./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/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_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/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_013dc552-f0e6-47ab-8985-5cd9d719d76b/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 d0cee5b1964cd71f7406ad577c9568bfea84778de80728dfc08113baa4a027fc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:20:23,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:20:23,800 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:20:23,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:20:23,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:20:23,829 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:20:23,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:20:23,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:20:23,831 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:20:23,832 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:20:23,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:20:23,833 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:20:23,833 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:20:23,834 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:20:23,835 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:20:23,835 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:20:23,836 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:20:23,836 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:20:23,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:20:23,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:20:23,838 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:20:23,839 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:20:23,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:20:23,840 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:20:23,841 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:20:23,841 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:20:23,842 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:20:23,842 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:20:23,843 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:20:23,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:20:23,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:20:23,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:20:23,844 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:20:23,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:20:23,845 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:20:23,845 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:20:23,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:20:23,845 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:20:23,846 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:20:23,846 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:20:23,846 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:20:23,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:20:23,846 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_013dc552-f0e6-47ab-8985-5cd9d719d76b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0cee5b1964cd71f7406ad577c9568bfea84778de80728dfc08113baa4a027fc [2023-11-29 04:20:24,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:20:24,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:20:24,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:20:24,064 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:20:24,065 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:20:24,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2023-11-29 04:20:26,729 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:20:26,945 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:20:26,946 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2023-11-29 04:20:26,956 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/data/008ff26fe/204f4c24b93b4bb9a3a7db822538cd49/FLAGdfb9d8a44 [2023-11-29 04:20:27,287 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/data/008ff26fe/204f4c24b93b4bb9a3a7db822538cd49 [2023-11-29 04:20:27,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:20:27,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:20:27,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:20:27,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:20:27,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:20:27,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d5d39fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27, skipping insertion in model container [2023-11-29 04:20:27,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,328 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:20:27,491 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_013dc552-f0e6-47ab-8985-5cd9d719d76b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2023-11-29 04:20:27,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:20:27,505 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:20:27,545 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_013dc552-f0e6-47ab-8985-5cd9d719d76b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2023-11-29 04:20:27,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:20:27,563 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:20:27,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27 WrapperNode [2023-11-29 04:20:27,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:20:27,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:20:27,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:20:27,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:20:27,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,603 INFO L138 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 244 [2023-11-29 04:20:27,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:20:27,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:20:27,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:20:27,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:20:27,617 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,621 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,636 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 04:20:27,637 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,645 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,652 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,654 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,657 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:20:27,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:20:27,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:20:27,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:20:27,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (1/1) ... [2023-11-29 04:20:27,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:20:27,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:27,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:20:27,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:20:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:20:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:20:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:20:27,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:20:27,790 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:20:27,791 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:20:28,071 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:20:28,105 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:20:28,106 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 04:20:28,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:20:28 BoogieIcfgContainer [2023-11-29 04:20:28,106 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:20:28,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:20:28,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:20:28,111 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:20:28,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:20:27" (1/3) ... [2023-11-29 04:20:28,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2be1aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:20:28, skipping insertion in model container [2023-11-29 04:20:28,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:20:27" (2/3) ... [2023-11-29 04:20:28,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2be1aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:20:28, skipping insertion in model container [2023-11-29 04:20:28,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:20:28" (3/3) ... [2023-11-29 04:20:28,113 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2023-11-29 04:20:28,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:20:28,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:20:28,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:20:28,170 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;@20678be9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:20:28,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:20:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.7580645161290323) internal successors, (109), 63 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 04:20:28,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:28,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:28,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:28,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:28,196 INFO L85 PathProgramCache]: Analyzing trace with hash 553341809, now seen corresponding path program 1 times [2023-11-29 04:20:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:28,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080613014] [2023-11-29 04:20:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:28,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:28,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080613014] [2023-11-29 04:20:28,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080613014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:28,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:28,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:20:28,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346755899] [2023-11-29 04:20:28,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:28,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:20:28,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:28,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:20:28,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:20:28,553 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.7580645161290323) internal successors, (109), 63 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:28,616 INFO L93 Difference]: Finished difference Result 108 states and 182 transitions. [2023-11-29 04:20:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:20:28,618 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 04:20:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:28,626 INFO L225 Difference]: With dead ends: 108 [2023-11-29 04:20:28,626 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 04:20:28,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:20:28,632 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:28,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 283 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 04:20:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-29 04:20:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2023-11-29 04:20:28,664 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 22 [2023-11-29 