./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/relax-2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya --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 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:48:08,522 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:48:08,590 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:48:08,596 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:48:08,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:48:08,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:48:08,624 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:48:08,625 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:48:08,626 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:48:08,627 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:48:08,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:48:08,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:48:08,629 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:48:08,630 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:48:08,630 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:48:08,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:48:08,631 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:48:08,632 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:48:08,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:48:08,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:48:08,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:48:08,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:48:08,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:48:08,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:48:08,636 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:48:08,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:48:08,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:48:08,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:48:08,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:48:08,638 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:48:08,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:48:08,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:48:08,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:48:08,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:48:08,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:48:08,640 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:48:08,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:48:08,641 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:48:08,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:48:08,642 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:48:08,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:48:08,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:48:08,642 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2023-11-29 02:48:08,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:48:08,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:48:08,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:48:08,899 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:48:08,899 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:48:08,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/relax-2-2.i [2023-11-29 02:48:11,697 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:48:11,912 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:48:11,912 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/sv-benchmarks/c/array-examples/relax-2-2.i [2023-11-29 02:48:11,928 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/data/3281d6ddb/6f473b1daebd40a49df89b70adbefeee/FLAG5158ae8dd [2023-11-29 02:48:11,943 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/data/3281d6ddb/6f473b1daebd40a49df89b70adbefeee [2023-11-29 02:48:11,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:48:11,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:48:11,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:48:11,948 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:48:11,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:48:11,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:48:11" (1/1) ... [2023-11-29 02:48:11,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1483d894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:11, skipping insertion in model container [2023-11-29 02:48:11,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:48:11" (1/1) ... [2023-11-29 02:48:12,011 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:48:12,180 WARN L240 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_2d89751e-decd-4d09-a1c3-02eb4b0b553c/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2023-11-29 02:48:12,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:48:12,321 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:48:12,333 WARN L240 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_2d89751e-decd-4d09-a1c3-02eb4b0b553c/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2023-11-29 02:48:12,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:48:12,395 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:48:12,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12 WrapperNode [2023-11-29 02:48:12,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:48:12,397 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:48:12,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:48:12,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:48:12,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,447 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2023-11-29 02:48:12,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:48:12,448 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:48:12,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:48:12,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:48:12,461 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,465 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,481 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 02:48:12,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,489 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,495 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,497 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:48:12,501 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:48:12,502 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:48:12,502 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:48:12,503 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (1/1) ... [2023-11-29 02:48:12,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:48:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:12,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:48:12,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:48:12,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:48:12,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:48:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:48:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 02:48:12,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 02:48:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:48:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:48:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:48:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:48:12,577 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:48:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:48:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:48:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:48:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:48:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:48:12,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:48:12,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:48:12,691 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:48:12,694 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:48:12,939 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:48:12,967 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:48:12,968 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 02:48:12,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:48:12 BoogieIcfgContainer [2023-11-29 02:48:12,968 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:48:12,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:48:12,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:48:12,975 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:48:12,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:48:11" (1/3) ... [2023-11-29 02:48:12,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781e708e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:48:12, skipping insertion in model container [2023-11-29 02:48:12,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:48:12" (2/3) ... [2023-11-29 02:48:12,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781e708e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:48:12, skipping insertion in model container [2023-11-29 02:48:12,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:48:12" (3/3) ... [2023-11-29 02:48:12,978 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2023-11-29 02:48:13,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:48:13,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:48:13,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:48:13,060 INFO L357 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, mHoare=true, 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;@274c6a1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:48:13,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:48:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:48:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 02:48:13,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:13,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:13,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:13,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:13,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1395958249, now seen corresponding path program 1 times [2023-11-29 02:48:13,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:13,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461208118] [2023-11-29 02:48:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:13,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:13,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461208118] [2023-11-29 02:48:13,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461208118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:13,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:13,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:48:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559360780] [2023-11-29 02:48:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:13,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:48:13,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:13,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:48:13,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:48:13,293 INFO L87 Difference]: Start difference. First operand has 53 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:48:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:13,327 INFO L93 Difference]: Finished difference Result 104 states and 166 transitions. [2023-11-29 02:48:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:48:13,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-29 02:48:13,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:13,336 INFO L225 Difference]: With dead ends: 104 [2023-11-29 02:48:13,336 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 02:48:13,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:48:13,342 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:13,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:48:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 02:48:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 02:48:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 40 states have internal predecessors, (55), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2023-11-29 02:48:13,377 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 23 [2023-11-29 02:48:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:13,378 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2023-11-29 02:48:13,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:48:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2023-11-29 02:48:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 02:48:13,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:13,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:13,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:48:13,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:13,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:13,382 INFO L85 PathProgramCache]: Analyzing trace with hash -701553879, now seen corresponding path program 1 times [2023-11-29 02:48:13,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:13,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246801825] [2023-11-29 02:48:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:13,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:13,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246801825] [2023-11-29 02:48:13,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246801825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:13,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:13,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:48:13,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680950634] [2023-11-29 02:48:13,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:13,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:48:13,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:13,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:48:13,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:48:13,601 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:13,650 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2023-11-29 02:48:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:48:13,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-29 02:48:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:13,652 INFO L225 Difference]: With dead ends: 83 [2023-11-29 02:48:13,653 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 02:48:13,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:48:13,655 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:13,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 184 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:48:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 02:48:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-11-29 02:48:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 42 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2023-11-29 02:48:13,665 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 23 [2023-11-29 02:48:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:13,667 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2023-11-29 02:48:13,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2023-11-29 02:48:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 02:48:13,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:13,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:13,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:48:13,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:13,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:13,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1954555270, now seen corresponding path program 1 times [2023-11-29 02:48:13,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:13,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218706098] [2023-11-29 02:48:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:13,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:13,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218706098] [2023-11-29 02:48:13,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218706098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:13,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:13,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:48:13,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276124650] [2023-11-29 02:48:13,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:13,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:48:13,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:48:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:48:13,886 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:13,999 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2023-11-29 02:48:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:48:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-11-29 02:48:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:14,002 INFO L225 Difference]: With dead ends: 108 [2023-11-29 02:48:14,002 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 02:48:14,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:48:14,004 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 24 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:14,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 270 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:48:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 02:48:14,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2023-11-29 02:48:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.396551724137931) internal successors, (81), 59 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2023-11-29 02:48:14,041 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 26 [2023-11-29 02:48:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:14,041 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2023-11-29 02:48:14,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2023-11-29 02:48:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 02:48:14,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:14,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:14,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:48:14,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:14,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951562, now seen corresponding path program 1 times [2023-11-29 02:48:14,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:14,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496895953] [2023-11-29 02:48:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:14,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:14,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:14,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:14,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496895953] [2023-11-29 02:48:14,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496895953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:14,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9449807] [2023-11-29 02:48:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:14,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:14,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:14,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:48:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:14,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:48:14,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:14,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:14,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9449807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:14,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:48:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-11-29 02:48:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023349377] [2023-11-29 02:48:14,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:14,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:48:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:14,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:48:14,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:48:14,747 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:14,900 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2023-11-29 02:48:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:48:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-29 02:48:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:14,902 INFO L225 Difference]: With dead ends: 80 [2023-11-29 02:48:14,902 INFO L226 Difference]: Without dead ends: 78 [2023-11-29 02:48:14,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:48:14,904 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:14,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 203 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:48:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-29 02:48:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-11-29 02:48:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 62 states have internal predecessors, (84), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2023-11-29 02:48:14,918 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 27 [2023-11-29 02:48:14,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:14,919 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2023-11-29 02:48:14,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2023-11-29 02:48:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 02:48:14,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:14,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:14,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 02:48:15,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:15,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:15,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1366182202, now seen corresponding path program 1 times [2023-11-29 02:48:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:15,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152042220] [2023-11-29 02:48:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:15,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:15,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:15,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152042220] [2023-11-29 02:48:15,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152042220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:15,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:15,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:48:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333376623] [2023-11-29 02:48:15,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:15,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:48:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:48:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:48:15,445 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:15,717 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2023-11-29 02:48:15,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:48:15,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-29 02:48:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:15,719 INFO L225 Difference]: With dead ends: 114 [2023-11-29 02:48:15,719 INFO L226 Difference]: Without dead ends: 101 [2023-11-29 02:48:15,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:48:15,721 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 62 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:15,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 434 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:48:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-29 02:48:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2023-11-29 02:48:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 71 states have internal predecessors, (97), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2023-11-29 02:48:15,738 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 27 [2023-11-29 02:48:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:15,739 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2023-11-29 02:48:15,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2023-11-29 02:48:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 02:48:15,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:15,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:15,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:48:15,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:15,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:15,742 INFO L85 PathProgramCache]: Analyzing trace with hash -81168152, now seen corresponding path program 1 times [2023-11-29 02:48:15,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:15,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974371354] [2023-11-29 02:48:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:16,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:16,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974371354] [2023-11-29 02:48:16,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974371354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:16,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017396487] [2023-11-29 02:48:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:16,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:16,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:16,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:48:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:48:16,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:16,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017396487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:16,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:48:16,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-29 02:48:16,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781177967] [2023-11-29 02:48:16,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:16,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:48:16,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:16,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:48:16,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:48:16,248 INFO L87 Difference]: Start difference. First operand 81 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:16,328 INFO L93 Difference]: Finished difference Result 102 states and 133 transitions. [2023-11-29 02:48:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:48:16,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-29 02:48:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:16,330 INFO L225 Difference]: With dead ends: 102 [2023-11-29 02:48:16,330 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 02:48:16,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:48:16,332 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:16,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:48:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 02:48:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-29 02:48:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 71 states have internal predecessors, (95), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2023-11-29 02:48:16,364 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 28 [2023-11-29 02:48:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:16,364 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2023-11-29 02:48:16,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2023-11-29 02:48:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 02:48:16,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:16,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:16,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:48:16,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:16,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:16,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:16,568 INFO L85 PathProgramCache]: Analyzing trace with hash -167710709, now seen corresponding path program 1 times [2023-11-29 02:48:16,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:16,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228555183] [2023-11-29 02:48:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:16,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:16,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228555183] [2023-11-29 02:48:16,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228555183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:16,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:16,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:48:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433735624] [2023-11-29 02:48:16,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:16,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:48:16,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:48:16,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:48:16,672 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:16,710 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2023-11-29 02:48:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:48:16,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-29 02:48:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:16,712 INFO L225 Difference]: With dead ends: 100 [2023-11-29 02:48:16,712 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 02:48:16,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:48:16,713 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 17 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:16,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 162 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:48:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 02:48:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-29 02:48:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 69 states have internal predecessors, (90), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2023-11-29 02:48:16,730 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 30 [2023-11-29 02:48:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:16,731 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2023-11-29 02:48:16,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2023-11-29 02:48:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 