 199 transitions, 1067 flow [2024-11-27 19:52:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 19:52:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-27 19:52:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 321 transitions. [2024-11-27 19:52:30,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-11-27 19:52:30,868 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 132 flow. Second operand 21 states and 321 transitions. [2024-11-27 19:52:30,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 199 transitions, 1067 flow [2024-11-27 19:52:30,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 199 transitions, 1050 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:52:30,880 INFO L231 Difference]: Finished difference. Result has 64 places, 91 transitions, 543 flow [2024-11-27 19:52:30,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=543, PETRI_PLACES=64, PETRI_TRANSITIONS=91} [2024-11-27 19:52:30,882 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 29 predicate places. [2024-11-27 19:52:30,883 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 91 transitions, 543 flow [2024-11-27 19:52:30,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.958333333333334) internal successors, (215), 24 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:30,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:30,885 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:30,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:31,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:31,090 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:52:31,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash -78465058, now seen corresponding path program 2 times [2024-11-27 19:52:31,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:31,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243017371] [2024-11-27 19:52:31,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:52:31,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:31,135 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:52:31,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:52:31,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243017371] [2024-11-27 19:52:31,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243017371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:31,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411942132] [2024-11-27 19:52:31,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:52:31,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:31,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:31,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:31,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:52:31,928 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:52:31,928 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:31,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 19:52:31,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:31,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:52:32,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2024-11-27 19:52:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:32,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:34,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2024-11-27 19:52:34,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:52:34,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-11-27 19:53:16,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2024-11-27 19:53:16,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:53:16,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2024-11-27 19:53:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:25,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411942132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:25,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:53:25,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2024-11-27 19:53:25,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672758900] [2024-11-27 19:53:25,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:25,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 19:53:25,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:25,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 19:53:25,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:53:25,218 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-27 19:53:25,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 91 transitions, 543 flow. Second operand has 22 states, 22 states have (on average 10.0) internal successors, (220), 22 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:25,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:25,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-27 19:53:25,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:28,014 INFO L124 PetriNetUnfolderBase]: 2050/3329 cut-off events. [2024-11-27 19:53:28,014 INFO L125 PetriNetUnfolderBase]: For 4820/4820 co-relation queries the response was YES. [2024-11-27 19:53:28,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10784 conditions, 3329 events. 2050/3329 cut-off events. For 4820/4820 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18021 event pairs, 122 based on Foata normal form. 3/3332 useless extension candidates. Maximal degree in co-relation 10222. Up to 1815 conditions per place. [2024-11-27 19:53:28,038 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 193 selfloop transitions, 121 changer transitions 2/322 dead transitions. [2024-11-27 19:53:28,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 322 transitions, 2167 flow [2024-11-27 19:53:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-27 19:53:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-27 19:53:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 474 transitions. [2024-11-27 19:53:28,042 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4633431085043988 [2024-11-27 19:53:28,042 INFO L175 Difference]: Start difference. First operand has 64 places, 91 transitions, 543 flow. Second operand 31 states and 474 transitions. [2024-11-27 19:53:28,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 322 transitions, 2167 flow [2024-11-27 19:53:28,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 322 transitions, 1959 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-11-27 19:53:28,059 INFO L231 Difference]: Finished difference. Result has 105 places, 182 transitions, 1307 flow [2024-11-27 19:53:28,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1307, PETRI_PLACES=105, PETRI_TRANSITIONS=182} [2024-11-27 19:53:28,060 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2024-11-27 19:53:28,060 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 182 transitions, 1307 flow [2024-11-27 19:53:28,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.0) internal successors, (220), 22 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:28,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:53:28,060 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:28,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:53:28,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 19:53:28,265 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:53:28,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1913320458, now seen corresponding path program 3 times [2024-11-27 19:53:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:28,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088274465] [2024-11-27 19:53:28,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:53:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:28,313 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:53:28,313 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:53:28,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:28,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088274465] [2024-11-27 19:53:28,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088274465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:28,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056650993] [2024-11-27 19:53:28,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:53:28,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:28,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:28,986 