04:20:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:28,664 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2023-11-29 04:20:28,665 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2023-11-29 04:20:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 04:20:28,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:28,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:28,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:20:28,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:28,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1178010663, now seen corresponding path program 1 times [2023-11-29 04:20:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:28,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482729810] [2023-11-29 04:20:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:28,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:28,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482729810] [2023-11-29 04:20:28,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482729810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:28,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:28,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:20:28,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157373776] [2023-11-29 04:20:28,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:28,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:20:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:20:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:28,768 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:28,796 INFO L93 Difference]: Finished difference Result 136 states and 205 transitions. [2023-11-29 04:20:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:20:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-29 04:20:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:28,798 INFO L225 Difference]: With dead ends: 136 [2023-11-29 04:20:28,798 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 04:20:28,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:28,800 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 50 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:28,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 177 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 04:20:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-11-29 04:20:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4891304347826086) internal successors, (137), 92 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 137 transitions. [2023-11-29 04:20:28,814 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 137 transitions. Word has length 38 [2023-11-29 04:20:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:28,815 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 137 transitions. [2023-11-29 04:20:28,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 137 transitions. [2023-11-29 04:20:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 04:20:28,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:28,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:28,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:20:28,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:28,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2089214662, now seen corresponding path program 1 times [2023-11-29 04:20:28,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:28,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538884034] [2023-11-29 04:20:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:28,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:28,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:28,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538884034] [2023-11-29 04:20:28,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538884034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:28,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:28,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:20:28,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393969992] [2023-11-29 04:20:28,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:28,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:20:28,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:20:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:20:28,939 INFO L87 Difference]: Start difference. First operand 93 states and 137 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:29,034 INFO L93 Difference]: Finished difference Result 381 states and 601 transitions. [2023-11-29 04:20:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:20:29,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-29 04:20:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:29,039 INFO L225 Difference]: With dead ends: 381 [2023-11-29 04:20:29,039 INFO L226 Difference]: Without dead ends: 309 [2023-11-29 04:20:29,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:20:29,051 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 389 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:29,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 356 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-29 04:20:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 163. [2023-11-29 04:20:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5308641975308641) internal successors, (248), 162 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 248 transitions. [2023-11-29 04:20:29,076 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 248 transitions. Word has length 38 [2023-11-29 04:20:29,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:29,076 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 248 transitions. [2023-11-29 04:20:29,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 248 transitions. [2023-11-29 04:20:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 04:20:29,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:29,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:29,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:20:29,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:29,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash 328114147, now seen corresponding path program 1 times [2023-11-29 04:20:29,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:29,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708935778] [2023-11-29 04:20:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:29,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:29,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708935778] [2023-11-29 04:20:29,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708935778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:29,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:29,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:20:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831692316] [2023-11-29 04:20:29,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:29,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:20:29,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:20:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:20:29,240 INFO L87 Difference]: Start difference. First operand 163 states and 248 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:29,266 INFO L93 Difference]: Finished difference Result 177 states and 265 transitions. [2023-11-29 04:20:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:20:29,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 04:20:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:29,268 INFO L225 Difference]: With dead ends: 177 [2023-11-29 04:20:29,268 INFO L226 Difference]: Without dead ends: 175 [2023-11-29 04:20:29,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:20:29,270 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:29,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 242 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-29 04:20:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2023-11-29 04:20:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5058823529411764) internal successors, (256), 170 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 256 transitions. [2023-11-29 04:20:29,285 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 256 transitions. Word has length 39 [2023-11-29 04:20:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:29,285 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 256 transitions. [2023-11-29 04:20:29,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 256 transitions. [2023-11-29 04:20:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 04:20:29,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:29,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:29,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:20:29,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:29,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1582634382, now seen corresponding path program 1 times [2023-11-29 04:20:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:29,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455995342] [2023-11-29 04:20:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:29,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:29,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:29,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455995342] [2023-11-29 04:20:29,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455995342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:29,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:29,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:20:29,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693130156] [2023-11-29 04:20:29,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:29,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:20:29,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:20:29,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:29,343 INFO L87 Difference]: Start difference. First operand 171 states and 256 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:29,370 INFO L93 Difference]: Finished difference Result 443 states and 678 transitions. [2023-11-29 04:20:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:20:29,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 04:20:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:29,373 INFO L225 Difference]: With dead ends: 443 [2023-11-29 04:20:29,373 INFO L226 Difference]: Without dead ends: 293 [2023-11-29 04:20:29,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:29,376 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:29,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 141 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-29 04:20:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 287. [2023-11-29 04:20:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.5034965034965035) internal successors, (430), 286 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 430 transitions. [2023-11-29 04:20:29,393 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 430 transitions. Word has length 40 [2023-11-29 04:20:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:29,393 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 430 transitions. [2023-11-29 04:20:29,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 430 transitions. [2023-11-29 04:20:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 04:20:29,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:29,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:29,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 