02:48:16,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:16,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:16,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:48:16,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:16,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1120807757, now seen corresponding path program 1 times [2023-11-29 02:48:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:16,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519301005] [2023-11-29 02:48:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:16,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:16,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519301005] [2023-11-29 02:48:16,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519301005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:16,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:16,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:48:16,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550033087] [2023-11-29 02:48:16,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:16,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:16,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:16,780 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:16,814 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2023-11-29 02:48:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:16,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-29 02:48:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:16,816 INFO L225 Difference]: With dead ends: 117 [2023-11-29 02:48:16,816 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 02:48:16,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:16,817 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:16,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 117 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:48:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 02:48:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2023-11-29 02:48:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 83 states have internal predecessors, (108), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2023-11-29 02:48:16,834 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 30 [2023-11-29 02:48:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:16,834 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2023-11-29 02:48:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2023-11-29 02:48:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 02:48:16,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:16,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:48:16,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:16,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash -621149053, now seen corresponding path program 1 times [2023-11-29 02:48:16,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:16,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714748674] [2023-11-29 02:48:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:16,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:17,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:17,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:17,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714748674] [2023-11-29 02:48:17,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714748674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:17,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:17,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:48:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155493848] [2023-11-29 02:48:17,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:17,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:48:17,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:48:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:48:17,017 INFO L87 Difference]: Start difference. First operand 93 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:17,135 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2023-11-29 02:48:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:48:17,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-11-29 02:48:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:17,137 INFO L225 Difference]: With dead ends: 165 [2023-11-29 02:48:17,137 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 02:48:17,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:48:17,139 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:17,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 212 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:48:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 02:48:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-29 02:48:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 74 states have internal predecessors, (95), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2023-11-29 02:48:17,153 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 34 [2023-11-29 02:48:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:17,153 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2023-11-29 02:48:17,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2023-11-29 02:48:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 02:48:17,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:17,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:17,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:48:17,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:17,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash -442531397, now seen corresponding path program 1 times [2023-11-29 02:48:17,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:17,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086686162] [2023-11-29 02:48:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:17,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:17,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:17,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:17,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086686162] [2023-11-29 02:48:17,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086686162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:17,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431470258] [2023-11-29 02:48:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:17,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:17,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:17,569 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:17,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:48:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:17,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:48:17,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:17,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431470258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:17,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:17,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-11-29 02:48:17,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191747033] [2023-11-29 02:48:17,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:17,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:48:17,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:48:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:48:17,954 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:18,521 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2023-11-29 02:48:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:48:18,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-11-29 02:48:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:18,523 INFO L225 Difference]: With dead ends: 152 [2023-11-29 02:48:18,523 INFO L226 Difference]: Without dead ends: 111 [2023-11-29 02:48:18,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:48:18,525 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 62 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:18,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 732 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:48:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-29 02:48:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2023-11-29 02:48:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 67 states have internal predecessors, (89), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:48:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2023-11-29 02:48:18,538 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 35 [2023-11-29 02:48:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:18,539 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2023-11-29 02:48:18,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2023-11-29 02:48:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 02:48:18,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:18,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:18,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:48:18,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:48:18,741 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:18,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:18,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1321181741, now seen corresponding path program 1 times [2023-11-29 02:48:18,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:18,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520430276] [2023-11-29 02:48:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:18,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:18,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:18,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:48:18,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:18,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520430276] [2023-11-29 02:48:18,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520430276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:18,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957303283] [2023-11-29 02:48:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:18,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:18,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:18,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:18,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:48:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:18,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:48:18,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:19,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957303283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:19,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:19,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 14 [2023-11-29 02:48:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722974679] [2023-11-29 02:48:19,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:19,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:48:19,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:48:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:48:19,197 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:19,512 INFO L93 Difference]: Finished difference Result 159 states and 210 transitions. [2023-11-29 02:48:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:48:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-11-29 02:48:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:19,513 INFO L225 Difference]: With dead ends: 159 [2023-11-29 02:48:19,513 INFO L226 Difference]: Without dead ends: 109 [2023-11-29 02:48:19,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:48:19,515 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:19,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 592 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:48:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-29 02:48:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2023-11-29 02:48:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.289855072463768) internal successors, (89), 70 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:48:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2023-11-29 02:48:19,527 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 36 [2023-11-29 02:48:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:19,527 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2023-11-29 02:48:19,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2023-11-29 02:48:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 02:48:19,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:19,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:19,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:48:19,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:19,730 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:19,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 976824505, now seen corresponding path program 1 times [2023-11-29 02:48:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189447749] [2023-11-29 02:48:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:20,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:20,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189447749] [2023-11-29 02:48:20,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189447749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:20,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007096464] [2023-11-29 02:48:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:20,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:20,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:20,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:48:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:48:20,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:20,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:20,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007096464] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:20,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:48:20,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 14 [2023-11-29 02:48:20,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733963966] [2023-11-29 02:48:20,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:20,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:48:20,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:48:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:48:20,444 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:20,530 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2023-11-29 02:48:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:48:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-11-29 02:48:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:20,532 INFO L225 Difference]: With dead ends: 91 [2023-11-29 02:48:20,532 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 02:48:20,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:48:20,534 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 52 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:20,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 114 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:48:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 02:48:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-29 02:48:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 71 states have internal predecessors, (90), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:48:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2023-11-29 02:48:20,554 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 37 [2023-11-29 02:48:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:20,555 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2023-11-29 02:48:20,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2023-11-29 02:48:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 02:48:20,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:20,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:20,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:48:20,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:20,757 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:20,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2132065923, now seen corresponding path program 1 times [2023-11-29 02:48:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596918195] [2023-11-29 02:48:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:20,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-29 02:48:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:20,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:20,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596918195] [2023-11-29 02:48:20,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596918195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:20,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115489079] [2023-11-29 02:48:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:20,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:20,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:20,927 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:20,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:48:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:21,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:48:21,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:21,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:21,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115489079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:21,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:48:21,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-29 02:48:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321706618] [2023-11-29 02:48:21,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:21,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:48:21,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:48:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:48:21,161 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 02:48:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:21,307 INFO L93 Difference]: Finished difference Result 124 states and 156 transitions. [2023-11-29 02:48:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:48:21,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-11-29 02:48:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:21,309 INFO L225 Difference]: With dead ends: 124 [2023-11-29 02:48:21,309 INFO L226 Difference]: Without dead ends: 87 [2023-11-29 02:48:21,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:48:21,310 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 19 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:21,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 221 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:48:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-29 02:48:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-29 02:48:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.267605633802817) internal successors, (90), 72 states have internal predecessors, (90), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:48:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-11-29 02:48:21,323 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 40 [2023-11-29 02:48:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:21,323 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-11-29 02:48:21,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 02:48:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-11-29 02:48:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 02:48:21,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:21,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:21,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:48:21,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:21,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:21,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash 369673381, now seen corresponding path program 1 times [2023-11-29 02:48:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:21,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572217259] [2023-11-29 02:48:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:21,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:21,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 02:48:21,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572217259] [2023-11-29 02:48:21,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572217259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158757687] [2023-11-29 02:48:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:21,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:21,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:21,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:48:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:21,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:48:21,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:22,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 02:48:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158757687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:22,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:22,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2023-11-29 02:48:22,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443131357] [2023-11-29 02:48:22,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:22,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:48:22,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:48:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:48:22,163 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:22,918 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2023-11-29 02:48:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:48:22,919 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-29 02:48:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:22,921 INFO L225 Difference]: With dead ends: 223 [2023-11-29 02:48:22,921 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 02:48:22,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:48:22,923 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 279 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:22,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 828 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:48:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 02:48:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 100. [2023-11-29 02:48:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 89 states have internal predecessors, (115), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:48:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2023-11-29 02:48:22,945 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 40 [2023-11-29 02:48:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:22,947 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2023-11-29 02:48:22,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2023-11-29 02:48:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 02:48:22,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:22,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:22,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:48:23,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:48:23,149 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:23,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:23,150 INFO L85 PathProgramCache]: Analyzing trace with hash 371520423, now seen corresponding path program 1 times [2023-11-29 02:48:23,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:23,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773670144] [2023-11-29 02:48:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:23,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:23,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:23,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:23,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:23,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773670144] [2023-11-29 02:48:23,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773670144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:23,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425589292] [2023-11-29 02:48:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:23,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:23,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:23,392 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:23,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:48:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:23,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:48:23,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:23,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:23,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425589292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:23,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:23,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-29 02:48:23,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766989035] [2023-11-29 02:48:23,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:23,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:48:23,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:23,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:48:23,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:48:23,808 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:24,113 INFO L93 Difference]: Finished difference Result 210 states and 283 transitions. [2023-11-29 02:48:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:48:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-29 02:48:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:24,115 INFO L225 Difference]: With dead ends: 210 [2023-11-29 02:48:24,115 INFO L226 Difference]: Without dead ends: 185 [2023-11-29 02:48:24,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:48:24,116 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 132 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:24,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 722 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:48:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-29 02:48:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2023-11-29 02:48:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 133 states have internal predecessors, (174), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2023-11-29 02:48:24,146 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 40 [2023-11-29 02:48:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:24,146 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2023-11-29 02:48:24,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2023-11-29 02:48:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 02:48:24,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:24,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:24,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:48:24,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:48:24,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:24,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:24,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1049731751, now seen corresponding path program 1 times [2023-11-29 02:48:24,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:24,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421003682] [2023-11-29 02:48:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:24,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:25,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:25,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:48:25,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:25,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421003682] [2023-11-29 02:48:25,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421003682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:25,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578645636] [2023-11-29 02:48:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:25,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:25,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:25,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:25,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:48:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:25,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 02:48:25,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:25,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:48:25,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:48:25,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:48:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:25,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:25,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:48:25,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2023-11-29 02:48:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:48:25,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578645636] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:25,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:25,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2023-11-29 02:48:25,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330018321] [2023-11-29 02:48:25,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:48:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:48:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:48:25,703 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:26,366 INFO L93 Difference]: Finished difference Result 297 states and 399 transitions. [2023-11-29 02:48:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:48:26,366 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-29 02:48:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:26,368 INFO L225 Difference]: With dead ends: 297 [2023-11-29 02:48:26,368 INFO L226 Difference]: Without dead ends: 248 [2023-11-29 02:48:26,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:48:26,370 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 217 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:26,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 948 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:48:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-29 02:48:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 171. [2023-11-29 02:48:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 