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:28,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:53:29,062 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:53:29,062 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:29,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 19:53:29,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:29,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-11-27 19:53:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:29,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:29,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:53:29,709 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 123 treesize of output 75 [2024-11-27 19:53:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:30,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056650993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:30,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:53:30,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2024-11-27 19:53:30,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415391962] [2024-11-27 19:53:30,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:30,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 19:53:30,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:30,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 19:53:30,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2024-11-27 19:53:30,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-27 19:53:30,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 182 transitions, 1307 flow. Second operand has 24 states, 24 states have (on average 9.75) internal successors, (234), 24 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:30,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:30,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-27 19:53:30,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:31,855 INFO L124 PetriNetUnfolderBase]: 2811/4570 cut-off events. [2024-11-27 19:53:31,855 INFO L125 PetriNetUnfolderBase]: For 13839/13861 co-relation queries the response was YES. [2024-11-27 19:53:31,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17897 conditions, 4570 events. 2811/4570 cut-off events. For 13839/13861 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26739 event pairs, 388 based on Foata normal form. 24/4594 useless extension candidates. Maximal degree in co-relation 17315. Up to 3088 conditions per place. [2024-11-27 19:53:31,905 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 226 selfloop transitions, 109 changer transitions 1/342 dead transitions. [2024-11-27 19:53:31,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 342 transitions, 2909 flow [2024-11-27 19:53:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 19:53:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-27 19:53:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 360 transitions. [2024-11-27 19:53:31,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-27 19:53:31,908 INFO L175 Difference]: Start difference. First operand has 105 places, 182 transitions, 1307 flow. Second operand 25 states and 360 transitions. [2024-11-27 19:53:31,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 342 transitions, 2909 flow [2024-11-27 19:53:31,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 342 transitions, 2782 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-11-27 19:53:31,961 INFO L231 Difference]: Finished difference. Result has 134 places, 248 transitions, 1999 flow [2024-11-27 19:53:31,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1999, PETRI_PLACES=134, PETRI_TRANSITIONS=248} [2024-11-27 19:53:31,962 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 99 predicate places. [2024-11-27 19:53:31,962 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 248 transitions, 1999 flow [2024-11-27 19:53:31,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.75) internal successors, (234), 24 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:31,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:53:31,963 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:31,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 19:53:32,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 19:53:32,163 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:53:32,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1110069672, now seen corresponding path program 4 times [2024-11-27 19:53:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:32,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537558065] [2024-11-27 19:53:32,164 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:53:32,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:32,185 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:53:32,185 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:53:32,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:32,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537558065] [2024-11-27 19:53:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537558065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299324339] [2024-11-27 19:53:32,836 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:53:32,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:32,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:32,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:53:32,924 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:53:32,924 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:32,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 19:53:32,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:33,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-11-27 19:53:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:53:33,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:33,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:53:33,627 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 125 treesize of output 77 [2024-11-27 19:53:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:53:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299324339] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:34,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:53:34,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-11-27 19:53:34,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465242052] [2024-11-27 19:53:34,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:34,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 19:53:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:34,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 19:53:34,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2024-11-27 19:53:34,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-27 19:53:34,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 248 transitions, 1999 flow. Second operand has 25 states, 25 states have (on average 8.52) internal successors, (213), 25 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:34,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:34,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-27 19:53:34,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:35,368 INFO L124 PetriNetUnfolderBase]: 4447/6957 cut-off events. [2024-11-27 19:53:35,368 INFO L125 PetriNetUnfolderBase]: For 23848/23860 co-relation queries the response was YES. [2024-11-27 19:53:35,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28993 conditions, 6957 events. 