04:20:29,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:29,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1783001514, now seen corresponding path program 1 times [2023-11-29 04:20:29,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:29,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080902988] [2023-11-29 04:20:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:29,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:29,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:29,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080902988] [2023-11-29 04:20:29,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080902988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:29,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:29,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:20:29,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940329407] [2023-11-29 04:20:29,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:29,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:20:29,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:29,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:20:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:29,458 INFO L87 Difference]: Start difference. First operand 287 states and 430 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:29,491 INFO L93 Difference]: Finished difference Result 755 states and 1136 transitions. [2023-11-29 04:20:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:20:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-29 04:20:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:29,494 INFO L225 Difference]: With dead ends: 755 [2023-11-29 04:20:29,494 INFO L226 Difference]: Without dead ends: 489 [2023-11-29 04:20:29,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:29,497 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 46 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:29,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 175 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2023-11-29 04:20:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 487. [2023-11-29 04:20:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.477366255144033) internal successors, (718), 486 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 718 transitions. [2023-11-29 04:20:29,523 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 718 transitions. Word has length 41 [2023-11-29 04:20:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:29,523 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 718 transitions. [2023-11-29 04:20:29,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 718 transitions. [2023-11-29 04:20:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 04:20:29,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:29,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:29,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 04:20:29,526 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:29,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:29,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2069403532, now seen corresponding path program 1 times [2023-11-29 04:20:29,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:29,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677725711] [2023-11-29 04:20:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:29,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:29,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677725711] [2023-11-29 04:20:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677725711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:29,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:20:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36387475] [2023-11-29 04:20:29,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:29,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:20:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:29,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:20:29,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:29,574 INFO L87 Difference]: Start difference. First operand 487 states and 718 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:29,609 INFO L93 Difference]: Finished difference Result 942 states and 1404 transitions. [2023-11-29 04:20:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:20:29,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-29 04:20:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:29,613 INFO L225 Difference]: With dead ends: 942 [2023-11-29 04:20:29,613 INFO L226 Difference]: Without dead ends: 675 [2023-11-29 04:20:29,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:29,615 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 51 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:29,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 187 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2023-11-29 04:20:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2023-11-29 04:20:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.4642857142857142) internal successors, (984), 672 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 984 transitions. [2023-11-29 04:20:29,640 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 984 transitions. Word has length 42 [2023-11-29 04:20:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:29,641 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 984 transitions. [2023-11-29 04:20:29,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 984 transitions. [2023-11-29 04:20:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 04:20:29,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:29,643 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:29,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 04:20:29,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:29,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1411089419, now seen corresponding path program 1 times [2023-11-29 04:20:29,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:29,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189783703] [2023-11-29 04:20:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:29,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:20:29,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189783703] [2023-11-29 04:20:29,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189783703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:29,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:29,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:20:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842958511] [2023-11-29 04:20:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:29,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:20:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:20:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:20:29,755 INFO L87 Difference]: Start difference. First operand 673 states and 984 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:29,844 INFO L93 Difference]: Finished difference Result 1553 states and 2312 transitions. [2023-11-29 04:20:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:20:29,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-29 04:20:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:29,851 INFO L225 Difference]: With dead ends: 1553 [2023-11-29 04:20:29,852 INFO L226 Difference]: Without dead ends: 1223 [2023-11-29 04:20:29,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:20:29,853 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 231 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:29,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 387 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2023-11-29 04:20:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 993. [2023-11-29 04:20:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.467741935483871) internal successors, (1456), 992 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1456 transitions. [2023-11-29 04:20:29,886 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1456 transitions. Word has length 59 [2023-11-29 04:20:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:29,887 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1456 transitions. [2023-11-29 04:20:29,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1456 transitions. [2023-11-29 04:20:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 04:20:29,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:29,888 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:29,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 04:20:29,888 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:29,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash 399794666, now seen corresponding path program 1 times [2023-11-29 04:20:29,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:29,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478072219] [2023-11-29 04:20:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:29,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:20:29,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:29,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478072219] [2023-11-29 04:20:29,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478072219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:29,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:29,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:20:29,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294112239] [2023-11-29 04:20:29,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:29,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:20:29,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:20:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:20:29,996 INFO L87 Difference]: Start difference. First operand 993 states and 1456 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:30,080 INFO L93 Difference]: Finished difference Result 1873 states and 2784 transitions. [2023-11-29 04:20:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:20:30,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-29 04:20:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:30,091 INFO L225 Difference]: With dead ends: 1873 [2023-11-29 04:20:30,091 INFO L226 Difference]: Without dead ends: 1543 [2023-11-29 04:20:30,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:20:30,092 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 238 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:30,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 359 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2023-11-29 04:20:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1313. [2023-11-29 04:20:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 1.4695121951219512) internal successors, (1928), 1312 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1928 transitions. [2023-11-29 04:20:30,134 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1928 transitions. Word has length 59 [2023-11-29 04:20:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:30,135 INFO L495 AbstractCegarLoop]: Abstraction has 1313 states and 1928 transitions. [2023-11-29 04:20:30,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1928 transitions. [2023-11-29 04:20:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 