./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i --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_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1 --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 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 15:30:23,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 15:30:23,462 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 15:30:23,467 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 15:30:23,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 15:30:23,488 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 15:30:23,489 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 15:30:23,489 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 15:30:23,489 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 15:30:23,489 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 15:30:23,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 15:30:23,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 15:30:23,490 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 15:30:23,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 15:30:23,490 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 15:30:23,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 15:30:23,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 15:30:23,490 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 15:30:23,491 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:30:23,491 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:30:23,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:30:23,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 15:30:23,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 15:30:23,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 15:30:23,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 15:30:23,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 15:30:23,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 15:30:23,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 15:30:23,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 15:30:23,493 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_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1 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 -> 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 [2024-12-02 15:30:23,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 15:30:23,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 15:30:23,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 15:30:23,733 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 15:30:23,734 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 15:30:23,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2024-12-02 15:30:26,372 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/data/832888cd6/84942a00793f41d29716a1ce948060ec/FLAG1a2c4bfe9 [2024-12-02 15:30:26,578 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 15:30:26,578 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2024-12-02 15:30:26,583 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/data/832888cd6/84942a00793f41d29716a1ce948060ec/FLAG1a2c4bfe9 [2024-12-02 15:30:26,958 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/data/832888cd6/84942a00793f41d29716a1ce948060ec [2024-12-02 15:30:26,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 15:30:26,961 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 15:30:26,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 15:30:26,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 15:30:26,967 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 15:30:26,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:30:26" (1/1) ... [2024-12-02 15:30:26,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1200bfda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:26, skipping insertion in model container [2024-12-02 15:30:26,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:30:26" (1/1) ... [2024-12-02 15:30:26,981 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 15:30:27,102 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_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2024-12-02 15:30:27,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:30:27,126 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 15:30:27,136 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_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2024-12-02 15:30:27,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 15:30:27,156 INFO L204 MainTranslator]: Completed translation [2024-12-02 15:30:27,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27 WrapperNode [2024-12-02 15:30:27,157 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 15:30:27,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 15:30:27,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 15:30:27,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 15:30:27,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,184 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-12-02 15:30:27,184 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 15:30:27,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 15:30:27,184 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 15:30:27,185 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 15:30:27,193 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,194 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,204 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-12-02 15:30:27,204 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,204 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,207 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,211 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 15:30:27,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 15:30:27,216 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 15:30:27,216 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 15:30:27,217 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (1/1) ... [2024-12-02 15:30:27,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 15:30:27,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:27,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 15:30:27,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 15:30:27,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 15:30:27,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 15:30:27,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 15:30:27,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 15:30:27,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 15:30:27,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 15:30:27,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 15:30:27,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 15:30:27,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 15:30:27,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 15:30:27,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 15:30:27,329 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 15:30:27,330 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 15:30:27,430 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-12-02 15:30:27,430 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 15:30:27,437 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 15:30:27,437 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-12-02 15:30:27,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:30:27 BoogieIcfgContainer [2024-12-02 15:30:27,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 15:30:27,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 15:30:27,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 15:30:27,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 15:30:27,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:30:26" (1/3) ... [2024-12-02 15:30:27,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168f82c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:30:27, skipping insertion in model container [2024-12-02 15:30:27,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:30:27" (2/3) ... [2024-12-02 15:30:27,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168f82c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:30:27, skipping insertion in model container [2024-12-02 15:30:27,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:30:27" (3/3) ... [2024-12-02 15:30:27,444 INFO L128 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2024-12-02 15:30:27,456 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 15:30:27,457 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_bubblesort_2_ground.i that has 1 procedures, 26 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-12-02 15:30:27,505 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 15:30:27,515 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;@1c20dfc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 15:30:27,516 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 15:30:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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) [2024-12-02 15:30:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 15:30:27,524 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:27,524 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:27,524 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:27,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:27,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1205302859, now seen corresponding path program 1 times [2024-12-02 15:30:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:27,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217340506] [2024-12-02 15:30:27,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:30:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:30:27,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:27,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217340506] [2024-12-02 15:30:27,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217340506] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:30:27,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 15:30:27,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 15:30:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081684266] [2024-12-02 15:30:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:30:27,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 15:30:27,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:27,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 15:30:27,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 15:30:27,704 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-12-02 15:30:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:27,732 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2024-12-02 