158 states have (on average 1.3291139240506329) internal successors, (210), 159 states have internal predecessors, (210), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 227 transitions. [2023-11-29 02:48:26,399 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 227 transitions. Word has length 40 [2023-11-29 02:48:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:26,400 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 227 transitions. [2023-11-29 02:48:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 227 transitions. [2023-11-29 02:48:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 02:48:26,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:26,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:26,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:48:26,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:48:26,601 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:26,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash 626139043, now seen corresponding path program 2 times [2023-11-29 02:48:26,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994639393] [2023-11-29 02:48:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:26,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:26,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:48:26,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994639393] [2023-11-29 02:48:26,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994639393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448559345] [2023-11-29 02:48:26,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:48:26,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:26,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:26,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:26,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:48:26,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:48:26,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:26,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:48:26,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:48:27,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:48:27,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448559345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:27,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:48:27,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-29 02:48:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152452297] [2023-11-29 02:48:27,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:27,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:48:27,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:27,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:48:27,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:48:27,022 INFO L87 Difference]: Start difference. First operand 171 states and 227 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:27,125 INFO L93 Difference]: Finished difference Result 251 states and 331 transitions. [2023-11-29 02:48:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:48:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-11-29 02:48:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:27,128 INFO L225 Difference]: With dead ends: 251 [2023-11-29 02:48:27,128 INFO L226 Difference]: Without dead ends: 242 [2023-11-29 02:48:27,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:48:27,129 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 18 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:27,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 176 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:48:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-29 02:48:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 171. [2023-11-29 02:48:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 158 states have (on average 1.3291139240506329) internal successors, (210), 159 states have internal predecessors, (210), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 227 transitions. [2023-11-29 02:48:27,179 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 227 transitions. Word has length 41 [2023-11-29 02:48:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:27,180 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 227 transitions. [2023-11-29 02:48:27,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 227 transitions. [2023-11-29 02:48:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 02:48:27,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:27,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:27,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 02:48:27,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:48:27,382 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:27,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1745918047, now seen corresponding path program 1 times [2023-11-29 02:48:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:27,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077824517] [2023-11-29 02:48:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:27,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:27,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:48:27,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:27,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077824517] [2023-11-29 02:48:27,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077824517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:27,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399484802] [2023-11-29 02:48:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:27,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:27,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:27,784 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:27,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:48:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:27,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:48:27,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:48:28,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:48:28,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399484802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:28,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:28,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2023-11-29 02:48:28,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373044990] [2023-11-29 02:48:28,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:28,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:48:28,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:28,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:48:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:48:28,200 INFO L87 Difference]: Start difference. First operand 171 states and 227 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:29,065 INFO L93 Difference]: Finished difference Result 412 states and 557 transitions. [2023-11-29 02:48:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:48:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-11-29 02:48:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:29,068 INFO L225 Difference]: With dead ends: 412 [2023-11-29 02:48:29,069 INFO L226 Difference]: Without dead ends: 397 [2023-11-29 02:48:29,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:48:29,070 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 243 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:29,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1206 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:48:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-29 02:48:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2023-11-29 02:48:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 191 states have (on average 1.3350785340314135) internal successors, (255), 192 states have internal predecessors, (255), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 272 transitions. [2023-11-29 02:48:29,110 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 272 transitions. Word has length 41 [2023-11-29 02:48:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:29,110 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 272 transitions. [2023-11-29 02:48:29,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 272 transitions. [2023-11-29 02:48:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 02:48:29,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:29,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:29,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 02:48:29,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:48:29,315 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:29,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1846631785, now seen corresponding path program 1 times [2023-11-29 02:48:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:29,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27360605] [2023-11-29 02:48:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:29,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:29,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:29,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 02:48:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:29,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27360605] [2023-11-29 02:48:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27360605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405070526] [2023-11-29 02:48:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:29,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:29,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:29,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:29,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:48:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:29,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:48:29,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:48:29,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:48:29,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405070526] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:29,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:48:29,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 8] total 13 [2023-11-29 02:48:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790238346] [2023-11-29 02:48:29,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:29,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:48:29,781 INFO L87 Difference]: Start difference. First operand 204 states and 272 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:29,850 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2023-11-29 02:48:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:29,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-11-29 02:48:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:29,853 INFO L225 Difference]: With dead ends: 234 [2023-11-29 02:48:29,853 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 02:48:29,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:48:29,854 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 5 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:29,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 116 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:48:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 02:48:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2023-11-29 02:48:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 195 states have (on average 1.3384615384615384) internal successors, (261), 196 states have internal predecessors, (261), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 278 transitions. [2023-11-29 02:48:29,890 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 278 transitions. Word has length 43 [2023-11-29 02:48:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:29,890 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 278 transitions. [2023-11-29 02:48:29,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 278 transitions. [2023-11-29 02:48:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 02:48:29,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:29,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:29,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:48:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:30,092 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:30,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 78334701, now seen corresponding path program 1 times [2023-11-29 02:48:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:30,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850285364] [2023-11-29 02:48:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:30,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:30,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:30,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:48:30,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:30,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850285364] [2023-11-29 02:48:30,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850285364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:30,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59469432] [2023-11-29 02:48:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:30,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:30,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:30,325 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:30,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:48:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:30,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:48:30,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:48:30,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:48:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59469432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:30,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:30,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-29 02:48:30,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200355348] [2023-11-29 02:48:30,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:30,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:48:30,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:30,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:48:30,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:48:30,690 INFO L87 Difference]: Start difference. First operand 208 states and 278 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:31,097 INFO L93 Difference]: Finished difference Result 335 states and 439 transitions. [2023-11-29 02:48:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:48:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-11-29 02:48:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:31,099 INFO L225 Difference]: With dead ends: 335 [2023-11-29 02:48:31,099 INFO L226 Difference]: Without dead ends: 252 [2023-11-29 02:48:31,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:48:31,100 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 101 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:31,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 570 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:48:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-29 02:48:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 198. [2023-11-29 02:48:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 185 states have (on average 1.308108108108108) internal successors, (242), 186 states have internal predecessors, (242), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2023-11-29 02:48:31,154 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 43 [2023-11-29 02:48:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:31,155 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2023-11-29 02:48:31,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2023-11-29 02:48:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 02:48:31,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:31,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:31,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:48:31,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:31,363 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:31,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:31,363 INFO L85 PathProgramCache]: Analyzing trace with hash 276110981, now seen corresponding path program 1 times [2023-11-29 02:48:31,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:31,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85262546] [2023-11-29 02:48:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:31,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:48:32,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:32,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85262546] [2023-11-29 02:48:32,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85262546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:32,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365371530] [2023-11-29 02:48:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:32,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:32,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:32,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:32,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:48:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:32,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 02:48:32,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:32,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:48:33,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:48:33,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:48:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:48:33,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:34,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:48:34,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2023-11-29 02:48:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:48:34,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365371530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:34,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:34,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 13] total 45 [2023-11-29 02:48:34,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842292920] [2023-11-29 02:48:34,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:34,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 02:48:34,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 02:48:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 02:48:34,488 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:35,618 INFO L93 Difference]: Finished difference Result 342 states and 448 transitions. [2023-11-29 02:48:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:48:35,618 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-11-29 02:48:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:35,620 INFO L225 Difference]: With dead ends: 342 [2023-11-29 02:48:35,620 INFO L226 Difference]: Without dead ends: 252 [2023-11-29 02:48:35,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=322, Invalid=2228, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:48:35,622 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 222 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:35,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1153 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:48:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-29 02:48:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 210. [2023-11-29 02:48:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 197 states have (on average 1.299492385786802) internal successors, (256), 198 states have internal predecessors, (256), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 273 transitions. [2023-11-29 02:48:35,660 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 273 transitions. Word has length 44 [2023-11-29 02:48:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:35,660 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 273 transitions. [2023-11-29 02:48:35,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 273 transitions. [2023-11-29 02:48:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 02:48:35,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:35,661 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:35,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:48:35,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:48:35,862 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:35,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash 987470701, now seen corresponding path program 2 times [2023-11-29 02:48:35,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:35,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432045358] [2023-11-29 02:48:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:35,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:36,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:36,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:48:36,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:36,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432045358] [2023-11-29 02:48:36,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432045358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:36,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072762698] [2023-11-29 02:48:36,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:48:36,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:36,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:36,086 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:36,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:48:36,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:48:36,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:36,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:48:36,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:48:36,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:48:36,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072762698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:36,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:36,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2023-11-29 02:48:36,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497045889] [2023-11-29 02:48:36,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:36,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:48:36,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:48:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:48:36,612 INFO L87 Difference]: Start difference. First operand 210 states and 273 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:37,454 INFO L93 Difference]: Finished difference Result 873 states and 1164 transitions. [2023-11-29 02:48:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 02:48:37,455 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-11-29 02:48:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:37,458 INFO L225 Difference]: With dead ends: 873 [2023-11-29 02:48:37,458 INFO L226 Difference]: Without dead ends: 756 [2023-11-29 02:48:37,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:48:37,459 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 190 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:37,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1145 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:48:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-11-29 02:48:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 278. [2023-11-29 02:48:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 265 states have (on average 1.320754716981132) internal successors, (350), 266 states have internal predecessors, (350), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 367 transitions. [2023-11-29 02:48:37,516 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 367 transitions. Word has length 45 [2023-11-29 02:48:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:37,517 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 367 transitions. [2023-11-29 02:48:37,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 367 transitions. [2023-11-29 02:48:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 02:48:37,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:37,518 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:37,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:48:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:48:37,718 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:37,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash 515764589, now seen corresponding path program 3 times [2023-11-29 02:48:37,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:37,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313309461] [2023-11-29 02:48:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:37,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:38,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:38,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:48:38,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:38,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313309461] [2023-11-29 02:48:38,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313309461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:38,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891714573] [2023-11-29 02:48:38,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:48:38,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:38,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:38,118 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:38,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:48:38,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:48:38,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:38,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:48:38,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:48:38,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:48:38,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891714573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:38,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:38,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2023-11-29 02:48:38,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398438346] [2023-11-29 02:48:38,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:38,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:48:38,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:48:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:48:38,617 INFO L87 Difference]: Start difference. First operand 278 states and 367 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:39,818 INFO L93 Difference]: Finished difference Result 616 states and 821 transitions. [2023-11-29 02:48:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 02:48:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2023-11-29 02:48:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:39,821 INFO L225 Difference]: With dead ends: 616 [2023-11-29 02:48:39,821 INFO L226 Difference]: Without dead ends: 607 [2023-11-29 02:48:39,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:48:39,822 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 347 mSDsluCounter, 1933 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:39,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 2081 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:48:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2023-11-29 02:48:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 253. [2023-11-29 02:48:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 240 states have (on average 1.3125) internal successors, (315), 241 states have internal predecessors, (315), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 332 transitions. [2023-11-29 02:48:39,888 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 332 transitions. Word has length 47 [2023-11-29 02:48:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:39,888 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 332 transitions. [2023-11-29 02:48:39,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 332 transitions. [2023-11-29 02:48:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 02:48:39,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:39,889 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:39,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:48:40,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 02:48:40,090 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:40,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:40,090 INFO L85 PathProgramCache]: Analyzing trace with hash 311166199, now seen corresponding path program 1 times [2023-11-29 02:48:40,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:40,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918703308] [2023-11-29 02:48:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:40,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:40,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:48:40,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:40,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918703308] [2023-11-29 02:48:40,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918703308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:40,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804358077] [2023-11-29 02:48:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:40,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:40,344 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:40,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:48:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:40,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:48:40,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 02:48:40,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:48:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804358077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:40,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:40,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 22 [2023-11-29 02:48:40,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455999430] [2023-11-29 