04:20:30,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:30,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:30,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 04:20:30,137 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:30,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:30,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1593197684, now seen corresponding path program 1 times [2023-11-29 04:20:30,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:30,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001433127] [2023-11-29 04:20:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:30,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:30,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001433127] [2023-11-29 04:20:30,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001433127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:30,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:30,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:20:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346743747] [2023-11-29 04:20:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:20:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:20:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:30,214 INFO L87 Difference]: Start difference. First operand 1313 states and 1928 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:30,255 INFO L93 Difference]: Finished difference Result 2605 states and 3834 transitions. [2023-11-29 04:20:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:20:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-29 04:20:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:30,262 INFO L225 Difference]: With dead ends: 2605 [2023-11-29 04:20:30,262 INFO L226 Difference]: Without dead ends: 1315 [2023-11-29 04:20:30,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:30,264 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 42 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:30,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 175 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2023-11-29 04:20:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1313. [2023-11-29 04:20:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 1.451219512195122) internal successors, (1904), 1312 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1904 transitions. [2023-11-29 04:20:30,321 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1904 transitions. Word has length 60 [2023-11-29 04:20:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:30,321 INFO L495 AbstractCegarLoop]: Abstraction has 1313 states and 1904 transitions. [2023-11-29 04:20:30,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1904 transitions. [2023-11-29 04:20:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 04:20:30,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:30,322 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:30,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 04:20:30,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:30,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash -749647339, now seen corresponding path program 1 times [2023-11-29 04:20:30,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:30,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191398179] [2023-11-29 04:20:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:30,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:30,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:30,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191398179] [2023-11-29 04:20:30,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191398179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:30,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182139584] [2023-11-29 04:20:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:30,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:30,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:30,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:30,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:20:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:31,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:20:31,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:20:31,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:20:31,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182139584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:20:31,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:20:31,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-11-29 04:20:31,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678074928] [2023-11-29 04:20:31,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:20:31,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:20:31,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:31,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:20:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:20:31,388 INFO L87 Difference]: Start difference. First operand 1313 states and 1904 transitions. Second operand has 13 states, 13 states have (on average 13.0) internal successors, (169), 13 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:33,635 INFO L93 Difference]: Finished difference Result 8237 states and 11860 transitions. [2023-11-29 04:20:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 04:20:33,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.0) internal successors, (169), 13 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-29 04:20:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:33,676 INFO L225 Difference]: With dead ends: 8237 [2023-11-29 04:20:33,676 INFO L226 Difference]: Without dead ends: 7339 [2023-11-29 04:20:33,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 04:20:33,680 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1665 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:33,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 1017 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:20:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7339 states. [2023-11-29 04:20:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7339 to 6233. [2023-11-29 04:20:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 6232 states have (on average 1.4178433889602053) internal successors, (8836), 6232 states have internal predecessors, (8836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 8836 transitions. [2023-11-29 04:20:33,908 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 8836 transitions. Word has length 60 [2023-11-29 04:20:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:33,908 INFO L495 AbstractCegarLoop]: Abstraction has 6233 states and 8836 transitions. [2023-11-29 04:20:33,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.0) internal successors, (169), 13 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 8836 transitions. [2023-11-29 04:20:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 04:20:33,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:33,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:33,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:20:34,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:20:34,111 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:34,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash 241927816, now seen corresponding path program 1 times [2023-11-29 04:20:34,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:34,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13001946] [2023-11-29 04:20:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:20:34,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13001946] [2023-11-29 04:20:34,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13001946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:34,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:34,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:20:34,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450058594] [2023-11-29 04:20:34,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:34,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:20:34,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:20:34,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:20:34,203 INFO L87 Difference]: Start difference. First operand 6233 states and 8836 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:34,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:34,478 INFO L93 Difference]: Finished difference Result 10087 states and 14414 transitions. [2023-11-29 04:20:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:20:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-29 04:20:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:34,525 INFO L225 Difference]: With dead ends: 10087 [2023-11-29 04:20:34,526 INFO L226 Difference]: Without dead ends: 8875 [2023-11-29 04:20:34,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:20:34,530 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 225 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:34,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 401 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8875 states. [2023-11-29 04:20:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8875 to 7515. [2023-11-29 04:20:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7515 states, 7514 states have (on average 1.4154910833111525) internal successors, (10636), 7514 states have internal predecessors, (10636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 10636 transitions. [2023-11-29 04:20:34,893 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 10636 transitions. Word has length 61 [2023-11-29 04:20:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:34,894 INFO L495 AbstractCegarLoop]: Abstraction has 7515 states and 10636 transitions. [2023-11-29 04:20:34,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 10636 transitions. [2023-11-29 04:20:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 04:20:34,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:34,895 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:20:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 04:20:34,895 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:34,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1014919611, now seen corresponding path program 1 times [2023-11-29 04:20:34,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:34,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040865086] [2023-11-29 04:20:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:34,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:34,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040865086] [2023-11-29 04:20:34,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040865086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:20:34,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:20:34,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:20:34,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182383019] [2023-11-29 04:20:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:20:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:20:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:20:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:34,996 INFO L87 Difference]: Start difference. First operand 7515 states and 10636 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:20:35,119 INFO L93 Difference]: Finished difference Result 10612 states and 14938 transitions. [2023-11-29 