15:30:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 15:30:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) Word has length 12 [2024-12-02 15:30:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:27,739 INFO L225 Difference]: With dead ends: 50 [2024-12-02 15:30:27,739 INFO L226 Difference]: Without dead ends: 24 [2024-12-02 15:30:27,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 15:30:27,743 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:27,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 15:30:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-12-02 15:30:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-12-02 15:30:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2024-12-02 15:30:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-12-02 15:30:27,764 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2024-12-02 15:30:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:27,765 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-12-02 15:30:27,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-12-02 15:30:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-12-02 15:30:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 15:30:27,765 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:27,766 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:27,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 15:30:27,766 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:27,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash -368722126, now seen corresponding path program 1 times [2024-12-02 15:30:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784315818] [2024-12-02 15:30:27,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:30:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 15:30:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784315818] [2024-12-02 15:30:27,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784315818] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483984663] [2024-12-02 15:30:27,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:30:27,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:27,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:27,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:27,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 15:30:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:27,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 15:30:27,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:30:27,933 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:30:27,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483984663] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:30:27,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 15:30:27,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-12-02 15:30:27,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908732466] [2024-12-02 15:30:27,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:30:27,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 15:30:27,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:27,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 15:30:27,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:30:27,935 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-12-02 15:30:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:27,954 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-12-02 15:30:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 15:30:27,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) Word has length 14 [2024-12-02 15:30:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:27,955 INFO L225 Difference]: With dead ends: 39 [2024-12-02 15:30:27,955 INFO L226 Difference]: Without dead ends: 29 [2024-12-02 15:30:27,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:30:27,956 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:27,956 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 15:30:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-02 15:30:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-12-02 15:30:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:30:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-12-02 15:30:27,961 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 14 [2024-12-02 15:30:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:27,961 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-12-02 15:30:27,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-12-02 15:30:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-12-02 15:30:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 15:30:27,962 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:27,962 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:27,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 15:30:28,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:28,163 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:28,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:28,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1959168573, now seen corresponding path program 1 times [2024-12-02 15:30:28,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:28,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021354803] [2024-12-02 15:30:28,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:30:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:30:28,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:28,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021354803] [2024-12-02 15:30:28,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021354803] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:28,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773565861] [2024-12-02 15:30:28,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:30:28,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:28,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:28,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:28,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 15:30:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:28,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 15:30:28,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 15:30:28,311 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 15:30:28,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773565861] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 15:30:28,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 15:30:28,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-12-02 15:30:28,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466366500] [2024-12-02 15:30:28,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 15:30:28,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 15:30:28,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:28,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 15:30:28,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:30:28,313 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2024-12-02 15:30:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:28,336 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-12-02 15:30:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 15:30:28,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) Word has length 18 [2024-12-02 15:30:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:28,337 INFO L225 Difference]: With dead ends: 57 [2024-12-02 15:30:28,337 INFO L226 Difference]: Without dead ends: 34 [2024-12-02 15:30:28,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 15:30:28,339 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:28,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 15:30:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-12-02 15:30:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-12-02 15:30:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 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) [2024-12-02 15:30:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-12-02 15:30:28,343 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2024-12-02 15:30:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:28,343 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-12-02 15:30:28,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2024-12-02 15:30:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-12-02 15:30:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 15:30:28,344 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:28,344 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:28,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 15:30:28,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:28,545 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:28,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:28,545 INFO L85 PathProgramCache]: Analyzing trace with hash -643840535, now seen corresponding path program 1 times [2024-12-02 15:30:28,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:28,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326973723] [2024-12-02 15:30:28,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:30:28,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 15:30:28,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:28,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326973723] [2024-12-02 15:30:28,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326973723] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:28,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506176887] [2024-12-02 15:30:28,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 15:30:28,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:28,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:28,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 15:30:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:28,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 15:30:28,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 15:30:28,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 15:30:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506176887] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:28,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-12-02 15:30:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886707265] [2024-12-02 15:30:28,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:28,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 15:30:28,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:28,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 15:30:28,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:30:28,702 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2024-12-02 15:30:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:28,729 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-12-02 