02:48:40,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:40,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:48:40,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:40,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:48:40,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:48:40,788 INFO L87 Difference]: Start difference. First operand 253 states and 332 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:41,488 INFO L93 Difference]: Finished difference Result 636 states and 841 transitions. [2023-11-29 02:48:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:48:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2023-11-29 02:48:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:41,492 INFO L225 Difference]: With dead ends: 636 [2023-11-29 02:48:41,492 INFO L226 Difference]: Without dead ends: 466 [2023-11-29 02:48:41,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:48:41,493 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 133 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:41,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1133 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:48:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-29 02:48:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 283. [2023-11-29 02:48:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 270 states have (on average 1.3185185185185184) internal successors, (356), 271 states have internal predecessors, (356), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 373 transitions. [2023-11-29 02:48:41,571 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 373 transitions. Word has length 47 [2023-11-29 02:48:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:41,571 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 373 transitions. [2023-11-29 02:48:41,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 373 transitions. [2023-11-29 02:48:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 02:48:41,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:41,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:41,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:48:41,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:48:41,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:41,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:41,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2139935230, now seen corresponding path program 1 times [2023-11-29 02:48:41,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:41,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395225191] [2023-11-29 02:48:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:41,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:41,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:41,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:41,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 02:48:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:48:41,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:41,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395225191] [2023-11-29 02:48:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395225191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:41,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:41,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:48:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123446208] [2023-11-29 02:48:41,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:41,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:48:41,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:48:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:48:41,823 INFO L87 Difference]: Start difference. First operand 283 states and 373 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:41,938 INFO L93 Difference]: Finished difference Result 306 states and 400 transitions. [2023-11-29 02:48:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:48:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-11-29 02:48:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:41,939 INFO L225 Difference]: With dead ends: 306 [2023-11-29 02:48:41,939 INFO L226 Difference]: Without dead ends: 284 [2023-11-29 02:48:41,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:48:41,940 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:41,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 110 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:48:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-29 02:48:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 282. [2023-11-29 02:48:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 269 states have (on average 1.312267657992565) internal successors, (353), 270 states have internal predecessors, (353), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 370 transitions. [2023-11-29 02:48:42,006 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 370 transitions. Word has length 48 [2023-11-29 02:48:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:42,006 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 370 transitions. [2023-11-29 02:48:42,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 370 transitions. [2023-11-29 02:48:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 02:48:42,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:42,007 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 02:48:42,008 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:42,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash 974408095, now seen corresponding path program 4 times [2023-11-29 02:48:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:42,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287378710] [2023-11-29 02:48:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:42,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:42,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:48:42,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:42,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287378710] [2023-11-29 02:48:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287378710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:42,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778237139] [2023-11-29 02:48:42,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:48:42,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:42,895 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:42,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:48:43,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:48:43,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:43,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 02:48:43,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:43,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:48:43,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-29 02:48:43,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:48:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:48:43,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:43,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:48:43,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-11-29 02:48:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:48:44,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778237139] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:44,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:44,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2023-11-29 02:48:44,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351063805] [2023-11-29 02:48:44,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:44,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 02:48:44,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:44,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 02:48:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:48:44,029 INFO L87 Difference]: Start difference. First operand 282 states and 370 transitions. Second operand has 41 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:45,557 INFO L93 Difference]: Finished difference Result 523 states and 693 transitions. [2023-11-29 02:48:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:48:45,557 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-11-29 02:48:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:45,560 INFO L225 Difference]: With dead ends: 523 [2023-11-29 02:48:45,560 INFO L226 Difference]: Without dead ends: 459 [2023-11-29 02:48:45,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=365, Invalid=2827, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 02:48:45,562 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 285 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:45,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1568 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:48:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-11-29 02:48:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 322. [2023-11-29 02:48:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 309 states have (on average 1.3171521035598706) internal successors, (407), 310 states have internal predecessors, (407), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 424 transitions. [2023-11-29 02:48:45,639 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 424 transitions. Word has length 48 [2023-11-29 02:48:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:45,639 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 424 transitions. [2023-11-29 02:48:45,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 424 transitions. [2023-11-29 02:48:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 02:48:45,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:45,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:45,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:48:45,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 02:48:45,841 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:45,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash 451978619, now seen corresponding path program 2 times [2023-11-29 02:48:45,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:45,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757007560] [2023-11-29 02:48:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:45,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:46,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:46,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:48:46,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:46,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757007560] [2023-11-29 02:48:46,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757007560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:46,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219695443] [2023-11-29 02:48:46,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:48:46,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:46,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:46,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:46,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:48:46,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:48:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:46,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:48:46,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:48:46,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:48:46,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219695443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:46,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:46,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 30 [2023-11-29 02:48:46,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858319451] [2023-11-29 02:48:46,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:46,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:48:46,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:48:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:48:46,983 INFO L87 Difference]: Start difference. First operand 322 states and 424 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:49,493 INFO L93 Difference]: Finished difference Result 806 states and 1052 transitions. [2023-11-29 02:48:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 02:48:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-11-29 02:48:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:49,497 INFO L225 Difference]: With dead ends: 806 [2023-11-29 02:48:49,498 INFO L226 Difference]: Without dead ends: 710 [2023-11-29 02:48:49,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=392, Invalid=3640, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 02:48:49,499 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 342 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:49,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 2827 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 02:48:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-11-29 02:48:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 337. [2023-11-29 02:48:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 324 states have (on average 1.3179012345679013) internal successors, (427), 325 states have internal predecessors, (427), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 444 transitions. [2023-11-29 02:48:49,595 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 444 transitions. Word has length 48 [2023-11-29 02:48:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:49,595 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 444 transitions. [2023-11-29 02:48:49,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 444 transitions. [2023-11-29 02:48:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 02:48:49,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:49,596 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:49,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:48:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:48:49,797 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1501426435, now seen corresponding path program 2 times [2023-11-29 02:48:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061333340] [2023-11-29 02:48:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:49,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:49,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:49,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:48:49,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:49,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061333340] [2023-11-29 02:48:49,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061333340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:49,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179012625] [2023-11-29 02:48:49,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:48:49,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:49,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:49,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:49,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:48:50,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:48:50,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:50,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:48:50,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:48:50,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 02:48:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179012625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:50,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:50,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-29 02:48:50,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900497815] [2023-11-29 02:48:50,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:50,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:48:50,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:50,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:48:50,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:48:50,393 INFO L87 Difference]: Start difference. First operand 337 states and 444 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:50,931 INFO L93 Difference]: Finished difference Result 455 states and 585 transitions. [2023-11-29 02:48:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:48:50,931 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2023-11-29 02:48:50,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:50,933 INFO L225 Difference]: With dead ends: 455 [2023-11-29 02:48:50,934 INFO L226 Difference]: Without dead ends: 390 [2023-11-29 02:48:50,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:48:50,935 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 44 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:50,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1098 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:48:50,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-29 02:48:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 345. [2023-11-29 02:48:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 332 states have (on average 1.3102409638554218) internal successors, (435), 333 states have internal predecessors, (435), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:48:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 452 transitions. [2023-11-29 02:48:51,034 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 452 transitions. Word has length 50 [2023-11-29 02:48:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:51,034 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 452 transitions. [2023-11-29 02:48:51,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:48:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 452 transitions. [2023-11-29 02:48:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 02:48:51,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:51,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:51,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:48:51,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:48:51,236 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:51,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1736842255, now seen corresponding path program 1 times [2023-11-29 02:48:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748285460] [2023-11-29 02:48:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:51,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:51,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 02:48:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 02:48:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:48:51,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:51,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748285460] [2023-11-29 02:48:51,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748285460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:51,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589118021] [2023-11-29 02:48:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:51,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:51,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:51,394 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:51,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:48:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:51,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:48:51,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:48:51,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:48:51,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589118021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:51,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:51,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-29 02:48:51,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081073663] [2023-11-29 02:48:51,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:51,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:48:51,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:48:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:48:51,653 INFO L87 Difference]: Start difference. First operand 345 states and 452 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 02:48:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:51,987 INFO L93 Difference]: Finished difference Result 404 states and 525 transitions. [2023-11-29 02:48:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:48:51,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2023-11-29 02:48:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:51,990 INFO L225 Difference]: With dead ends: 404 [2023-11-29 02:48:51,990 INFO L226 Difference]: Without dead ends: 354 [2023-11-29 02:48:51,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:48:51,990 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 20 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:51,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 577 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:48:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-29 02:48:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 344. [2023-11-29 02:48:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 330 states have (on average 1.309090909090909) internal successors, (432), 331 states have internal predecessors, (432), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 02:48:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 451 transitions. [2023-11-29 02:48:52,112 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 451 transitions. Word has length 52 [2023-11-29 02:48:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:52,113 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 451 transitions. [2023-11-29 02:48:52,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 02:48:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 451 transitions. [2023-11-29 02:48:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 02:48:52,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:52,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:52,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:48:52,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:48:52,314 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:52,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:52,315 INFO L85 PathProgramCache]: Analyzing trace with hash -371393895, now seen corresponding path program 3 times [2023-11-29 02:48:52,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:52,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918440555] [2023-11-29 02:48:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:52,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:53,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:53,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:48:53,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918440555] [2023-11-29 02:48:53,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918440555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964277853] [2023-11-29 02:48:53,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:48:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:53,510 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:53,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:48:53,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:48:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:53,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 02:48:53,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:54,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:48:54,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 02:48:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 02:48:54,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:54,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:48:54,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-11-29 02:48:54,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:48:54,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2023-11-29 02:48:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 02:48:54,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964277853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:54,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:54,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 9] total 37 [2023-11-29 02:48:54,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142376620] [2023-11-29 02:48:54,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:54,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:48:54,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:48:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:48:54,732 INFO L87 Difference]: Start difference. First operand 344 states and 451 transitions. Second operand has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 36 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:56,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:48:56,579 INFO L93 Difference]: Finished difference Result 707 states and 927 transitions. [2023-11-29 02:48:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:48:56,580 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 36 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-11-29 02:48:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:48:56,582 INFO L225 Difference]: With dead ends: 707 [2023-11-29 02:48:56,582 INFO L226 Difference]: Without dead ends: 565 [2023-11-29 02:48:56,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 02:48:56,584 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 486 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:48:56,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 962 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:48:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-11-29 02:48:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2023-11-29 02:48:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 338 states have (on average 1.2958579881656804) internal successors, (438), 339 states have internal predecessors, (438), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 02:48:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2023-11-29 02:48:56,686 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 457 transitions. Word has length 52 [2023-11-29 02:48:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:48:56,686 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 457 transitions. [2023-11-29 02:48:56,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 36 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:48:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 457 transitions. [2023-11-29 02:48:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 02:48:56,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:48:56,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:56,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:48:56,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:56,888 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:48:56,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1909423011, now seen corresponding path program 4 times [2023-11-29 02:48:56,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:56,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440973059] [2023-11-29 02:48:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:58,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:48:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:58,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:48:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:48:58,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:58,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440973059] [2023-11-29 02:48:58,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440973059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:58,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046048677] [2023-11-29 02:48:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:48:58,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:58,034 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:58,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:48:58,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:48:58,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:58,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 02:48:58,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:58,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:48:58,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:48:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:48:58,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:58,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:48:58,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-11-29 02:48:58,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:48:58,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-11-29 02:48:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:48:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046048677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:59,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:59,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 39 [2023-11-29 02:48:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876021424] [2023-11-29 02:48:59,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:59,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:48:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:48:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 02:48:59,292 INFO L87 Difference]: Start difference. First operand 352 states and 457 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:00,859 INFO L93 Difference]: Finished difference Result 489 states and 627 transitions. [2023-11-29 02:49:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:49:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-11-29 02:49:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:00,862 INFO L225 Difference]: With dead ends: 489 [2023-11-29 02:49:00,862 INFO L226 Difference]: Without dead ends: 448 [2023-11-29 02:49:00,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:49:00,863 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 197 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:00,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1253 