4447/6957 cut-off events. For 23848/23860 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41578 event pairs, 649 based on Foata normal form. 14/6969 useless extension candidates. Maximal degree in co-relation 28113. Up to 5175 conditions per place. [2024-11-27 19:53:35,440 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 271 selfloop transitions, 195 changer transitions 1/472 dead transitions. [2024-11-27 19:53:35,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 472 transitions, 4626 flow [2024-11-27 19:53:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 19:53:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 19:53:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 192 transitions. [2024-11-27 19:53:35,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-11-27 19:53:35,442 INFO L175 Difference]: Start difference. First operand has 134 places, 248 transitions, 1999 flow. Second operand 15 states and 192 transitions. [2024-11-27 19:53:35,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 472 transitions, 4626 flow [2024-11-27 19:53:35,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 472 transitions, 4438 flow, removed 36 selfloop flow, removed 12 redundant places. [2024-11-27 19:53:35,567 INFO L231 Difference]: Finished difference. Result has 145 places, 392 transitions, 3897 flow [2024-11-27 19:53:35,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3897, PETRI_PLACES=145, PETRI_TRANSITIONS=392} [2024-11-27 19:53:35,570 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 110 predicate places. [2024-11-27 19:53:35,571 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 392 transitions, 3897 flow [2024-11-27 19:53:35,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.52) internal successors, (213), 25 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:35,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:53:35,572 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:35,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:53:35,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:35,773 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:53:35,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1827224172, now seen corresponding path program 5 times [2024-11-27 19:53:35,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:35,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021269847] [2024-11-27 19:53:35,773 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:53:35,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:35,802 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:53:35,803 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:36,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:36,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021269847] [2024-11-27 19:53:36,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021269847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:36,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425152600] [2024-11-27 19:53:36,712 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:53:36,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:36,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:36,714 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:36,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:53:36,794 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:53:36,794 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:36,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 19:53:36,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:36,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:53:37,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-11-27 19:53:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:37,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:40,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 167 [2024-11-27 19:53:40,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:53:40,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 219 [2024-11-27 19:53:46,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-11-27 19:53:46,781 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 19:53:46,782 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 125 treesize of output 115 [2024-11-27 19:53:47,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-11-27 19:53:47,058 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-27 19:53:47,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-11-27 19:53:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:47,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425152600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:47,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:53:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2024-11-27 19:53:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618093033] [2024-11-27 19:53:47,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:47,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 19:53:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:47,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 19:53:47,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-27 19:53:47,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-27 19:53:47,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 392 transitions, 3897 flow. Second operand has 28 states, 28 states have (on average 7.678571428571429) internal successors, (215), 28 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:47,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:47,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-27 19:53:47,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:54,161 INFO L124 PetriNetUnfolderBase]: 9432/13606 cut-off events. [2024-11-27 19:53:54,161 INFO L125 PetriNetUnfolderBase]: For 60341/61001 co-relation queries the response was YES. [2024-11-27 19:53:54,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62914 conditions, 13606 events. 9432/13606 cut-off events. For 60341/61001 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 77141 event pairs, 848 based on Foata normal form. 560/14114 useless extension candidates. Maximal degree in co-relation 61604. Up to 7530 conditions per place. [2024-11-27 19:53:54,486 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 375 selfloop transitions, 463 changer transitions 2/843 dead transitions. [2024-11-27 19:53:54,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 843 transitions, 9282 flow [2024-11-27 19:53:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-27 19:53:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-27 19:53:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 521 transitions. [2024-11-27 19:53:54,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4154704944178628 [2024-11-27 19:53:54,489 INFO L175 Difference]: Start difference. First operand has 145 places, 392 transitions, 3897 flow. Second operand 38 states and 521 transitions. [2024-11-27 19:53:54,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 843 transitions, 9282 flow [2024-11-27 19:53:54,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 843 transitions, 9010 flow, removed 111 selfloop flow, removed 2 redundant places. [2024-11-27 19:53:54,815 INFO L231 Difference]: Finished difference. Result has 194 places, 647 transitions, 8004 flow [2024-11-27 19:53:54,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3778, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8004, PETRI_PLACES=194, PETRI_TRANSITIONS=647} [2024-11-27 19:53:54,817 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 159 predicate places. [2024-11-27 19:53:54,817 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 647 transitions, 8004 flow [2024-11-27 19:53:54,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.678571428571429) internal successors, (215), 28 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:54,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:53:54,818 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:54,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:53:55,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:55,019 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:53:55,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash 958867506, now seen corresponding path program 6 times [2024-11-27 19:53:55,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:55,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622386673] [2024-11-27 19:53:55,020 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:53:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:55,047 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:53:55,047 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:53:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622386673] [2024-11-27 