15:30:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 15:30:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) Word has length 22 [2024-12-02 15:30:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:28,730 INFO L225 Difference]: With dead ends: 61 [2024-12-02 15:30:28,730 INFO L226 Difference]: Without dead ends: 36 [2024-12-02 15:30:28,730 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 15:30:28,731 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:28,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 15:30:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-12-02 15:30:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-12-02 15:30:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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) [2024-12-02 15:30:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-12-02 15:30:28,736 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 22 [2024-12-02 15:30:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:28,736 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-12-02 15:30:28,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2024-12-02 15:30:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-12-02 15:30:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 15:30:28,737 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:28,737 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:28,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 15:30:28,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:28,937 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:28,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2029353397, now seen corresponding path program 2 times [2024-12-02 15:30:28,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:28,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511892347] [2024-12-02 15:30:28,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:30:28,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:28,963 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:30:28,963 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 15:30:29,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:29,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511892347] [2024-12-02 15:30:29,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511892347] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954597150] [2024-12-02 15:30:29,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:30:29,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:29,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:29,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 15:30:29,081 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:30:29,081 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:29,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 15:30:29,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 15:30:29,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 15:30:29,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954597150] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:29,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:29,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-12-02 15:30:29,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308345789] [2024-12-02 15:30:29,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:29,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 15:30:29,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:29,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 15:30:29,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-12-02 15:30:29,220 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) [2024-12-02 15:30:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:29,319 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2024-12-02 15:30:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 15:30:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) Word has length 28 [2024-12-02 15:30:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:29,320 INFO L225 Difference]: With dead ends: 85 [2024-12-02 15:30:29,320 INFO L226 Difference]: Without dead ends: 60 [2024-12-02 15:30:29,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-12-02 15:30:29,321 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:29,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 165 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:30:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-12-02 15:30:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-12-02 15:30:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 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) [2024-12-02 15:30:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-12-02 15:30:29,328 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 28 [2024-12-02 15:30:29,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:29,328 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-12-02 15:30:29,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) [2024-12-02 15:30:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-12-02 15:30:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-12-02 15:30:29,329 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:29,329 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:29,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 15:30:29,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:29,530 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:29,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash -332299917, now seen corresponding path program 3 times [2024-12-02 15:30:29,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:29,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111175782] [2024-12-02 15:30:29,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:30:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:29,557 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 15:30:29,557 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:29,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111175782] [2024-12-02 15:30:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111175782] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:29,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994048081] [2024-12-02 15:30:29,615 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:30:29,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:29,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:29,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 15:30:29,687 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 15:30:29,687 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:29,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 15:30:29,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:29,726 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:29,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994048081] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:29,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:29,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-12-02 15:30:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693335375] [2024-12-02 15:30:29,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:29,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 15:30:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:29,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 15:30:29,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-12-02 15:30:29,770 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) [2024-12-02 15:30:29,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:29,821 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2024-12-02 15:30:29,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 15:30:29,822 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) Word has length 44 [2024-12-02 15:30:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:29,823 INFO L225 Difference]: With dead ends: 116 [2024-12-02 15:30:29,823 INFO L226 Difference]: Without dead ends: 86 [2024-12-02 15:30:29,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-12-02 15:30:29,824 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:29,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 15:30:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-12-02 15:30:29,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-12-02 15:30:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 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) [2024-12-02 15:30:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2024-12-02 15:30:29,832 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 44 [2024-12-02 15:30:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:29,832 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2024-12-02 15:30:29,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) [2024-12-02 15:30:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2024-12-02 15:30:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-12-02 15:30:29,834 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:29,834 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:29,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 15:30:30,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 15:30:30,034 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:30,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1289768971, now seen corresponding path program 4 times [2024-12-02 15:30:30,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:30,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213776643] [2024-12-02 15:30:30,035 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:30:30,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:30,067 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:30:30,068 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:30,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213776643] [2024-12-02 15:30:30,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213776643] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621919735] [2024-12-02 15:30:30,187 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:30:30,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:30,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:30,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:30,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 15:30:30,272 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:30:30,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:30,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 15:30:30,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:30,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:30,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621919735] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:30,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:30,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-12-02 