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:49:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-11-29 02:49:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 364. [2023-11-29 02:49:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 350 states have (on average 1.2857142857142858) internal successors, (450), 351 states have internal predecessors, (450), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 02:49:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 469 transitions. [2023-11-29 02:49:00,973 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 469 transitions. Word has length 52 [2023-11-29 02:49:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:00,973 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 469 transitions. [2023-11-29 02:49:00,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 469 transitions. [2023-11-29 02:49:00,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 02:49:00,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:00,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:00,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 02:49:01,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 02:49:01,175 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:01,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1235052101, now seen corresponding path program 5 times [2023-11-29 02:49:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:01,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878254116] [2023-11-29 02:49:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:02,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:02,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:49:02,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878254116] [2023-11-29 02:49:02,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878254116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13616437] [2023-11-29 02:49:02,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:49:02,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:02,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:02,148 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:02,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:49:03,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:49:03,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:03,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 02:49:03,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:03,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:49:03,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:49:03,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:49:03,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:49:03,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:49:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:49:03,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:49:04,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13616437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:04,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:04,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 18] total 41 [2023-11-29 02:49:04,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994702320] [2023-11-29 02:49:04,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:04,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 02:49:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 02:49:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:49:04,562 INFO L87 Difference]: Start difference. First operand 364 states and 469 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:05,808 INFO L93 Difference]: Finished difference Result 579 states and 744 transitions. [2023-11-29 02:49:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:49:05,808 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-11-29 02:49:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:05,811 INFO L225 Difference]: With dead ends: 579 [2023-11-29 02:49:05,811 INFO L226 Difference]: Without dead ends: 446 [2023-11-29 02:49:05,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 02:49:05,813 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 258 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:05,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1191 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:49:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-29 02:49:05,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 388. [2023-11-29 02:49:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 374 states have (on average 1.2834224598930482) internal successors, (480), 375 states have internal predecessors, (480), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 02:49:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 499 transitions. [2023-11-29 02:49:05,988 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 499 transitions. Word has length 52 [2023-11-29 02:49:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:05,988 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 499 transitions. [2023-11-29 02:49:05,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 499 transitions. [2023-11-29 02:49:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 02:49:05,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:05,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:05,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:49:06,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 02:49:06,190 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:06,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:06,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1812247042, now seen corresponding path program 1 times [2023-11-29 02:49:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835617056] [2023-11-29 02:49:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:06,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:06,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 02:49:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:06,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-29 02:49:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:49:06,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:06,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835617056] [2023-11-29 02:49:06,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835617056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:06,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457725252] [2023-11-29 02:49:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:06,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:06,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:06,372 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:06,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 02:49:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:06,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:49:06,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:49:06,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:49:06,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457725252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:06,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:06,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 20 [2023-11-29 02:49:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577602924] [2023-11-29 02:49:06,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:06,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:49:06,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:49:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:49:06,697 INFO L87 Difference]: Start difference. First operand 388 states and 499 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 02:49:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:07,350 INFO L93 Difference]: Finished difference Result 518 states and 662 transitions. [2023-11-29 02:49:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:49:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2023-11-29 02:49:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:07,353 INFO L225 Difference]: With dead ends: 518 [2023-11-29 02:49:07,353 INFO L226 Difference]: Without dead ends: 430 [2023-11-29 02:49:07,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:49:07,354 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 110 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:07,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 789 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:49:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-11-29 02:49:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 365. [2023-11-29 02:49:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 353 states have (on average 1.2861189801699717) internal successors, (454), 354 states have internal predecessors, (454), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:49:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 469 transitions. [2023-11-29 02:49:07,461 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 469 transitions. Word has length 54 [2023-11-29 02:49:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:07,461 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 469 transitions. [2023-11-29 02:49:07,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 02:49:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 469 transitions. [2023-11-29 02:49:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 02:49:07,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:07,462 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:07,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:49:07,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:07,663 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:07,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1017920245, now seen corresponding path program 2 times [2023-11-29 02:49:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:07,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048515838] [2023-11-29 02:49:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:07,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:07,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:49:07,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048515838] [2023-11-29 02:49:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048515838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504663690] [2023-11-29 02:49:07,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:49:07,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:07,839 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:07,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:49:07,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:49:07,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:07,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:49:07,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:49:08,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 02:49:08,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504663690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:08,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:08,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2023-11-29 02:49:08,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671036715] [2023-11-29 02:49:08,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:08,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:49:08,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:08,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:49:08,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:49:08,159 INFO L87 Difference]: Start difference. First operand 365 states and 469 transitions. Second operand has 21 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:08,664 INFO L93 Difference]: Finished difference Result 442 states and 566 transitions. [2023-11-29 02:49:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:49:08,665 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-11-29 02:49:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:08,666 INFO L225 Difference]: With dead ends: 442 [2023-11-29 02:49:08,666 INFO L226 Difference]: Without dead ends: 388 [2023-11-29 02:49:08,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:49:08,667 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 26 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:08,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1454 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:49:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-11-29 02:49:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 371. [2023-11-29 02:49:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 359 states have (on average 1.2924791086350975) internal successors, (464), 360 states have internal predecessors, (464), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:49:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 479 transitions. [2023-11-29 02:49:08,776 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 479 transitions. Word has length 53 [2023-11-29 02:49:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:08,776 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 479 transitions. [2023-11-29 02:49:08,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 479 transitions. [2023-11-29 02:49:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 02:49:08,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:08,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:08,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 02:49:08,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:08,977 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:08,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash 780238264, now seen corresponding path program 1 times [2023-11-29 02:49:08,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:08,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311989091] [2023-11-29 02:49:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:08,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:09,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:09,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:09,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 02:49:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:09,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 02:49:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:49:09,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:09,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311989091] [2023-11-29 02:49:09,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311989091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:09,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955921235] [2023-11-29 02:49:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:09,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:09,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:09,343 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:09,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 02:49:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:09,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 02:49:09,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:49:09,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 02:49:09,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955921235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:09,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:09,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 23 [2023-11-29 02:49:09,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453892854] [2023-11-29 02:49:09,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:49:09,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:49:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:49:09,908 INFO L87 Difference]: Start difference. First operand 371 states and 479 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 02:49:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:10,713 INFO L93 Difference]: Finished difference Result 490 states and 625 transitions. [2023-11-29 02:49:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:49:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2023-11-29 02:49:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:10,716 INFO L225 Difference]: With dead ends: 490 [2023-11-29 02:49:10,716 INFO L226 Difference]: Without dead ends: 430 [2023-11-29 02:49:10,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:49:10,717 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 171 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:10,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 703 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:49:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-11-29 02:49:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 373. [2023-11-29 02:49:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 361 states have (on average 1.2742382271468145) internal successors, (460), 362 states have internal predecessors, (460), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:49:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 475 transitions. [2023-11-29 02:49:10,837 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 475 transitions. Word has length 55 [2023-11-29 02:49:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:10,837 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 475 transitions. [2023-11-29 02:49:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 02:49:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 475 transitions. [2023-11-29 02:49:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 02:49:10,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:10,838 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:10,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 02:49:11,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:11,038 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:11,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:11,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2021244535, now seen corresponding path program 6 times [2023-11-29 02:49:11,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:11,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523387643] [2023-11-29 02:49:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:11,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:11,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:49:11,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:11,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523387643] [2023-11-29 02:49:11,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523387643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:11,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467829902] [2023-11-29 02:49:11,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:49:11,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:11,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:11,817 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:11,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 02:49:11,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 02:49:11,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:12,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 02:49:12,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:12,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 02:49:12,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-29 02:49:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:49:12,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:12,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:12,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-11-29 02:49:12,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:12,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-11-29 02:49:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 02:49:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467829902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:12,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:12,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 13] total 35 [2023-11-29 02:49:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822975937] [2023-11-29 02:49:12,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:49:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:49:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:49:12,876 INFO L87 Difference]: Start difference. First operand 373 states and 475 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:19,787 INFO L93 Difference]: Finished difference Result 942 states and 1214 transitions. [2023-11-29 02:49:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:49:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-11-29 02:49:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:19,791 INFO L225 Difference]: With dead ends: 942 [2023-11-29 02:49:19,791 INFO L226 Difference]: Without dead ends: 761 [2023-11-29 02:49:19,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=434, Invalid=3856, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 02:49:19,793 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 286 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:19,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 2297 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 02:49:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2023-11-29 02:49:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 398. [2023-11-29 02:49:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 386 states have (on average 1.2772020725388602) internal successors, (493), 387 states have internal predecessors, (493), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:49:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 508 transitions. [2023-11-29 02:49:19,931 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 508 transitions. Word has length 55 [2023-11-29 02:49:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:19,931 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 508 transitions. [2023-11-29 02:49:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 508 transitions. [2023-11-29 02:49:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:49:19,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:19,932 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:19,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 02:49:20,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:20,133 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:20,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash -724282073, now seen corresponding path program 5 times [2023-11-29 02:49:20,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:20,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83242665] [2023-11-29 02:49:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:21,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 02:49:21,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:21,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83242665] [2023-11-29 02:49:21,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83242665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:21,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119618797] [2023-11-29 02:49:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:49:21,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:21,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:21,089 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:21,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 02:49:22,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:49:22,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:22,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-29 02:49:22,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:22,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:49:23,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:49:23,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:49:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:49:23,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:23,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:23,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-11-29 02:49:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:49:24,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119618797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:24,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:24,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 14] total 51 [2023-11-29 02:49:24,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486489125] [2023-11-29 02:49:24,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:24,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 02:49:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 02:49:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2337, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 02:49:24,021 INFO L87 Difference]: Start difference. First operand 398 states and 508 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 02:49:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:29,579 INFO L93 Difference]: Finished difference Result 1107 states and 1423 transitions. [2023-11-29 02:49:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 02:49:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2023-11-29 02:49:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:29,584 INFO L225 Difference]: With dead ends: 1107 [2023-11-29 02:49:29,584 INFO L226 Difference]: Without dead ends: 1025 [2023-11-29 02:49:29,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1204, Invalid=10352, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 02:49:29,587 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 550 mSDsluCounter, 1879 mSDsCounter, 0 mSdLazyCounter, 3340 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:29,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1949 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3340 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 02:49:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2023-11-29 02:49:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 455. [2023-11-29 02:49:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 443 states have (on average 1.2776523702031604) internal successors, (566), 444 states have internal predecessors, (566), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:49:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 581 transitions. [2023-11-29 02:49:29,759 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 581 transitions. Word has length 56 [2023-11-29 02:49:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:29,759 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 581 transitions. [2023-11-29 02:49:29,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 02:49:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 581 transitions. [2023-11-29 02:49:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:49:29,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:29,761 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:29,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 02:49:29,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:29,962 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:29,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash 763339235, now seen corresponding path program 7 times [2023-11-29 02:49:29,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:29,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470798799] [2023-11-29 02:49:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:29,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:30,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:49:30,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:30,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470798799] [2023-11-29 02:49:30,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470798799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:30,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352177119] [2023-11-29 02:49:30,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:49:30,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:30,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:30,177 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:30,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 02:49:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:30,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:49:30,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:49:30,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:49:30,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352177119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:30,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:30,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2023-11-29 02:49:30,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181355821] [2023-11-29 02:49:30,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:30,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:49:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:49:30,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:49:30,771 INFO L87 Difference]: Start difference. First operand 455 states and 581 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:31,536 INFO L93 Difference]: Finished difference Result 772 states and 981 transitions. [2023-11-29 02:49:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:49:31,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2023-11-29 02:49:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:31,540 INFO L225 Difference]: With dead ends: 772 [2023-11-29 02:49:31,540 INFO L226 Difference]: Without dead ends: 726 [2023-11-29 02:49:31,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:49:31,541 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 71 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:31,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1164 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:49:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-29 02:49:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 524. [2023-11-29 