04:20:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:20:35,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-29 04:20:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:20:35,135 INFO L225 Difference]: With dead ends: 10612 [2023-11-29 04:20:35,136 INFO L226 Difference]: Without dead ends: 3120 [2023-11-29 04:20:35,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:20:35,144 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 34 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:20:35,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 162 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:20:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2023-11-29 04:20:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 3118. [2023-11-29 04:20:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 1.3583573949310235) internal successors, (4234), 3117 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 4234 transitions. [2023-11-29 04:20:35,333 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 4234 transitions. Word has length 62 [2023-11-29 04:20:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:20:35,333 INFO L495 AbstractCegarLoop]: Abstraction has 3118 states and 4234 transitions. [2023-11-29 04:20:35,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:20:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 4234 transitions. [2023-11-29 04:20:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 04:20:35,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:20:35,335 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, 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 04:20:35,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 04:20:35,336 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:20:35,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:20:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash 914787371, now seen corresponding path program 1 times [2023-11-29 04:20:35,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:20:35,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359545493] [2023-11-29 04:20:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:20:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:35,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:20:35,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359545493] [2023-11-29 04:20:35,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359545493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:20:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315217996] [2023-11-29 04:20:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:20:35,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:20:35,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:20:35,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:20:35,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:20:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:20:35,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:20:35,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:20:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:37,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:20:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:20:39,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315217996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:20:39,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:20:39,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 16] total 36 [2023-11-29 04:20:39,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871619787] [2023-11-29 04:20:39,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:20:39,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 04:20:39,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:20:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 04:20:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 04:20:39,891 INFO L87 Difference]: Start difference. First operand 3118 states and 4234 transitions. Second operand has 36 states, 36 states have (on average 4.888888888888889) internal successors, (176), 36 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:03,519 INFO L93 Difference]: Finished difference Result 60854 states and 82006 transitions. [2023-11-29 04:21:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2023-11-29 04:21:03,519 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.888888888888889) internal successors, (176), 36 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-29 04:21:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:03,598 INFO L225 Difference]: With dead ends: 60854 [2023-11-29 04:21:03,598 INFO L226 Difference]: Without dead ends: 57761 [2023-11-29 04:21:03,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33039 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=12665, Invalid=58891, Unknown=0, NotChecked=0, Total=71556 [2023-11-29 04:21:03,632 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 5500 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 2936 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5500 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 3209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:03,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5500 Valid, 2408 Invalid, 3209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2936 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 04:21:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57761 states. [2023-11-29 04:21:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57761 to 34036. [2023-11-29 04:21:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34036 states, 34035 states have (on average 1.3443807844865578) internal successors, (45756), 34035 states have internal predecessors, (45756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34036 states to 34036 states and 45756 transitions. [2023-11-29 04:21:05,337 INFO L78 Accepts]: Start accepts. Automaton has 34036 states and 45756 transitions. Word has length 64 [2023-11-29 04:21:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:05,338 INFO L495 AbstractCegarLoop]: Abstraction has 34036 states and 45756 transitions. [2023-11-29 04:21:05,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.888888888888889) internal successors, (176), 36 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 34036 states and 45756 transitions. [2023-11-29 04:21:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 04:21:05,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:05,339 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:21:05,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:21:05,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:21:05,540 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:05,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:05,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1775311146, now seen corresponding path program 1 times [2023-11-29 04:21:05,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:05,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328579098] [2023-11-29 04:21:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:05,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:05,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328579098] [2023-11-29 04:21:05,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328579098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:21:05,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:21:05,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:21:05,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140647605] [2023-11-29 04:21:05,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:21:05,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:21:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:21:05,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:21:05,615 INFO L87 Difference]: Start difference. First operand 34036 states and 45756 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:06,416 INFO L93 Difference]: Finished difference Result 51961 states and 69754 transitions. [2023-11-29 04:21:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:21:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-29 04:21:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:06,444 INFO L225 Difference]: With dead ends: 51961 [2023-11-29 04:21:06,444 INFO L226 Difference]: Without dead ends: 21117 [2023-11-29 04:21:06,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:21:06,472 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:06,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 143 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:21:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21117 states. [2023-11-29 04:21:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21117 to 21115. [2023-11-29 04:21:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21115 states, 21114 states have (on average 1.3198825423889362) internal successors, (27868), 21114 states have internal predecessors, (27868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21115 states to 21115 states and 27868 transitions. [2023-11-29 04:21:07,449 INFO L78 Accepts]: Start accepts. Automaton has 21115 states and 27868 transitions. Word has length 64 [2023-11-29 04:21:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:07,450 INFO L495 AbstractCegarLoop]: Abstraction has 21115 states and 27868 transitions. [2023-11-29 04:21:07,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21115 states and 27868 transitions. [2023-11-29 04:21:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 04:21:07,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:07,451 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, 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 04:21:07,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 04:21:07,451 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:07,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1487582904, now seen corresponding path program 1 times [2023-11-29 04:21:07,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:07,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365779191] [2023-11-29 04:21:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:07,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365779191] [2023-11-29 04:21:07,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365779191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:07,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981051654] [2023-11-29 04:21:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:07,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:07,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:07,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:07,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:21:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:07,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:21:07,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:07,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:07,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981051654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:07,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:07,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 04:21:07,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217159392] [2023-11-29 04:21:07,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:07,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:21:07,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:21:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:21:07,927 INFO L87 Difference]: Start difference. First operand 21115 states and 27868 transitions. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:08,678 INFO L93 Difference]: Finished difference Result 36738 states and 48903 transitions. [2023-11-29 04:21:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:21:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 04:21:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:08,695 INFO L225 Difference]: With dead ends: 36738 [2023-11-29 04:21:08,696 INFO L226 Difference]: Without dead ends: 23140 [2023-11-29 04:21:08,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:21:08,705 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 367 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:08,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 236 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:21:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23140 states. [2023-11-29 04:21:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23140 to 22806. [2023-11-29 04:21:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22806 states, 22805 states have (on average 1.3169041876781407) internal successors, (30032), 22805 states have internal predecessors, (30032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22806 states to 22806 states and 30032 transitions. [2023-11-29 04:21:09,479 INFO L78 Accepts]: Start accepts. Automaton has 22806 states and 30032 transitions. Word has length 65 [2023-11-29 04:21:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:09,479 INFO L495 AbstractCegarLoop]: Abstraction has 22806 states and 30032 transitions. [2023-11-29 04:21:09,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 22806 states and 30032 transitions. [2023-11-29 04:21:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 04:21:09,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:09,482 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, 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 04:21:09,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 04:21:09,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:21:09,683 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:09,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash 780730908, now seen corresponding path program 1 times [2023-11-29 04:21:09,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:09,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578123615] [2023-11-29 04:21:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:09,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:09,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:09,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578123615] [2023-11-29 04:21:09,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578123615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:21:09,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:21:09,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:21:09,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129408844] [2023-11-29 04:21:09,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:21:09,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:21:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:09,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:21:09,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:21:09,729 INFO L87 Difference]: Start difference. First operand 22806 states and 30032 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:11,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:11,014 INFO L93 Difference]: Finished difference Result 51623 states and 67756 transitions. [2023-11-29 04:21:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:21:11,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 04:21:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:11,042 INFO L225 Difference]: With dead ends: 51623 [2023-11-29 04:21:11,042 INFO L226 Difference]: Without dead ends: 30082 [2023-11-29 04:21:11,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:21:11,056 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 38 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:11,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 177 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:21:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30082 states. [2023-11-29 04:21:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30082 to 25909. [2023-11-29 04:21:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25909 states, 25908 states have (on average 1.2926895167515826) internal successors, (33491), 25908 states have internal predecessors, (33491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25909 states to 25909 states and 33491 transitions. [2023-11-29 04:21:12,208 INFO L78 Accepts]: Start accepts. Automaton has 25909 states and 33491 transitions. Word has length 65 [2023-11-29 04:21:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:12,208 INFO L495 AbstractCegarLoop]: Abstraction has 25909 states and 33491 transitions. [2023-11-29 04:21:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 25909 states and 33491 transitions. [2023-11-29 04:21:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 04:21:12,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:12,211 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, 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 04:21:12,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 04:21:12,211 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:12,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:12,211 INFO L85 PathProgramCache]: Analyzing trace with hash 327884376, now seen corresponding path program 1 times [2023-11-29 04:21:12,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:12,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553409089] [2023-11-29 04:21:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:12,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:12,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553409089] [2023-11-29 04:21:12,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553409089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:21:12,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:21:12,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:21:12,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289291389] [2023-11-29 04:21:12,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:21:12,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:21:12,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:12,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:21:12,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:21:12,248 INFO L87 Difference]: Start difference. First operand 25909 states and 33491 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:13,527 INFO L93 Difference]: Finished difference Result 63027 states and 81162 transitions. [2023-11-29 04:21:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:21:13,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 04:21:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:13,554 INFO L225 Difference]: With dead ends: 63027 [2023-11-29 04:21:13,554 INFO L226 Difference]: Without dead ends: 37816 [2023-11-29 04:21:13,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:21:13,564 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:13,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 194 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:21:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37816 states. [2023-11-29 04:21:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37816 to 32252. [2023-11-29 04:21:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32252 states, 32251 states have (on average 1.2744100958109825) internal successors, (41101), 32251 states have internal predecessors, (41101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32252 states to 32252 states and 41101 transitions. [2023-11-29 04:21:14,855 INFO L78 Accepts]: Start accepts. Automaton has 32252 states and 41101 transitions. Word has length 65 [2023-11-29 04:21:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:14,855 INFO L495 AbstractCegarLoop]: Abstraction has 32252 states and 41101 transitions. [2023-11-29 04:21:14,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 32252 states and 41101 transitions. [2023-11-29 04:21:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 04:21:14,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:14,858 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, 1, 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 04:21:14,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 04:21:14,858 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:14,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1651643457, now seen corresponding path program 1 times [2023-11-29 04:21:14,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141678817] [2023-11-29 04:21:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:14,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141678817] [2023-11-29 04:21:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141678817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:21:14,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:21:14,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:21:14,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299027061] [2023-11-29 04:21:14,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:21:14,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:21:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:21:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:21:14,893 INFO L87 Difference]: Start difference. First operand 32252 states and 41101 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:21:16,085 INFO L93 Difference]: Finished difference Result 42388 states and 53799 transitions. [2023-11-29 04:21:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:21:16,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-29 04:21:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:21:16,110 INFO L225 Difference]: With dead ends: 42388 [2023-11-29 04:21:16,110 INFO L226 Difference]: Without dead ends: 26497 [2023-11-29 04:21:16,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:21:16,119 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 35 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:21:16,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 201 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:21:16,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26497 states. [2023-11-29 04:21:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26497 to 22849. [2023-11-29 04:21:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22849 states, 22848 states have (on average 1.248030462184874) internal successors, (28515), 22848 states have internal predecessors, (28515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22849 states to 22849 states and 28515 transitions. [2023-11-29 04:21:17,484 INFO L78 Accepts]: Start accepts. Automaton has 22849 states and 28515 transitions. Word has length 66 [2023-11-29 04:21:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:21:17,484 INFO L495 AbstractCegarLoop]: Abstraction has 22849 states and 28515 transitions. [2023-11-29 04:21:17,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:21:17,484 INFO L276 