15:30:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512541862] [2024-12-02 15:30:30,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:30,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 15:30:30,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:30,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 15:30:30,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-12-02 15:30:30,455 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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) [2024-12-02 15:30:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:30,548 INFO L93 Difference]: Finished difference Result 212 states and 275 transitions. [2024-12-02 15:30:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 15:30:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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) Word has length 60 [2024-12-02 15:30:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:30,550 INFO L225 Difference]: With dead ends: 212 [2024-12-02 15:30:30,550 INFO L226 Difference]: Without dead ends: 150 [2024-12-02 15:30:30,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-12-02 15:30:30,551 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:30,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 90 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:30:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-12-02 15:30:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-12-02 15:30:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.221476510067114) internal successors, (182), 149 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 15:30:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 182 transitions. [2024-12-02 15:30:30,563 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 182 transitions. Word has length 60 [2024-12-02 15:30:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:30,564 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 182 transitions. [2024-12-02 15:30:30,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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) [2024-12-02 15:30:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 182 transitions. [2024-12-02 15:30:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-12-02 15:30:30,565 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:30,565 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:30,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 15:30:30,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 15:30:30,766 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:30,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1591911109, now seen corresponding path program 5 times [2024-12-02 15:30:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:30,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529534764] [2024-12-02 15:30:30,767 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:30:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:30,878 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-12-02 15:30:30,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 1 proven. 378 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:31,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:31,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529534764] [2024-12-02 15:30:31,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529534764] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:31,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286529173] [2024-12-02 15:30:31,208 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:30:31,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:31,210 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:31,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 15:30:31,424 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-12-02 15:30:31,424 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:31,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 15:30:31,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 1 proven. 378 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:31,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 1 proven. 378 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 15:30:31,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286529173] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:31,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:31,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2024-12-02 15:30:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313480142] [2024-12-02 15:30:31,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:31,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 15:30:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:31,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 15:30:31,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2024-12-02 15:30:31,899 INFO L87 Difference]: Start difference. First operand 150 states and 182 transitions. Second operand has 32 states, 32 states have (on average 4.125) internal successors, (132), 32 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) [2024-12-02 15:30:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:32,088 INFO L93 Difference]: Finished difference Result 404 states and 531 transitions. [2024-12-02 15:30:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 15:30:32,088 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 32 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) Word has length 92 [2024-12-02 15:30:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:32,090 INFO L225 Difference]: With dead ends: 404 [2024-12-02 15:30:32,090 INFO L226 Difference]: Without dead ends: 278 [2024-12-02 15:30:32,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2024-12-02 15:30:32,091 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:32,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 142 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:30:32,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-12-02 15:30:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2024-12-02 15:30:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.2346570397111913) internal successors, (342), 277 states have internal predecessors, (342), 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) [2024-12-02 15:30:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 342 transitions. [2024-12-02 15:30:32,109 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 342 transitions. Word has length 92 [2024-12-02 15:30:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:32,109 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 342 transitions. [2024-12-02 15:30:32,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 32 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) [2024-12-02 15:30:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 342 transitions. [2024-12-02 15:30:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-12-02 15:30:32,112 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:32,112 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:32,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-12-02 15:30:32,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:32,313 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:32,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:32,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2020264037, now seen corresponding path program 6 times [2024-12-02 15:30:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832039548] [2024-12-02 15:30:32,313 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:30:32,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:32,502 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2024-12-02 15:30:32,502 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:32,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832039548] [2024-12-02 15:30:32,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832039548] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686549140] [2024-12-02 15:30:32,727 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 15:30:32,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:32,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:32,729 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:32,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 15:30:33,006 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2024-12-02 15:30:33,006 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:33,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 15:30:33,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:33,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:33,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686549140] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:33,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:33,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-12-02 15:30:33,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030524061] [2024-12-02 15:30:33,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:33,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 15:30:33,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:33,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 15:30:33,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-12-02 15:30:33,282 INFO L87 Difference]: Start difference. First operand 278 states and 342 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2024-12-02 15:30:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:33,366 INFO L93 Difference]: Finished difference Result 557 states and 696 transitions. [2024-12-02 15:30:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 15:30:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) Word has length 156 [2024-12-02 15:30:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:33,369 INFO L225 Difference]: With dead ends: 557 [2024-12-02 15:30:33,369 INFO L226 Difference]: Without dead ends: 302 [2024-12-02 15:30:33,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-12-02 15:30:33,370 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:33,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 113 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:30:33,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-12-02 15:30:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2024-12-02 15:30:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.2159468438538206) internal successors, (366), 301 states have internal predecessors, (366), 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) [2024-12-02 15:30:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 