02:49:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 512 states have (on average 1.2734375) internal successors, (652), 513 states have internal predecessors, (652), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:49:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 667 transitions. [2023-11-29 02:49:31,723 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 667 transitions. Word has length 56 [2023-11-29 02:49:31,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:31,723 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 667 transitions. [2023-11-29 02:49:31,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 667 transitions. [2023-11-29 02:49:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:49:31,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:31,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:31,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 02:49:31,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 02:49:31,926 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:31,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1064357489, now seen corresponding path program 8 times [2023-11-29 02:49:31,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:31,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995044059] [2023-11-29 02:49:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:31,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:32,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:49:32,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:32,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995044059] [2023-11-29 02:49:32,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995044059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545128760] [2023-11-29 02:49:32,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:49:32,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:32,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:32,251 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:32,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 02:49:32,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:49:32,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:32,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:49:32,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:49:32,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:49:32,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545128760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:32,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:32,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-11-29 02:49:32,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722937174] [2023-11-29 02:49:32,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:32,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 02:49:32,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:32,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 02:49:32,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:49:32,745 INFO L87 Difference]: Start difference. First operand 524 states and 667 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:33,624 INFO L93 Difference]: Finished difference Result 728 states and 927 transitions. [2023-11-29 02:49:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:49:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2023-11-29 02:49:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:33,627 INFO L225 Difference]: With dead ends: 728 [2023-11-29 02:49:33,627 INFO L226 Difference]: Without dead ends: 597 [2023-11-29 02:49:33,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 02:49:33,628 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 127 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:33,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 957 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:49:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-11-29 02:49:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 436. [2023-11-29 02:49:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 424 states have (on average 1.2617924528301887) internal successors, (535), 425 states have internal predecessors, (535), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:49:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 550 transitions. [2023-11-29 02:49:33,786 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 550 transitions. Word has length 56 [2023-11-29 02:49:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:33,786 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 550 transitions. [2023-11-29 02:49:33,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 550 transitions. [2023-11-29 02:49:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 02:49:33,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:33,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:33,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 02:49:33,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 02:49:33,987 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:33,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 710573062, now seen corresponding path program 2 times [2023-11-29 02:49:33,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:33,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747272815] [2023-11-29 02:49:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:33,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:34,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:34,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:34,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 02:49:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:34,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 02:49:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:49:34,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:34,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747272815] [2023-11-29 02:49:34,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747272815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:34,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806125533] [2023-11-29 02:49:34,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:49:34,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:34,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:34,513 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:34,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 02:49:34,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:49:34,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:34,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 02:49:34,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:34,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:49:38,747 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1|) 0) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|) 0))) is different from true [2023-11-29 02:49:38,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 02:49:38,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 02:49:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:49:38,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:38,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:38,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2023-11-29 02:49:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:49:38,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806125533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:38,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:38,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 23 [2023-11-29 02:49:38,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700989651] [2023-11-29 02:49:38,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:38,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:49:38,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:39,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:49:39,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=373, Unknown=1, NotChecked=40, Total=506 [2023-11-29 02:49:39,000 INFO L87 Difference]: Start difference. First operand 436 states and 550 transitions. Second operand has 23 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 23 states have internal predecessors, (82), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 02:49:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:39,619 INFO L93 Difference]: Finished difference Result 580 states and 731 transitions. [2023-11-29 02:49:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:49:39,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 23 states have internal predecessors, (82), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2023-11-29 02:49:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:39,622 INFO L225 Difference]: With dead ends: 580 [2023-11-29 02:49:39,622 INFO L226 Difference]: Without dead ends: 557 [2023-11-29 02:49:39,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=117, Invalid=486, Unknown=1, NotChecked=46, Total=650 [2023-11-29 02:49:39,623 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 140 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:39,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 641 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 428 Invalid, 0 Unknown, 208 Unchecked, 0.3s Time] [2023-11-29 02:49:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-11-29 02:49:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 452. [2023-11-29 02:49:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 438 states have (on average 1.2534246575342465) internal successors, (549), 439 states have internal predecessors, (549), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:49:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 566 transitions. [2023-11-29 02:49:39,792 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 566 transitions. Word has length 58 [2023-11-29 02:49:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:39,792 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 566 transitions. [2023-11-29 02:49:39,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 23 states have internal predecessors, (82), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 02:49:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 566 transitions. [2023-11-29 02:49:39,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 02:49:39,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:39,793 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:39,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 02:49:39,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 02:49:39,993 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:39,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:39,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1210937121, now seen corresponding path program 9 times [2023-11-29 02:49:39,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:39,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485865458] [2023-11-29 02:49:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:39,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:40,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:40,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:49:40,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:40,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485865458] [2023-11-29 02:49:40,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485865458] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:40,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303277209] [2023-11-29 02:49:40,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:49:40,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:40,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:40,428 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:40,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 02:49:41,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 02:49:41,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:41,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 02:49:41,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:49:41,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:49:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303277209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:41,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:41,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2023-11-29 02:49:41,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586468564] [2023-11-29 02:49:41,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:41,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:49:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:49:41,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:49:41,945 INFO L87 Difference]: Start difference. First operand 452 states and 566 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:43,677 INFO L93 Difference]: Finished difference Result 703 states and 877 transitions. [2023-11-29 02:49:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 02:49:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2023-11-29 02:49:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:43,680 INFO L225 Difference]: With dead ends: 703 [2023-11-29 02:49:43,680 INFO L226 Difference]: Without dead ends: 690 [2023-11-29 02:49:43,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=289, Invalid=2573, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 02:49:43,681 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 167 mSDsluCounter, 2213 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:43,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 2334 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:49:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2023-11-29 02:49:43,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 461. [2023-11-29 02:49:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 447 states have (on average 1.25503355704698) internal successors, (561), 448 states have internal predecessors, (561), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:49:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 578 transitions. [2023-11-29 02:49:43,886 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 578 transitions. Word has length 57 [2023-11-29 02:49:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:43,887 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 578 transitions. [2023-11-29 02:49:43,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 578 transitions. [2023-11-29 02:49:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 02:49:43,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:43,888 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:43,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 02:49:44,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:44,088 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:44,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash -383418867, now seen corresponding path program 3 times [2023-11-29 02:49:44,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:44,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872840792] [2023-11-29 02:49:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:44,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:44,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:44,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:49:44,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:44,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872840792] [2023-11-29 02:49:44,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872840792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279318477] [2023-11-29 02:49:44,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:49:44,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:44,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:44,271 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:44,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 02:49:44,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:49:44,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:44,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:49:44,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 02:49:44,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 02:49:44,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279318477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:44,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:44,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2023-11-29 02:49:44,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554360649] [2023-11-29 02:49:44,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:44,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:49:44,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:49:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:49:44,678 INFO L87 Difference]: Start difference. First operand 461 states and 578 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:45,550 INFO L93 Difference]: Finished difference Result 538 states and 673 transitions. [2023-11-29 02:49:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:49:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2023-11-29 02:49:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:45,552 INFO L225 Difference]: With dead ends: 538 [2023-11-29 02:49:45,552 INFO L226 Difference]: Without dead ends: 495 [2023-11-29 02:49:45,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:49:45,553 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 156 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:45,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1209 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:49:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2023-11-29 02:49:45,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 470. [2023-11-29 02:49:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 456 states have (on average 1.2478070175438596) internal successors, (569), 457 states have internal predecessors, (569), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:49:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 586 transitions. [2023-11-29 02:49:45,753 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 586 transitions. Word has length 57 [2023-11-29 02:49:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:45,753 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 586 transitions. [2023-11-29 02:49:45,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:49:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 586 transitions. [2023-11-29 02:49:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 02:49:45,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:45,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:45,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 02:49:45,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:45,955 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:45,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash 578118210, now seen corresponding path program 1 times [2023-11-29 02:49:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984492545] [2023-11-29 02:49:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:46,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:46,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:46,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:49:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-29 02:49:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:49:46,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:46,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984492545] [2023-11-29 02:49:46,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984492545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:46,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220554769] [2023-11-29 02:49:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:46,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:46,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:46,604 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:46,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 02:49:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:46,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 02:49:46,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:46,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:49:47,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-29 02:49:47,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:47,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 02:49:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:49:47,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:48,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:48,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 83 [2023-11-29 02:49:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:49:48,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220554769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:48,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:48,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 19] total 46 [2023-11-29 02:49:48,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223506140] [2023-11-29 02:49:48,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:48,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 02:49:48,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 02:49:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1823, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:49:48,411 INFO L87 Difference]: Start difference. First operand 470 states and 586 transitions. Second operand has 46 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 44 states have internal predecessors, (111), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 02:49:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:50,365 INFO L93 Difference]: Finished difference Result 811 states and 1027 transitions. [2023-11-29 02:49:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 02:49:50,365 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 44 states have internal predecessors, (111), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 59 [2023-11-29 02:49:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:50,369 INFO L225 Difference]: With dead ends: 811 [2023-11-29 02:49:50,369 INFO L226 Difference]: Without dead ends: 690 [2023-11-29 02:49:50,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=416, Invalid=3124, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 02:49:50,370 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 251 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:50,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1801 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:49:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2023-11-29 02:49:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 597. [2023-11-29 02:49:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 573 states have (on average 1.2547993019197208) internal successors, (719), 576 states have internal predecessors, (719), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 02:49:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 749 transitions. [2023-11-29 02:49:50,628 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 749 transitions. Word has length 59 [2023-11-29 02:49:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:50,629 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 749 transitions. [2023-11-29 02:49:50,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 44 states have internal predecessors, (111), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 02:49:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 749 transitions. [2023-11-29 02:49:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:49:50,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:50,630 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:50,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 02:49:50,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:50,831 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:50,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1911925243, now seen corresponding path program 10 times [2023-11-29 02:49:50,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:50,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013883469] [2023-11-29 02:49:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:50,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:51,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:51,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:49:51,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:51,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013883469] [2023-11-29 02:49:51,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013883469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:51,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312249092] [2023-11-29 02:49:51,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:49:51,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:51,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:51,959 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:51,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 02:49:52,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:49:52,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:52,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 02:49:52,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:52,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:49:52,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:49:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:49:52,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:53,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:53,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-11-29 02:49:53,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:53,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-11-29 02:49:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:49:53,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312249092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:53,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:53,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 16] total 46 [2023-11-29 02:49:53,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597214918] [2023-11-29 02:49:53,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:53,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 02:49:53,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 02:49:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1892, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:49:53,717 INFO L87 Difference]: Start difference. First operand 597 states and 749 transitions. Second operand has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:49:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:49:55,531 INFO L93 Difference]: Finished difference Result 805 states and 1011 transitions. [2023-11-29 02:49:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:49:55,532 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2023-11-29 02:49:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:49:55,536 INFO L225 Difference]: With dead ends: 805 [2023-11-29 02:49:55,536 INFO L226 Difference]: Without dead ends: 708 [2023-11-29 02:49:55,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=349, Invalid=3433, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 02:49:55,537 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 185 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:49:55,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1166 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:49:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-11-29 02:49:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 621. [2023-11-29 02:49:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 597 states have (on average 1.252931323283082) internal successors, (748), 600 states have internal predecessors, (748), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 02:49:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 778 transitions. [2023-11-29 02:49:55,808 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 778 transitions. Word has length 60 [2023-11-29 02:49:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:49:55,808 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 778 transitions. [2023-11-29 02:49:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:49:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 778 transitions. [2023-11-29 02:49:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:49:55,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:49:55,809 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:55,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 02:49:56,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:56,010 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:49:56,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1561808619, now seen corresponding path program 11 times [2023-11-29 02:49:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503774120] [2023-11-29 02:49:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:57,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:49:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:57,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:49:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:49:57,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503774120] [2023-11-29 02:49:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503774120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464426728] [2023-11-29 02:49:57,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:49:57,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:57,022 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:57,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 02:49:59,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 02:49:59,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:59,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 