IsEmpty]: Start isEmpty. Operand 22849 states and 28515 transitions. [2023-11-29 04:21:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 04:21:17,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:21:17,487 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, 1, 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 04:21:17,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 04:21:17,487 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:21:17,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:21:17,487 INFO L85 PathProgramCache]: Analyzing trace with hash 20597721, now seen corresponding path program 1 times [2023-11-29 04:21:17,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:21:17,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810486196] [2023-11-29 04:21:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:17,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:21:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:19,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:21:19,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810486196] [2023-11-29 04:21:19,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810486196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:21:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964631198] [2023-11-29 04:21:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:21:19,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:21:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:21:19,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:21:19,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:21:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:21:19,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 04:21:19,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:21:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:19,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:21:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:21:22,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964631198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:21:22,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:21:22,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 14] total 42 [2023-11-29 04:21:22,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471232134] [2023-11-29 04:21:22,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:21:22,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 04:21:22,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:21:22,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 04:21:22,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1651, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 04:21:22,080 INFO L87 Difference]: Start difference. First operand 22849 states and 28515 transitions. Second operand has 43 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 42 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:25:00,390 INFO L93 Difference]: Finished difference Result 353213 states and 441981 transitions. [2023-11-29 04:25:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1209 states. [2023-11-29 04:25:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 42 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-29 04:25:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:25:00,727 INFO L225 Difference]: With dead ends: 353213 [2023-11-29 04:25:00,727 INFO L226 Difference]: Without dead ends: 332831 [2023-11-29 04:25:00,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1351 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 1242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754205 ImplicationChecksByTransitivity, 189.0s TimeCoverageRelationStatistics Valid=116734, Invalid=1429558, Unknown=0, NotChecked=0, Total=1546292 [2023-11-29 04:25:00,991 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 14039 mSDsluCounter, 11332 mSDsCounter, 0 mSdLazyCounter, 13558 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14039 SdHoareTripleChecker+Valid, 11747 SdHoareTripleChecker+Invalid, 14167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 13558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:25:00,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14039 Valid, 11747 Invalid, 14167 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [609 Valid, 13558 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2023-11-29 04:25:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332831 states. [2023-11-29 04:25:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332831 to 48339. [2023-11-29 04:25:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48339 states, 48338 states have (on average 1.2489345856262155) internal successors, (60371), 48338 states have internal predecessors, (60371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48339 states to 48339 states and 60371 transitions. [2023-11-29 04:25:05,979 INFO L78 Accepts]: Start accepts. Automaton has 48339 states and 60371 transitions. Word has length 66 [2023-11-29 04:25:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:25:05,979 INFO L495 AbstractCegarLoop]: Abstraction has 48339 states and 60371 transitions. [2023-11-29 04:25:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 42 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 48339 states and 60371 transitions. [2023-11-29 04:25:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 04:25:05,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:25:05,981 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, 1, 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 04:25:05,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:25:06,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:06,182 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:25:06,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2051553057, now seen corresponding path program 1 times [2023-11-29 04:25:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:06,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574658160] [2023-11-29 04:25:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:06,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:06,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:06,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574658160] [2023-11-29 04:25:06,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574658160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721706201] [2023-11-29 04:25:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:06,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:06,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:06,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:06,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:25:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:06,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:25:06,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:06,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721706201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:06,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:06,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 04:25:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440117504] [2023-11-29 04:25:06,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:06,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:25:06,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:06,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:25:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:25:06,610 INFO L87 Difference]: Start difference. First operand 48339 states and 60371 transitions. Second operand has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:25:09,761 INFO L93 Difference]: Finished difference Result 54919 states and 68358 transitions. [2023-11-29 04:25:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:25:09,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-29 04:25:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:25:09,791 INFO L225 Difference]: With dead ends: 54919 [2023-11-29 04:25:09,792 INFO L226 Difference]: Without dead ends: 48466 [2023-11-29 04:25:09,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:25:09,798 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 393 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:25:09,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 288 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:25:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48466 states. [2023-11-29 04:25:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48466 to 42548. [2023-11-29 04:25:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42548 states, 42547 states have (on average 1.2462923355348203) internal successors, (53026), 42547 states have internal predecessors, (53026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42548 states to 42548 states and 53026 transitions. [2023-11-29 04:25:13,096 INFO L78 Accepts]: Start accepts. Automaton has 42548 states and 53026 transitions. Word has length 66 [2023-11-29 04:25:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:25:13,096 INFO L495 AbstractCegarLoop]: Abstraction has 42548 states and 53026 transitions. [2023-11-29 04:25:13,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:13,096 INFO L276 IsEmpty]: Start isEmpty. Operand 42548 states and 53026 transitions. [2023-11-29 04:25:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-29 04:25:13,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:25:13,106 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:13,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:25:13,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:13,307 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:25:13,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash -601415119, now seen corresponding path program 1 times [2023-11-29 04:25:13,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:13,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685199169] [2023-11-29 04:25:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:13,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 04:25:13,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:13,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685199169] [2023-11-29 04:25:13,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685199169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:25:13,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:25:13,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:25:13,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505718870] [2023-11-29 04:25:13,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:25:13,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:25:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:25:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:25:13,367 INFO L87 Difference]: Start difference. First operand 42548 states and 53026 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:25:17,424 INFO L93 Difference]: Finished difference Result 83189 states and 103494 transitions. [2023-11-29 04:25:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:25:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2023-11-29 04:25:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:25:17,455 INFO L225 Difference]: With dead ends: 83189 [2023-11-29 04:25:17,455 INFO L226 Difference]: Without dead ends: 41579 [2023-11-29 04:25:17,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:25:17,470 