366 transitions. [2024-12-02 15:30:33,387 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 366 transitions. Word has length 156 [2024-12-02 15:30:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:33,387 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 366 transitions. [2024-12-02 15:30:33,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2024-12-02 15:30:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 366 transitions. [2024-12-02 15:30:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-12-02 15:30:33,390 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:33,390 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:33,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 15:30:33,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:33,591 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:33,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1841943349, now seen corresponding path program 7 times [2024-12-02 15:30:33,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:33,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521995302] [2024-12-02 15:30:33,592 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:30:33,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:34,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:34,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521995302] [2024-12-02 15:30:34,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521995302] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:34,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225460938] [2024-12-02 15:30:34,505 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 15:30:34,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:34,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:34,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:34,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 15:30:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 15:30:34,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 15:30:34,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:34,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:35,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225460938] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:35,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:35,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-12-02 15:30:35,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069594079] [2024-12-02 15:30:35,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:35,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 15:30:35,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:35,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 15:30:35,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 15:30:35,364 INFO L87 Difference]: Start difference. First operand 302 states and 366 transitions. Second operand has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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) [2024-12-02 15:30:35,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:35,486 INFO L93 Difference]: Finished difference Result 605 states and 756 transitions. [2024-12-02 15:30:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 15:30:35,487 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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) Word has length 180 [2024-12-02 15:30:35,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:35,489 INFO L225 Difference]: With dead ends: 605 [2024-12-02 15:30:35,489 INFO L226 Difference]: Without dead ends: 350 [2024-12-02 15:30:35,490 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 15:30:35,490 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:35,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 15:30:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-12-02 15:30:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2024-12-02 15:30:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.186246418338109) internal successors, (414), 349 states have internal predecessors, (414), 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) [2024-12-02 15:30:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 414 transitions. [2024-12-02 15:30:35,503 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 414 transitions. Word has length 180 [2024-12-02 15:30:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:35,503 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 414 transitions. [2024-12-02 15:30:35,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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) [2024-12-02 15:30:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 414 transitions. [2024-12-02 15:30:35,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-12-02 15:30:35,506 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:35,506 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:35,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 15:30:35,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 15:30:35,707 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:35,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1536792789, now seen corresponding path program 8 times [2024-12-02 15:30:35,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:35,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603833773] [2024-12-02 15:30:35,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:30:35,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:35,784 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:30:35,784 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:37,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:37,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603833773] [2024-12-02 15:30:37,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603833773] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:37,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141188402] [2024-12-02 15:30:37,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 15:30:37,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:37,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:37,745 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:37,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 15:30:37,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 15:30:37,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:37,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 15:30:37,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:38,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-12-02 15:30:40,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141188402] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:40,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:40,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-12-02 15:30:40,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598602680] [2024-12-02 15:30:40,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:40,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-12-02 15:30:40,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:40,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-12-02 15:30:40,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 15:30:40,289 INFO L87 Difference]: Start difference. First operand 350 states and 414 transitions. Second operand has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 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) [2024-12-02 15:30:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:40,557 INFO L93 Difference]: Finished difference Result 701 states and 876 transitions. [2024-12-02 15:30:40,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-12-02 15:30:40,557 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 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) Word has length 228 [2024-12-02 15:30:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:40,559 INFO L225 Difference]: With dead ends: 701 [2024-12-02 15:30:40,559 INFO L226 Difference]: Without dead ends: 446 [2024-12-02 15:30:40,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 15:30:40,562 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:40,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 179 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 15:30:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-12-02 15:30:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2024-12-02 15:30:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.146067415730337) internal successors, (510), 445 states have internal predecessors, (510), 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) [2024-12-02 15:30:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 510 transitions. [2024-12-02 15:30:40,571 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 510 transitions. Word has length 228 [2024-12-02 15:30:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:40,571 INFO L471 AbstractCegarLoop]: Abstraction has 446 states and 510 transitions. [2024-12-02 15:30:40,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 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) [2024-12-02 15:30:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 510 transitions. [2024-12-02 15:30:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2024-12-02 15:30:40,574 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:40,574 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:40,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 15:30:40,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:40,775 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:40,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:40,775 INFO L85 PathProgramCache]: Analyzing trace with hash -809493525, now seen corresponding path program 9 times [2024-12-02 15:30:40,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:40,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665149272] [2024-12-02 15:30:40,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:30:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:41,302 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-12-02 15:30:41,302 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10607 backedges. 1 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 15:30:42,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:42,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665149272] [2024-12-02 15:30:42,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665149272] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:42,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099279559] [2024-12-02 15:30:42,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 15:30:42,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:42,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:42,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:42,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 15:30:51,719 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-12-02 15:30:51,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:51,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 15:30:51,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10607 backedges. 