02:49:59,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:59,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:49:59,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:49:59,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:50:00,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:50:00,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:50:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:50:00,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:50:02,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464426728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:02,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:02,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 17] total 61 [2023-11-29 02:50:02,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938312268] [2023-11-29 02:50:02,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:02,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 02:50:02,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 02:50:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=3258, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 02:50:02,146 INFO L87 Difference]: Start difference. First operand 621 states and 778 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:50:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:05,516 INFO L93 Difference]: Finished difference Result 1041 states and 1314 transitions. [2023-11-29 02:50:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 02:50:05,516 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2023-11-29 02:50:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:05,520 INFO L225 Difference]: With dead ends: 1041 [2023-11-29 02:50:05,520 INFO L226 Difference]: Without dead ends: 917 [2023-11-29 02:50:05,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=720, Invalid=5600, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 02:50:05,521 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 311 mSDsluCounter, 2117 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:05,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 2208 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2965 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 02:50:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2023-11-29 02:50:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 655. [2023-11-29 02:50:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 631 states have (on average 1.2503961965134707) internal successors, (789), 634 states have internal predecessors, (789), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 02:50:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 819 transitions. [2023-11-29 02:50:05,817 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 819 transitions. Word has length 60 [2023-11-29 02:50:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:05,818 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 819 transitions. [2023-11-29 02:50:05,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:50:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 819 transitions. [2023-11-29 02:50:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:50:05,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:05,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:05,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 02:50:06,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 02:50:06,019 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:06,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash 581942277, now seen corresponding path program 12 times [2023-11-29 02:50:06,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:06,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507440073] [2023-11-29 02:50:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:06,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:07,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:50:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:50:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:50:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507440073] [2023-11-29 02:50:07,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507440073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62829682] [2023-11-29 02:50:07,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:50:07,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:07,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:07,155 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:07,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 02:50:08,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 02:50:08,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:50:08,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 02:50:08,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:08,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:50:08,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:50:09,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:50:09,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:50:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:50:09,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:10,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:50:10,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2023-11-29 02:50:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:50:11,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62829682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:11,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:11,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 17] total 61 [2023-11-29 02:50:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738130354] [2023-11-29 02:50:11,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:11,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 02:50:11,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 02:50:11,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3331, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 02:50:11,170 INFO L87 Difference]: Start difference. First operand 655 states and 819 transitions. Second operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 02:50:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:18,259 INFO L93 Difference]: Finished difference Result 1151 states and 1476 transitions. [2023-11-29 02:50:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 02:50:18,259 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2023-11-29 02:50:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:18,264 INFO L225 Difference]: With dead ends: 1151 [2023-11-29 02:50:18,264 INFO L226 Difference]: Without dead ends: 1045 [2023-11-29 02:50:18,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=777, Invalid=6705, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 02:50:18,265 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 420 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:18,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1492 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 02:50:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2023-11-29 02:50:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 894. [2023-11-29 02:50:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 870 states have (on average 1.2505747126436781) internal successors, (1088), 873 states have internal predecessors, (1088), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 02:50:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1118 transitions. [2023-11-29 02:50:18,753 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1118 transitions. Word has length 60 [2023-11-29 02:50:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:18,754 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1118 transitions. [2023-11-29 02:50:18,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 02:50:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1118 transitions. [2023-11-29 02:50:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:50:18,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:18,756 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:18,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 02:50:18,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 02:50:18,956 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:18,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:18,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1284948109, now seen corresponding path program 1 times [2023-11-29 02:50:18,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:18,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068405201] [2023-11-29 02:50:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:18,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:19,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:50:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:19,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:50:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:50:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:19,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068405201] [2023-11-29 02:50:19,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068405201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:19,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292494651] [2023-11-29 02:50:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:19,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:19,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:19,144 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:19,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 02:50:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:19,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:50:19,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 02:50:19,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-29 02:50:19,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292494651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:19,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:19,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 28 [2023-11-29 02:50:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600020237] [2023-11-29 02:50:19,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:19,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:50:19,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:50:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:50:19,624 INFO L87 Difference]: Start difference. First operand 894 states and 1118 transitions. Second operand has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:20,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:20,693 INFO L93 Difference]: Finished difference Result 1060 states and 1327 transitions. [2023-11-29 02:50:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:50:20,694 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2023-11-29 02:50:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:20,697 INFO L225 Difference]: With dead ends: 1060 [2023-11-29 02:50:20,697 INFO L226 Difference]: Without dead ends: 786 [2023-11-29 02:50:20,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:50:20,698 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 55 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:20,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1624 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:50:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2023-11-29 02:50:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 661. [2023-11-29 02:50:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 637 states have (on average 1.2558869701726845) internal successors, (800), 640 states have internal predecessors, (800), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 02:50:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 830 transitions. [2023-11-29 02:50:21,008 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 830 transitions. Word has length 60 [2023-11-29 02:50:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:21,008 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 830 transitions. [2023-11-29 02:50:21,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 830 transitions. [2023-11-29 02:50:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 02:50:21,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:21,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:21,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 02:50:21,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 02:50:21,210 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:21,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1959157615, now seen corresponding path program 6 times [2023-11-29 02:50:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83617611] [2023-11-29 02:50:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:50:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:21,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:50:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 02:50:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83617611] [2023-11-29 02:50:21,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83617611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159717564] [2023-11-29 02:50:21,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:50:21,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:21,645 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:21,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 02:50:22,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 02:50:22,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:50:22,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 02:50:22,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:22,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:50:23,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:50:23,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 02:50:23,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 02:50:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:50:23,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:50:24,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159717564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:24,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:24,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 14] total 52 [2023-11-29 02:50:24,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794882264] [2023-11-29 02:50:24,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:24,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 02:50:24,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:24,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 02:50:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2435, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 02:50:24,528 INFO L87 Difference]: Start difference. First operand 661 states and 830 transitions. Second operand has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 51 states have internal predecessors, (132), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 02:50:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:30,231 INFO L93 Difference]: Finished difference Result 1832 states and 2320 transitions. [2023-11-29 02:50:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 02:50:30,232 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 51 states have internal predecessors, (132), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2023-11-29 02:50:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:30,239 INFO L225 Difference]: With dead ends: 1832 [2023-11-29 02:50:30,239 INFO L226 Difference]: Without dead ends: 1618 [2023-11-29 02:50:30,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3274 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1190, Invalid=11466, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 02:50:30,241 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 520 mSDsluCounter, 2637 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 3328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:30,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 2748 Invalid, 3328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3270 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 02:50:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2023-11-29 02:50:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 863. [2023-11-29 02:50:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 839 states have (on average 1.2622169249106079) internal successors, (1059), 842 states have internal predecessors, (1059), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 02:50:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1089 transitions. [2023-11-29 02:50:30,659 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1089 transitions. Word has length 63 [2023-11-29 02:50:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:30,660 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1089 transitions. [2023-11-29 02:50:30,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 51 states have internal predecessors, (132), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 02:50:30,660 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1089 transitions. [2023-11-29 02:50:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 02:50:30,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:30,662 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:30,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 02:50:30,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 02:50:30,862 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:30,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash 729210487, now seen corresponding path program 13 times [2023-11-29 02:50:30,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:30,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479022851] [2023-11-29 02:50:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:30,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:31,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:50:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:31,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:50:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:50:31,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:31,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479022851] [2023-11-29 02:50:31,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479022851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:31,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911248229] [2023-11-29 02:50:31,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:50:31,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:31,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:31,682 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:31,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 02:50:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:31,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 02:50:31,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 02:50:32,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 02:50:32,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911248229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:32,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:32,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 14] total 46 [2023-11-29 02:50:32,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105683696] [2023-11-29 02:50:32,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:32,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 02:50:32,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:32,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 02:50:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1914, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:50:32,756 INFO L87 Difference]: Start difference. First operand 863 states and 1089 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:47,416 INFO L93 Difference]: Finished difference Result 2682 states and 3414 transitions. [2023-11-29 02:50:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 02:50:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2023-11-29 02:50:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:47,427 INFO L225 Difference]: With dead ends: 2682 [2023-11-29 02:50:47,427 INFO L226 Difference]: Without dead ends: 2151 [2023-11-29 02:50:47,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=639, Invalid=6843, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 02:50:47,429 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 434 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 3039 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:47,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 3039 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-29 02:50:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2023-11-29 02:50:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 934. [2023-11-29 02:50:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 910 states have (on average 1.2714285714285714) internal successors, (1157), 913 states have internal predecessors, (1157), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 02:50:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1187 transitions. [2023-11-29 02:50:47,973 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1187 transitions. Word has length 63 [2023-11-29 02:50:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:47,973 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1187 transitions. [2023-11-29 02:50:47,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1187 transitions. [2023-11-29 02:50:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:50:47,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:47,975 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:47,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-29 02:50:48,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 02:50:48,176 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:48,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -651177519, now seen corresponding path program 2 times [2023-11-29 02:50:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:48,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403444781] [2023-11-29 02:50:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:48,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:48,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:50:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:48,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:50:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:48,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 02:50:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:48,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 02:50:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:48,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-29 02:50:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 02:50:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:48,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403444781] [2023-11-29 02:50:48,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403444781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:48,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901153920] [2023-11-29 02:50:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:50:48,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:48,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:48,354 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:48,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 02:50:48,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:50:48,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:50:48,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:50:48,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:50:48,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:50:48,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901153920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:48,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:48,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-11-29 02:50:48,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456145728] [2023-11-29 02:50:48,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:50:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:50:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:50:48,775 INFO L87 Difference]: Start difference. First operand 934 states and 1187 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 02:50:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:49,692 INFO L93 Difference]: Finished difference Result 1052 states and 1329 transitions. [2023-11-29 02:50:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:50:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 66 [2023-11-29 02:50:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:49,696 INFO L225 Difference]: With dead ends: 1052 [2023-11-29 02:50:49,696 INFO L226 Difference]: Without dead ends: 934 [2023-11-29 02:50:49,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:50:49,697 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 41 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:49,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 669 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:50:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2023-11-29 02:50:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 930. [2023-11-29 02:50:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 906 states have (on average 1.270419426048565) internal successors, (1151), 909 states have internal predecessors, (1151), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-29 02:50:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1181 transitions. [2023-11-29 02:50:50,158 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1181 transitions. Word has length 66 [2023-11-29 02:50:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:50,158 INFO L495 AbstractCegarLoop]: Abstraction has 930 states and 1181 transitions. [2023-11-29 02:50:50,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 02:50:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1181 transitions. [2023-11-29 02:50:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 02:50:50,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:50,160 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:50,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 02:50:50,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 02:50:50,360 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:50,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1048595745, now seen corresponding path program 3 times [2023-11-29 02:50:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:50,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516306044] [2023-11-29 02:50:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:50,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:50,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:50:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:50,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:50:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:50,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:50:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:50,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 02:50:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:50,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-29 02:50:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 02:50:50,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:50,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516306044] [2023-11-29 02:50:50,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516306044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:50,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605945424] [2023-11-29 02:50:50,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:50:50,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:50,564 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:50,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 02:50:50,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:50:50,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:50:50,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:50:50,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:50:50,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:50:50,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605945424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:50,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:50:50,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2023-11-29 02:50:50,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500437285] [2023-11-29 02:50:50,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:50,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:50:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:50:50,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:50:50,755 INFO L87 Difference]: Start difference. First operand 930 states and 1181 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 02:50:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:51,305 INFO L93 Difference]: Finished difference Result 992 states and 1258 transitions. [2023-11-29 02:50:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:50:51,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2023-11-29 02:50:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:51,310 INFO L225 Difference]: With dead ends: 992 [2023-11-29 02:50:51,310 INFO L226 Difference]: Without dead ends: 950 [2023-11-29 02:50:51,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:50:51,310 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:51,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 174 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:50:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2023-11-29 02:50:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 926. [2023-11-29 02:50:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 904 states have (on average 1.2710176991150441) internal successors, (1149), 907 states have internal predecessors, (1149), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 