19:53:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622386673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774965757] [2024-11-27 19:53:55,625 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:53:55,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:55,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:55,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:55,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:53:55,710 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:53:55,711 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:55,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 19:53:55,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:55,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:53:56,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-11-27 19:53:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:56,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:58,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2024-11-27 19:53:58,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:53:58,209 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 125 treesize of output 119 [2024-11-27 19:53:58,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 167 [2024-11-27 19:53:58,597 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-27 19:53:58,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 1 [2024-11-27 19:53:58,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2024-11-27 19:53:58,619 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-27 19:53:58,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-11-27 19:53:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:58,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774965757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:58,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:53:58,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-11-27 19:53:58,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581835356] [2024-11-27 19:53:58,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:58,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 19:53:58,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:58,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 19:53:58,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-27 19:53:58,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-27 19:53:58,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 647 transitions, 8004 flow. Second operand has 21 states, 21 states have (on average 9.857142857142858) internal successors, (207), 21 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:53:58,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:53:58,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-27 19:53:58,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:54:03,959 INFO L124 PetriNetUnfolderBase]: 7436/11532 cut-off events. [2024-11-27 19:54:03,959 INFO L125 PetriNetUnfolderBase]: For 93139/94090 co-relation queries the response was YES. [2024-11-27 19:54:04,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65033 conditions, 11532 events. 7436/11532 cut-off events. For 93139/94090 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 74231 event pairs, 355 based on Foata normal form. 736/12122 useless extension candidates. Maximal degree in co-relation 63872. Up to 4588 conditions per place. [2024-11-27 19:54:04,077 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 286 selfloop transitions, 714 changer transitions 2/1021 dead transitions. [2024-11-27 19:54:04,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1021 transitions, 13503 flow [2024-11-27 19:54:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-27 19:54:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-11-27 19:54:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 644 transitions. [2024-11-27 19:54:04,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45384073291050037 [2024-11-27 19:54:04,080 INFO L175 Difference]: Start difference. First operand has 194 places, 647 transitions, 8004 flow. Second operand 43 states and 644 transitions. [2024-11-27 19:54:04,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 1021 transitions, 13503 flow [2024-11-27 19:54:04,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1021 transitions, 13196 flow, removed 109 selfloop flow, removed 8 redundant places. [2024-11-27 19:54:04,664 INFO L231 Difference]: Finished difference. Result has 238 places, 836 transitions, 12198 flow [2024-11-27 19:54:04,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7729, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=12198, PETRI_PLACES=238, PETRI_TRANSITIONS=836} [2024-11-27 19:54:04,665 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 203 predicate places. [2024-11-27 19:54:04,665 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 836 transitions, 12198 flow [2024-11-27 19:54:04,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.857142857142858) internal successors, (207), 21 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:04,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:04,666 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:04,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:04,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:04,868 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:04,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:04,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2047420310, now seen corresponding path program 7 times [2024-11-27 19:54:04,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:04,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14418128] [2024-11-27 19:54:04,869 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:54:04,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:04,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:04,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14418128] [2024-11-27 19:54:04,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14418128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:04,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461973946] [2024-11-27 19:54:04,986 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:54:04,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:04,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:04,988 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:04,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:54:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:05,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:54:05,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:05,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:05,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461973946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:05,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:05,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 19:54:05,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104248766] [2024-11-27 19:54:05,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:05,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:54:05,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:05,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:54:05,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:54:05,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-27 19:54:05,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 836 transitions, 12198 flow. Second operand has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 14 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:05,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:05,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-27 19:54:05,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:54:08,832 INFO L124 PetriNetUnfolderBase]: 10517/15806 cut-off events. [2024-11-27 19:54:08,833 INFO L125 PetriNetUnfolderBase]: For 171138/172304 co-relation queries the response was YES. [2024-11-27 19:54:08,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98824 conditions, 15806 events. 