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 27 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:25:17,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 209 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:25:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41579 states. [2023-11-29 04:25:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41579 to 26558. [2023-11-29 04:25:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26558 states, 26557 states have (on average 1.2085325902775164) internal successors, (32095), 26557 states have internal predecessors, (32095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26558 states to 26558 states and 32095 transitions. [2023-11-29 04:25:20,088 INFO L78 Accepts]: Start accepts. Automaton has 26558 states and 32095 transitions. Word has length 106 [2023-11-29 04:25:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:25:20,088 INFO L495 AbstractCegarLoop]: Abstraction has 26558 states and 32095 transitions. [2023-11-29 04:25:20,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 26558 states and 32095 transitions. [2023-11-29 04:25:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-29 04:25:20,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:25:20,093 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:20,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 04:25:20,094 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:25:20,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1466415916, now seen corresponding path program 1 times [2023-11-29 04:25:20,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:20,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457089786] [2023-11-29 04:25:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:21,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:21,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457089786] [2023-11-29 04:25:21,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457089786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:21,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491224892] [2023-11-29 04:25:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:21,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:21,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:21,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:25:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:21,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:25:21,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:22,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:24,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491224892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:24,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:24,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-11-29 04:25:24,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942937583] [2023-11-29 04:25:24,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:24,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 04:25:24,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 04:25:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 04:25:24,199 INFO L87 Difference]: Start difference. First operand 26558 states and 32095 transitions. Second operand has 42 states, 42 states have (on average 7.119047619047619) internal successors, (299), 42 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:25:43,623 INFO L93 Difference]: Finished difference Result 70858 states and 85289 transitions. [2023-11-29 04:25:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 04:25:43,623 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 7.119047619047619) internal successors, (299), 42 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-11-29 04:25:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:25:43,660 INFO L225 Difference]: With dead ends: 70858 [2023-11-29 04:25:43,661 INFO L226 Difference]: Without dead ends: 52580 [2023-11-29 04:25:43,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7640 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3382, Invalid=19268, Unknown=0, NotChecked=0, Total=22650 [2023-11-29 04:25:43,671 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 2627 mSDsluCounter, 3848 mSDsCounter, 0 mSdLazyCounter, 4110 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2627 SdHoareTripleChecker+Valid, 3969 SdHoareTripleChecker+Invalid, 4280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 4110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:25:43,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2627 Valid, 3969 Invalid, 4280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 4110 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 04:25:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52580 states. [2023-11-29 04:25:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52580 to 31485. [2023-11-29 04:25:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31485 states, 31484 states have (on average 1.2104243425231864) internal successors, (38109), 31484 states have internal predecessors, (38109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31485 states to 31485 states and 38109 transitions. [2023-11-29 04:25:47,352 INFO L78 Accepts]: Start accepts. Automaton has 31485 states and 38109 transitions. Word has length 107 [2023-11-29 04:25:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:25:47,352 INFO L495 AbstractCegarLoop]: Abstraction has 31485 states and 38109 transitions. [2023-11-29 04:25:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.119047619047619) internal successors, (299), 42 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 31485 states and 38109 transitions. [2023-11-29 04:25:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-29 04:25:47,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:25:47,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:47,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 04:25:47,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:47,558 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:25:47,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1688010028, now seen corresponding path program 1 times [2023-11-29 04:25:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:47,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800765711] [2023-11-29 04:25:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 04:25:47,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:47,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800765711] [2023-11-29 04:25:47,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800765711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:25:47,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:25:47,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:25:47,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645708065] [2023-11-29 04:25:47,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:25:47,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:25:47,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:25:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:25:47,627 INFO L87 Difference]: Start difference. First operand 31485 states and 38109 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:25:50,088 INFO L93 Difference]: Finished difference Result 36471 states and 43998 transitions. [2023-11-29 04:25:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:25:50,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-11-29 04:25:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:25:50,103 INFO L225 Difference]: With dead ends: 36471 [2023-11-29 04:25:50,103 INFO L226 Difference]: Without dead ends: 22658 [2023-11-29 04:25:50,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:25:50,108 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 24 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:25:50,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 180 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:25:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22658 states. [2023-11-29 04:25:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22658 to 20946. [2023-11-29 04:25:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20946 states, 20945 states have (on average 1.1850560993077106) internal successors, (24821), 20945 states have internal predecessors, (24821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20946 states to 20946 states and 24821 transitions. [2023-11-29 04:25:52,470 INFO L78 Accepts]: Start accepts. Automaton has 20946 states and 24821 transitions. Word has length 107 [2023-11-29 04:25:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:25:52,470 INFO L495 AbstractCegarLoop]: Abstraction has 20946 states and 24821 transitions. [2023-11-29 04:25:52,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:25:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 20946 states and 24821 transitions. [2023-11-29 04:25:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-29 04:25:52,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:25:52,475 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2023-11-29 04:25:52,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 04:25:52,475 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:25:52,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash -684104513, now seen corresponding path program 1 times [2023-11-29 04:25:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:52,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479463269] [2023-11-29 04:25:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:52,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:53,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479463269] [2023-11-29 04:25:53,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479463269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649807393] [2023-11-29 04:25:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:53,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:53,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:53,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_013dc552-f0e6-47ab-8985-5cd9d719d76b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:25:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:53,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 04:25:53,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:56,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:26:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:26:03,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649807393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:26:03,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:26:03,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 25] total 60 [2023-11-29 04:26:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124012644] [2023-11-29 04:26:03,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:26:03,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 04:26:03,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:26:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 04:26:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=3188, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 04:26:03,622 INFO L87 Difference]: Start difference. First operand 20946 states and 24821 transitions. Second operand has 60 states, 60 states have (on average 5.083333333333333) internal successors, (305), 60 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)