02:50:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1175 transitions. [2023-11-29 02:50:51,773 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1175 transitions. Word has length 67 [2023-11-29 02:50:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:51,773 INFO L495 AbstractCegarLoop]: Abstraction has 926 states and 1175 transitions. [2023-11-29 02:50:51,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 02:50:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1175 transitions. [2023-11-29 02:50:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:50:51,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:51,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:51,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 02:50:51,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:51,975 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:51,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash 421227339, now seen corresponding path program 14 times [2023-11-29 02:50:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:51,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805311198] [2023-11-29 02:50:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:51,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:52,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:50:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:52,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:50:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 02:50:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:52,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805311198] [2023-11-29 02:50:52,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805311198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:52,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208455387] [2023-11-29 02:50:52,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:50:52,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:52,605 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:52,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 02:50:52,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:50:52,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:50:52,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:50:52,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 02:50:53,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 02:50:53,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208455387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:53,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:53,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 38 [2023-11-29 02:50:53,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578973156] [2023-11-29 02:50:53,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:53,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 02:50:53,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 02:50:53,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 02:50:53,439 INFO L87 Difference]: Start difference. First operand 926 states and 1175 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:55,810 INFO L93 Difference]: Finished difference Result 1739 states and 2172 transitions. [2023-11-29 02:50:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 02:50:55,811 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2023-11-29 02:50:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:55,816 INFO L225 Difference]: With dead ends: 1739 [2023-11-29 02:50:55,817 INFO L226 Difference]: Without dead ends: 1183 [2023-11-29 02:50:55,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 02:50:55,818 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 185 mSDsluCounter, 2202 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:55,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 2335 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:50:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2023-11-29 02:50:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 895. [2023-11-29 02:50:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 873 states have (on average 1.263459335624284) internal successors, (1103), 876 states have internal predecessors, (1103), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 02:50:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1129 transitions. [2023-11-29 02:50:56,278 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1129 transitions. Word has length 65 [2023-11-29 02:50:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:56,278 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1129 transitions. [2023-11-29 02:50:56,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1129 transitions. [2023-11-29 02:50:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:50:56,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:56,279 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:56,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 02:50:56,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:56,480 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:56,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash -405527043, now seen corresponding path program 2 times [2023-11-29 02:50:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:56,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934730600] [2023-11-29 02:50:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:56,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:50:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:50:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 02:50:56,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:56,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934730600] [2023-11-29 02:50:56,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934730600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:56,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070297755] [2023-11-29 02:50:56,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:50:56,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:56,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:56,706 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:56,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 02:50:56,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:50:56,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:50:56,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 02:50:56,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 50 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 02:50:57,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 50 proven. 18 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 02:50:57,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070297755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:57,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:57,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 34 [2023-11-29 02:50:57,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429702986] [2023-11-29 02:50:57,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:57,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:50:57,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:57,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:50:57,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:50:57,291 INFO L87 Difference]: Start difference. First operand 895 states and 1129 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:50:58,992 INFO L93 Difference]: Finished difference Result 1277 states and 1603 transitions. [2023-11-29 02:50:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 02:50:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2023-11-29 02:50:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:50:58,996 INFO L225 Difference]: With dead ends: 1277 [2023-11-29 02:50:58,996 INFO L226 Difference]: Without dead ends: 923 [2023-11-29 02:50:58,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=2156, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 02:50:58,997 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 71 mSDsluCounter, 1879 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:50:58,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 1960 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:50:58,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-11-29 02:50:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 828. [2023-11-29 02:50:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 806 states have (on average 1.2766749379652604) internal successors, (1029), 809 states have internal predecessors, (1029), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 02:50:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1055 transitions. [2023-11-29 02:50:59,428 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1055 transitions. Word has length 65 [2023-11-29 02:50:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:50:59,429 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1055 transitions. [2023-11-29 02:50:59,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:50:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1055 transitions. [2023-11-29 02:50:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:50:59,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:50:59,430 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:59,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 02:50:59,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 02:50:59,630 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:50:59,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash 86413047, now seen corresponding path program 15 times [2023-11-29 02:50:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:59,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188190681] [2023-11-29 02:50:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:59,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:00,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:51:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:51:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 02:51:00,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188190681] [2023-11-29 02:51:00,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188190681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508865094] [2023-11-29 02:51:00,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:51:00,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:00,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:00,030 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:00,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 02:51:01,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 02:51:01,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:51:01,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:51:01,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 02:51:01,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 02:51:01,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508865094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:51:01,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:51:01,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2023-11-29 02:51:01,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150065441] [2023-11-29 02:51:01,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:51:01,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 02:51:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 02:51:01,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:51:01,591 INFO L87 Difference]: Start difference. First operand 828 states and 1055 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:51:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:51:03,331 INFO L93 Difference]: Finished difference Result 1222 states and 1551 transitions. [2023-11-29 02:51:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:51:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2023-11-29 02:51:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:51:03,334 INFO L225 Difference]: With dead ends: 1222 [2023-11-29 02:51:03,334 INFO L226 Difference]: Without dead ends: 972 [2023-11-29 02:51:03,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1741, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 02:51:03,335 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 162 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:51:03,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 2072 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:51:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2023-11-29 02:51:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 694. [2023-11-29 02:51:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 672 states have (on average 1.2633928571428572) internal successors, (849), 675 states have internal predecessors, (849), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 02:51:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 875 transitions. [2023-11-29 02:51:03,730 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 875 transitions. Word has length 65 [2023-11-29 02:51:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:51:03,730 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 875 transitions. [2023-11-29 02:51:03,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 02:51:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 875 transitions. [2023-11-29 02:51:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 02:51:03,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:51:03,731 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:03,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 02:51:03,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 02:51:03,932 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:51:03,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -687057700, now seen corresponding path program 1 times [2023-11-29 02:51:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:03,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008416365] [2023-11-29 02:51:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:04,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:51:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:04,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:51:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:04,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 02:51:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:04,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 02:51:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:04,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-29 02:51:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 02:51:04,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:04,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008416365] [2023-11-29 02:51:04,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008416365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:04,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826702502] [2023-11-29 02:51:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:04,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:04,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:04,179 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:04,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 02:51:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:04,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:51:04,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 02:51:04,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 02:51:04,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826702502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:51:04,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:51:04,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2023-11-29 02:51:04,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901724543] [2023-11-29 02:51:04,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:51:04,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 02:51:04,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:04,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 02:51:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:51:04,670 INFO L87 Difference]: Start difference. First operand 694 states and 875 transitions. Second operand has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 27 states have internal predecessors, (96), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-29 02:51:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:51:05,556 INFO L93 Difference]: Finished difference Result 786 states and 983 transitions. [2023-11-29 02:51:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:51:05,557 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 27 states have internal predecessors, (96), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 68 [2023-11-29 02:51:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:51:05,558 INFO L225 Difference]: With dead ends: 786 [2023-11-29 02:51:05,558 INFO L226 Difference]: Without dead ends: 689 [2023-11-29 02:51:05,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:51:05,559 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 64 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:51:05,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 787 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:51:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-29 02:51:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 685. [2023-11-29 02:51:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 663 states have (on average 1.2639517345399698) internal successors, (838), 666 states have internal predecessors, (838), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 02:51:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 864 transitions. [2023-11-29 02:51:05,944 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 864 transitions. Word has length 68 [2023-11-29 02:51:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:51:05,944 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 864 transitions. [2023-11-29 02:51:05,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 27 states have internal predecessors, (96), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-29 02:51:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 864 transitions. [2023-11-29 02:51:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 02:51:05,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:51:05,945 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:05,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 02:51:06,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-29 02:51:06,146 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:51:06,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:06,146 INFO L85 PathProgramCache]: Analyzing trace with hash -333478912, now seen corresponding path program 2 times [2023-11-29 02:51:06,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:06,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896046639] [2023-11-29 02:51:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:06,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:07,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:51:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:07,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:51:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:07,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 02:51:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-29 02:51:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:07,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-29 02:51:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 02:51:07,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:07,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896046639] [2023-11-29 02:51:07,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896046639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:07,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551613908] [2023-11-29 02:51:07,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:51:07,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:07,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:07,809 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:07,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 02:51:07,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:51:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:51:07,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:51:07,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 02:51:08,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 02:51:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551613908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:51:09,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:51:09,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 30 [2023-11-29 02:51:09,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699495874] [2023-11-29 02:51:09,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:51:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:51:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:51:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:51:09,066 INFO L87 Difference]: Start difference. First operand 685 states and 864 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-29 02:51:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:51:11,127 INFO L93 Difference]: Finished difference Result 1064 states and 1335 transitions. [2023-11-29 02:51:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:51:11,128 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 69 [2023-11-29 02:51:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:51:11,129 INFO L225 Difference]: With dead ends: 1064 [2023-11-29 02:51:11,129 INFO L226 Difference]: Without dead ends: 917 [2023-11-29 02:51:11,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 02:51:11,130 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 204 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:51:11,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1391 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:51:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2023-11-29 02:51:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 691. [2023-11-29 02:51:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 669 states have (on average 1.249626307922272) internal successors, (836), 672 states have internal predecessors, (836), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 02:51:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 862 transitions. [2023-11-29 02:51:11,525 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 862 transitions. Word has length 69 [2023-11-29 02:51:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:51:11,525 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 862 transitions. [2023-11-29 02:51:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-29 02:51:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 862 transitions. [2023-11-29 02:51:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 02:51:11,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:51:11,527 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:11,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 02:51:11,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:11,727 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:51:11,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1425255399, now seen corresponding path program 16 times [2023-11-29 02:51:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:11,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516347547] [2023-11-29 02:51:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:13,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:51:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:13,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:51:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 02:51:13,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:13,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516347547] [2023-11-29 02:51:13,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516347547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:13,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400770199] [2023-11-29 02:51:13,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:51:13,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:13,041 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:13,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 02:51:13,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:51:13,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:51:13,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-29 02:51:13,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:51:15,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:16,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:51:16,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 112 [2023-11-29 02:51:16,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:51:16,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 92 [2023-11-29 02:51:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 02:51:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400770199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:51:17,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:51:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 20] total 69 [2023-11-29 02:51:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147392083] [2023-11-29 02:51:17,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:51:17,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-29 02:51:17,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-29 02:51:17,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=4299, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 02:51:17,501 INFO L87 Difference]: Start difference. First operand 691 states and 862 transitions. Second operand has 69 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 68 states have internal predecessors, (148), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:51:28,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:51:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:51:29,562 INFO L93 Difference]: Finished difference Result 1208 states and 1538 transitions. [2023-11-29 02:51:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 02:51:29,563 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 68 states have internal predecessors, (148), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-11-29 02:51:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:51:29,565 INFO L225 Difference]: With dead ends: 1208 [2023-11-29 02:51:29,565 INFO L226 Difference]: Without dead ends: 1092 [2023-11-29 02:51:29,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1137, Invalid=10419, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 02:51:29,566 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 615 mSDsluCounter, 3147 mSDsCounter, 0 mSdLazyCounter, 5184 mSolverCounterSat, 91 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 3246 SdHoareTripleChecker+Invalid, 5276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 5184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:51:29,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 3246 Invalid, 5276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 5184 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2023-11-29 02:51:29,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2023-11-29 02:51:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 707. [2023-11-29 02:51:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 685 states have (on average 1.2452554744525548) internal successors, (853), 688 states have internal predecessors, (853), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-29 02:51:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 879 transitions. [2023-11-29 02:51:30,017 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 879 transitions. Word has length 68 [2023-11-29 02:51:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:51:30,017 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 879 transitions. [2023-11-29 02:51:30,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 68 states have internal predecessors, (148), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 02:51:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 879 transitions. [2023-11-29 02:51:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 02:51:30,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:51:30,019 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:30,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 02:51:30,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:30,219 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:51:30,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:30,220 INFO L85 PathProgramCache]: Analyzing trace with hash 4214469, now seen corresponding path program 17 times [2023-11-29 02:51:30,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:30,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122445486] [2023-11-29 02:51:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:31,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:51:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:31,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-29 02:51:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 02:51:31,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:31,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122445486] [2023-11-29 02:51:31,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122445486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:31,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732075874] [2023-11-29 02:51:31,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:51:31,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:31,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:31,467 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:31,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d89751e-decd-4d09-a1c3-02eb4b0b553c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process