10517/15806 cut-off events. For 171138/172304 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 101348 event pairs, 1687 based on Foata normal form. 874/16617 useless extension candidates. Maximal degree in co-relation 98731. Up to 5174 conditions per place. [2024-11-27 19:54:08,988 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 993 selfloop transitions, 80 changer transitions 0/1081 dead transitions. [2024-11-27 19:54:08,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1081 transitions, 17621 flow [2024-11-27 19:54:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:54:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 19:54:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-11-27 19:54:08,989 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-11-27 19:54:08,989 INFO L175 Difference]: Start difference. First operand has 238 places, 836 transitions, 12198 flow. Second operand 10 states and 171 transitions. [2024-11-27 19:54:08,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1081 transitions, 17621 flow [2024-11-27 19:54:09,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1081 transitions, 16722 flow, removed 351 selfloop flow, removed 17 redundant places. [2024-11-27 19:54:09,786 INFO L231 Difference]: Finished difference. Result has 232 places, 839 transitions, 11774 flow [2024-11-27 19:54:09,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11366, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11774, PETRI_PLACES=232, PETRI_TRANSITIONS=839} [2024-11-27 19:54:09,788 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 197 predicate places. [2024-11-27 19:54:09,788 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 839 transitions, 11774 flow [2024-11-27 19:54:09,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 14 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:09,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:09,788 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] [2024-11-27 19:54:09,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 19:54:09,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:09,988 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:09,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 692075949, now seen corresponding path program 8 times [2024-11-27 19:54:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:09,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8179037] [2024-11-27 19:54:09,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:10,010 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:10,011 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:10,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8179037] [2024-11-27 19:54:10,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8179037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:10,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283873912] [2024-11-27 19:54:10,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:10,121 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:10,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:54:10,201 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:10,201 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:10,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:54:10,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:10,333 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:54:10,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283873912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:10,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:54:10,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2024-11-27 19:54:10,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336504776] [2024-11-27 19:54:10,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:10,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 19:54:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:10,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 19:54:10,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:54:10,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-27 19:54:10,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 839 transitions, 11774 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:10,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:10,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-27 19:54:10,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:54:15,948 INFO L124 PetriNetUnfolderBase]: 15582/23442 cut-off events. [2024-11-27 19:54:15,948 INFO L125 PetriNetUnfolderBase]: For 279329/279493 co-relation queries the response was YES. [2024-11-27 19:54:16,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145937 conditions, 23442 events. 15582/23442 cut-off events. For 279329/279493 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 156774 event pairs, 3530 based on Foata normal form. 68/23492 useless extension candidates. Maximal degree in co-relation 144927. Up to 9703 conditions per place. [2024-11-27 19:54:16,174 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 1399 selfloop transitions, 91 changer transitions 0/1496 dead transitions. [2024-11-27 19:54:16,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 1496 transitions, 23825 flow [2024-11-27 19:54:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:54:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 19:54:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-11-27 19:54:16,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-11-27 19:54:16,176 INFO L175 Difference]: Start difference. First operand has 232 places, 839 transitions, 11774 flow. Second operand 12 states and 187 transitions. [2024-11-27 19:54:16,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 1496 transitions, 23825 flow [2024-11-27 19:54:17,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1496 transitions, 23612 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-11-27 19:54:17,931 INFO L231 Difference]: Finished difference. Result has 250 places, 895 transitions, 13017 flow [2024-11-27 19:54:17,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11731, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13017, PETRI_PLACES=250, PETRI_TRANSITIONS=895} [2024-11-27 19:54:17,932 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 215 predicate places. [2024-11-27 19:54:17,932 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 895 transitions, 13017 flow [2024-11-27 19:54:17,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:17,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:17,933 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] [2024-11-27 19:54:17,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:18,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:18,133 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:18,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:18,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1939550809, now seen corresponding path program 9 times [2024-11-27 19:54:18,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:18,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216564649] [2024-11-27 19:54:18,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:54:18,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:18,153 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:54:18,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:18,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:18,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216564649] [2024-11-27 19:54:18,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216564649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:18,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289252913] [2024-11-27 19:54:18,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:54:18,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:18,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:18,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:18,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:54:18,358 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:54:18,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:18,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:54:18,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:18,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:18,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289252913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:18,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:18,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 