1 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 15:30:51,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:30:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10607 backedges. 1 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 15:30:52,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099279559] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:30:52,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:30:52,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-12-02 15:30:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596194216] [2024-12-02 15:30:52,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:30:52,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-12-02 15:30:52,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:30:52,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-12-02 15:30:52,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 15:30:52,924 INFO L87 Difference]: Start difference. First operand 446 states and 510 transitions. Second operand has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 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) [2024-12-02 15:30:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:30:53,301 INFO L93 Difference]: Finished difference Result 956 states and 1211 transitions. [2024-12-02 15:30:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 15:30:53,302 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 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) Word has length 324 [2024-12-02 15:30:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:30:53,304 INFO L225 Difference]: With dead ends: 956 [2024-12-02 15:30:53,304 INFO L226 Difference]: Without dead ends: 702 [2024-12-02 15:30:53,305 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 15:30:53,306 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 15:30:53,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 156 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 15:30:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-12-02 15:30:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2024-12-02 15:30:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.1840228245363766) internal successors, (830), 701 states have internal predecessors, (830), 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) [2024-12-02 15:30:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 830 transitions. [2024-12-02 15:30:53,318 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 830 transitions. Word has length 324 [2024-12-02 15:30:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:30:53,318 INFO L471 AbstractCegarLoop]: Abstraction has 702 states and 830 transitions. [2024-12-02 15:30:53,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 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) [2024-12-02 15:30:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 830 transitions. [2024-12-02 15:30:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2024-12-02 15:30:53,323 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:30:53,323 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:30:53,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 15:30:53,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 15:30:53,524 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:30:53,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:30:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1039019861, now seen corresponding path program 10 times [2024-12-02 15:30:53,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:30:53,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588451425] [2024-12-02 15:30:53,524 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:30:53,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:30:53,797 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:30:53,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16463 backedges. 1 proven. 7626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 15:30:56,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:30:56,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588451425] [2024-12-02 15:30:56,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588451425] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:30:56,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73591139] [2024-12-02 15:30:56,656 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 15:30:56,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:30:56,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:30:56,657 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:30:56,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 15:30:56,982 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 15:30:56,982 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:30:56,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-12-02 15:30:56,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 15:30:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16463 backedges. 1 proven. 7626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 15:30:57,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 15:31:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16463 backedges. 1 proven. 7626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 15:31:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73591139] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 15:31:01,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 15:31:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 128 [2024-12-02 15:31:01,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581783445] [2024-12-02 15:31:01,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 15:31:01,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-12-02 15:31:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 15:31:01,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-12-02 15:31:01,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2024-12-02 15:31:01,107 INFO L87 Difference]: Start difference. First operand 702 states and 830 transitions. Second operand has 128 states, 128 states have (on average 4.03125) internal successors, (516), 128 states have internal predecessors, (516), 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) [2024-12-02 15:31:02,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 15:31:02,632 INFO L93 Difference]: Finished difference Result 1724 states and 2235 transitions. [2024-12-02 15:31:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-12-02 15:31:02,633 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 4.03125) internal successors, (516), 128 states have internal predecessors, (516), 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) Word has length 452 [2024-12-02 15:31:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 15:31:02,637 INFO L225 Difference]: With dead ends: 1724 [2024-12-02 15:31:02,637 INFO L226 Difference]: Without dead ends: 1214 [2024-12-02 15:31:02,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 841 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2024-12-02 15:31:02,641 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 524 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 15:31:02,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 220 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 15:31:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2024-12-02 15:31:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1214. [2024-12-02 15:31:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 1.211871393239901) internal successors, (1470), 1213 states have internal predecessors, (1470), 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) [2024-12-02 15:31:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1470 transitions. [2024-12-02 15:31:02,676 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1470 transitions. Word has length 452 [2024-12-02 15:31:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 15:31:02,677 INFO L471 AbstractCegarLoop]: Abstraction has 1214 states and 1470 transitions. [2024-12-02 15:31:02,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 4.03125) internal successors, (516), 128 states have internal predecessors, (516), 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) [2024-12-02 15:31:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1470 transitions. [2024-12-02 15:31:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2024-12-02 15:31:02,683 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 15:31:02,683 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 15:31:02,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 15:31:02,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 15:31:02,884 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 15:31:02,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 15:31:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1720793643, now seen corresponding path program 11 times [2024-12-02 15:31:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 15:31:02,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103197233] [2024-12-02 15:31:02,885 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:31:02,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 15:31:12,141 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 127 check-sat command(s) [2024-12-02 15:31:12,141 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 15:31:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 40463 backedges. 1 proven. 31626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 15:31:22,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 15:31:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103197233] [2024-12-02 15:31:22,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103197233] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 15:31:22,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23350940] [2024-12-02 15:31:22,379 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 15:31:22,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 15:31:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 15:31:22,380 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 15:31:22,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79c3bd2-1a75-49e2-8c2b-0daa1416bcc2/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process