19:54:18,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004346854] [2024-11-27 19:54:18,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:18,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:54:18,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:18,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:54:18,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:54:18,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-27 19:54:18,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 895 transitions, 13017 flow. Second operand has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:18,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:18,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-27 19:54:18,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:54:22,704 INFO L124 PetriNetUnfolderBase]: 11342/17706 cut-off events. [2024-11-27 19:54:22,704 INFO L125 PetriNetUnfolderBase]: For 240057/240717 co-relation queries the response was YES. [2024-11-27 19:54:22,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117669 conditions, 17706 events. 11342/17706 cut-off events. For 240057/240717 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 121034 event pairs, 3968 based on Foata normal form. 968/18607 useless extension candidates. Maximal degree in co-relation 116544. Up to 7851 conditions per place. [2024-11-27 19:54:22,897 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 826 selfloop transitions, 81 changer transitions 0/915 dead transitions. [2024-11-27 19:54:22,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 915 transitions, 14758 flow [2024-11-27 19:54:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:54:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:54:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-11-27 19:54:22,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-27 19:54:22,898 INFO L175 Difference]: Start difference. First operand has 250 places, 895 transitions, 13017 flow. Second operand 7 states and 121 transitions. [2024-11-27 19:54:22,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 915 transitions, 14758 flow [2024-11-27 19:54:24,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 915 transitions, 14624 flow, removed 67 selfloop flow, removed 0 redundant places. [2024-11-27 19:54:24,501 INFO L231 Difference]: Finished difference. Result has 256 places, 743 transitions, 10855 flow [2024-11-27 19:54:24,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=10597, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10855, PETRI_PLACES=256, PETRI_TRANSITIONS=743} [2024-11-27 19:54:24,502 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 221 predicate places. [2024-11-27 19:54:24,502 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 743 transitions, 10855 flow [2024-11-27 19:54:24,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:24,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:24,503 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] [2024-11-27 19:54:24,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 19:54:24,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 19:54:24,703 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:24,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:24,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1007080040, now seen corresponding path program 1 times [2024-11-27 19:54:24,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:24,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470376865] [2024-11-27 19:54:24,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:24,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:24,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470376865] [2024-11-27 19:54:24,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470376865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:24,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520997585] [2024-11-27 19:54:24,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:24,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:24,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:24,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 19:54:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:24,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:54:24,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:24,939 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:25,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520997585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:25,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:25,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-27 19:54:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295965707] [2024-11-27 19:54:25,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:25,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 19:54:25,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:25,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 19:54:25,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-27 19:54:25,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-27 19:54:25,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 743 transitions, 10855 flow. Second operand has 13 states, 13 states have (on average 9.153846153846153) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:25,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:25,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-27 19:54:25,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:54:27,320 INFO L124 PetriNetUnfolderBase]: 7206/11467 cut-off events. [2024-11-27 19:54:27,320 INFO L125 PetriNetUnfolderBase]: For 169124/169789 co-relation queries the response was YES. [2024-11-27 19:54:27,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77837 conditions, 11467 events. 7206/11467 cut-off events. For 169124/169789 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 75800 event pairs, 3209 based on Foata normal form. 576/11938 useless extension candidates. Maximal degree in co-relation 77756. Up to 7227 conditions per place. [2024-11-27 19:54:27,432 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 545 selfloop transitions, 16 changer transitions 0/578 dead transitions. [2024-11-27 19:54:27,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 578 transitions, 9622 flow [2024-11-27 19:54:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:54:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:54:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-11-27 19:54:27,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-11-27 19:54:27,433 INFO L175 Difference]: Start difference. First operand has 256 places, 743 transitions, 10855 flow. Second operand 6 states and 98 transitions. [2024-11-27 19:54:27,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 578 transitions, 9622 flow [2024-11-27 19:54:28,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 578 transitions, 9299 flow, removed 76 selfloop flow, removed 15 redundant places. [2024-11-27 19:54:28,417 INFO L231 Difference]: Finished difference. Result has 232 places, 476 transitions, 6868 flow [2024-11-27 19:54:28,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6868, PETRI_PLACES=232, PETRI_TRANSITIONS=476} [2024-11-27 19:54:28,418 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 197 predicate places. [2024-11-27 19:54:28,418 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 476 transitions, 6868 flow [2024-11-27 19:54:28,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.153846153846153) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:28,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:28,418 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] [2024-11-27 19:54:28,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 19:54:28,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 19:54:28,619 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:28,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash 47631123, now seen corresponding path program 10 times [2024-11-27 19:54:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:28,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754630578] [2024-11-27 19:54:28,619 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:54:28,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:28,630 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:54:28,630 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:28,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:28,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754630578] [2024-11-27 19:54:28,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754630578] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:28,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:28,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 19:54:28,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194854599] [2024-11-27 19:54:28,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:28,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:54:28,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:28,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:54:28,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:54:28,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-27 19:54:28,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 476 transitions, 6868 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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) [2024-11-27 19:54:28,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:28,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-27 19:54:28,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:54:31,842 INFO L124 PetriNetUnfolderBase]: 10073/15161 cut-off events. [2024-11-27 19:54:31,842 INFO L125 PetriNetUnfolderBase]: For 177793/178323 co-relation queries the response was YES. [2024-11-27 19:54:31,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98587 conditions, 15161 events. 10073/15161 cut-off events. For 177793/178323 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 93881 event pairs, 1868 based on Foata normal form. 258/15402 useless extension candidates. Maximal degree in co-relation 98515. Up to 5708 conditions per place. [2024-11-27 19:54:31,985 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 475 selfloop transitions, 98 changer transitions 19/595 dead transitions. [2024-11-27 19:54:31,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 595 transitions, 9411 flow [2024-11-27 19:54:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 19:54:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 19:54:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-11-27 19:54:31,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2024-11-27 19:54:31,986 INFO L175 Difference]: Start difference. First operand has 232 places, 476 transitions, 6868 flow. Second operand 8 states and 133 transitions. [2024-11-27 19:54:31,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 595 transitions, 9411 flow [2024-11-27 19:54:33,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 595 transitions, 9356 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-27 19:54:33,022 INFO L231 Difference]: Finished difference. Result has 239 places, 476 transitions, 7057 flow [2024-11-27 19:54:33,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7057, PETRI_PLACES=239, PETRI_TRANSITIONS=476} [2024-11-27 19:54:33,022 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 204 predicate places. [2024-11-27 19:54:33,022 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 476 transitions, 7057 flow [2024-11-27 19:54:33,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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) [2024-11-27 19:54:33,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:33,023 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] [2024-11-27 19:54:33,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 19:54:33,023 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:33,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:33,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1043513657, now seen corresponding path program 11 times [2024-11-27 19:54:33,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:33,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49813524] [2024-11-27 19:54:33,023 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:54:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:33,036 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 19:54:33,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49813524] [2024-11-27 19:54:33,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49813524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361996445] [2024-11-27 19:54:33,252 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:54:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:33,254 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:33,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 19:54:33,335 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 19:54:33,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:33,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 19:54:33,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:33,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:54:33,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361996445] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:33,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:33,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 19:54:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725054567] [2024-11-27 19:54:33,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:33,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:54:33,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:33,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:54:33,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:54:33,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-27 19:54:33,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 476 transitions, 7057 flow. Second operand has 14 states, 14 states have (on average 9.357142857142858) internal successors, (131), 14 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:33,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:33,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-27 19:54:33,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:54:35,608 INFO L124 PetriNetUnfolderBase]: 7211/11133 cut-off events. [2024-11-27 19:54:35,608 INFO L125 PetriNetUnfolderBase]: For 156316/157485 co-relation queries the response was YES. [2024-11-27 19:54:35,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75748 conditions, 11133 events. 7211/11133 cut-off events. For 156316/157485 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 70291 event pairs, 3022 based on Foata normal form. 884/11876 useless extension candidates. Maximal degree in co-relation 75673. Up to 7938 conditions per place. [2024-11-27 19:54:35,762 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 279 selfloop transitions, 3 changer transitions 209/502 dead transitions. [2024-11-27 19:54:35,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 502 transitions, 8454 flow [2024-11-27 19:54:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:54:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:54:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-11-27 19:54:35,763 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-27 19:54:35,763 INFO L175 Difference]: Start difference. First operand has 239 places, 476 transitions, 7057 flow. Second operand 7 states and 110 transitions. [2024-11-27 19:54:35,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 502 transitions, 8454 flow [2024-11-27 19:54:36,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 502 transitions, 8182 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-27 19:54:36,874 INFO L231 Difference]: Finished difference. Result has 238 places, 293 transitions, 3937 flow [2024-11-27 19:54:36,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3937, PETRI_PLACES=238, PETRI_TRANSITIONS=293} [2024-11-27 19:54:36,875 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 203 predicate places. [2024-11-27 19:54:36,875 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 293 transitions, 3937 flow [2024-11-27 19:54:36,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.357142857142858) internal successors, (131), 14 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:36,875 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:36,875 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] [2024-11-27 19:54:36,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:37,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:37,076 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:37,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -776927639, now seen corresponding path program 12 times [2024-11-27 19:54:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:37,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243228633] [2024-11-27 19:54:37,076 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:54:37,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:37,089 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 19:54:37,090 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:54:37,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:37,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243228633] [2024-11-27 19:54:37,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243228633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:37,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731632117] [2024-11-27 19:54:37,188 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:54:37,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:37,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:37,190 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:37,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 19:54:37,276 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 19:54:37,276 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:37,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:54:37,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:54:37,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:54:37,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731632117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:37,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:37,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-27 19:54:37,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234189581] [2024-11-27 19:54:37,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:37,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 19:54:37,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:37,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 19:54:37,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-27 19:54:37,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-27 19:54:37,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 293 transitions, 3937 flow. Second operand has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 19 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:37,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:37,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-27 19:54:37,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:54:47,387 INFO L124 PetriNetUnfolderBase]: 24212/34258 cut-off events. [2024-11-27 19:54:47,387 INFO L125 PetriNetUnfolderBase]: For 356684/356684 co-relation queries the response was YES. [2024-11-27 19:54:47,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220590 conditions, 34258 events. 24212/34258 cut-off events. For 356684/356684 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 197523 event pairs, 385 based on Foata normal form. 58/34316 useless extension candidates. Maximal degree in co-relation 220516. Up to 13258 conditions per place. [2024-11-27 19:54:47,734 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 1626 selfloop transitions, 665 changer transitions 0/2292 dead transitions. [2024-11-27 19:54:47,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 2292 transitions, 30984 flow [2024-11-27 19:54:47,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-11-27 19:54:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2024-11-27 19:54:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 1685 transitions. [2024-11-27 19:54:47,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3897756187832524 [2024-11-27 19:54:47,738 INFO L175 Difference]: Start difference. First operand has 238 places, 293 transitions, 3937 flow. Second operand 131 states and 1685 transitions. [2024-11-27 19:54:47,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 2292 transitions, 30984 flow [2024-11-27 19:54:49,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 2292 transitions, 29577 flow, removed 615 selfloop flow, removed 28 redundant places. [2024-11-27 19:54:49,123 INFO L231 Difference]: Finished difference. Result has 356 places, 990 transitions, 12653 flow [2024-11-27 19:54:49,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=12653, PETRI_PLACES=356, PETRI_TRANSITIONS=990} [2024-11-27 19:54:49,123 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 321 predicate places. [2024-11-27 19:54:49,123 INFO L471 AbstractCegarLoop]: Abstraction has has 356 places, 990 transitions, 12653 flow [2024-11-27 19:54:49,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 19 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:49,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:54:49,124 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] [2024-11-27 19:54:49,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 19:54:49,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 19:54:49,324 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:54:49,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1161613115, now seen corresponding path program 13 times [2024-11-27 19:54:49,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:49,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719719146] [2024-11-27 19:54:49,325 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:54:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:54:49,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:49,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719719146] [2024-11-27 19:54:49,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719719146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:49,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557055725] [2024-11-27 19:54:49,665 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:54:49,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:49,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:49,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_950d811f-210f-457a-b574-3adddd6e286e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 19:54:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:49,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:54:49,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:54:49,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:54:49,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557055725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:49,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:49,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-27 19:54:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646683834] [2024-11-27 19:54:49,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:49,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 19:54:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:49,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 19:54:49,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-27 19:54:49,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-27 19:54:49,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 990 transitions, 12653 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:54:49,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:54:49,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-27 19:54:49,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand