./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --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 791fd4c1f54f973c646b3f11f7eb2f654eca269cacf7e504443ee0d13fbe9694 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:18:57,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:18:57,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:18:57,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:18:57,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:18:57,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:18:57,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:18:57,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:18:57,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:18:57,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:18:57,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:18:57,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:18:57,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:18:57,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:18:57,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:18:57,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:18:57,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:18:57,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:18:57,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:18:57,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:18:57,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:18:57,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:18:57,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:18:57,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:18:57,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:18:57,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:18:57,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:18:57,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:18:57,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:18:57,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:18:57,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:18:57,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:18:57,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:18:57,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:18:57,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:18:57,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:18:57,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:18:57,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:18:57,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:18:57,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:18:57,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:18:57,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:18:57,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:18:57,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:18:57,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:18:57,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:18:57,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:18:57,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:18:57,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:18:57,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:18:57,561 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:18:57,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:18:57,563 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:18:57,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:18:57,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:18:57,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:18:57,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:18:57,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:18:57,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:18:57,565 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:18:57,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:18:57,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:18:57,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:18:57,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:18:57,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:18:57,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:18:57,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:18:57,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:18:57,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:18:57,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:18:57,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:18:57,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:18:57,568 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:18:57,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:18:57,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:18:57,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 791fd4c1f54f973c646b3f11f7eb2f654eca269cacf7e504443ee0d13fbe9694 [2022-11-20 11:18:57,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:18:58,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:18:58,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:18:58,008 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:18:58,009 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:18:58,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c [2022-11-20 11:19:01,535 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:19:02,027 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:19:02,029 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c [2022-11-20 11:19:02,073 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/data/08da2f4ed/ae84d091cbed48908794e009b100ac5f/FLAG56ce619c1 [2022-11-20 11:19:02,093 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/data/08da2f4ed/ae84d091cbed48908794e009b100ac5f [2022-11-20 11:19:02,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:19:02,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:19:02,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:19:02,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:19:02,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:19:02,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:19:02" (1/1) ... [2022-11-20 11:19:02,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e164ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:02, skipping insertion in model container [2022-11-20 11:19:02,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:19:02" (1/1) ... [2022-11-20 11:19:02,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:19:02,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:19:02,872 WARN L237 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_e90c2090-0e6b-4162-bf5d-39211c259513/sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c[62209,62222] [2022-11-20 11:19:03,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:19:03,138 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:19:03,189 WARN L237 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_e90c2090-0e6b-4162-bf5d-39211c259513/sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c[62209,62222] [2022-11-20 11:19:03,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:19:03,356 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:19:03,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03 WrapperNode [2022-11-20 11:19:03,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:19:03,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:19:03,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:19:03,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:19:03,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,522 INFO L138 Inliner]: procedures = 109, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1084 [2022-11-20 11:19:03,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:19:03,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:19:03,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:19:03,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:19:03,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:19:03,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:19:03,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:19:03,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:19:03,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (1/1) ... [2022-11-20 11:19:03,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:19:03,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:03,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:19:03,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:19:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2022-11-20 11:19:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2022-11-20 11:19:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-20 11:19:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-20 11:19:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-20 11:19:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:19:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-11-20 11:19:03,760 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-11-20 11:19:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:19:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-11-20 11:19:03,760 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-11-20 11:19:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-11-20 11:19:03,761 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-11-20 11:19:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:19:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:19:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:19:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:19:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-11-20 11:19:03,762 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-11-20 11:19:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2022-11-20 11:19:03,762 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2022-11-20 11:19:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:19:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:19:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:19:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-20 11:19:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:19:03,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:19:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2022-11-20 11:19:03,764 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2022-11-20 11:19:04,246 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:19:04,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:19:04,316 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-20 11:19:04,357 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-11-20 11:19:04,357 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-11-20 11:19:04,453 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-20 11:19:04,460 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-20 11:19:04,462 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-20 11:19:04,473 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-20 11:19:04,478 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-20 11:19:04,485 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-20 11:19:04,494 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-20 11:19:07,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume false; [2022-11-20 11:19:07,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume !false; [2022-11-20 11:19:07,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##36: assume !false; [2022-11-20 11:19:07,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume false; [2022-11-20 11:19:07,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-11-20 11:19:07,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-11-20 11:19:07,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-11-20 11:19:07,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-11-20 11:19:07,691 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-11-20 11:19:07,691 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##157: assume !false; [2022-11-20 11:19:07,691 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-11-20 11:19:07,691 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##156: assume false; [2022-11-20 11:19:07,691 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##114: assume !false; [2022-11-20 11:19:07,692 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##113: assume false; [2022-11-20 11:19:07,718 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:19:07,730 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:19:07,730 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 11:19:07,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:19:07 BoogieIcfgContainer [2022-11-20 11:19:07,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:19:07,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:19:07,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:19:07,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:19:07,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:19:02" (1/3) ... [2022-11-20 11:19:07,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6989b9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:19:07, skipping insertion in model container [2022-11-20 11:19:07,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:03" (2/3) ... [2022-11-20 11:19:07,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6989b9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:19:07, skipping insertion in model container [2022-11-20 11:19:07,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:19:07" (3/3) ... [2022-11-20 11:19:07,746 INFO L112 eAbstractionObserver]: Analyzing ICFG kbfiltr.i.cil-2.c [2022-11-20 11:19:07,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:19:07,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:19:07,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:19:07,888 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=LoopsAndPotentialCycles, 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;@64b3e2e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:19:07,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:19:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 239 states, 201 states have (on average 1.572139303482587) internal successors, (316), 219 states have internal predecessors, (316), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-20 11:19:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:19:07,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:07,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:07,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -660511979, now seen corresponding path program 1 times [2022-11-20 11:19:07,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:07,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319796959] [2022-11-20 11:19:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:08,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:08,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319796959] [2022-11-20 11:19:08,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319796959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:08,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:08,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:19:08,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461697209] [2022-11-20 11:19:08,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:08,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:19:08,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:19:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:19:08,698 INFO L87 Difference]: Start difference. First operand has 239 states, 201 states have (on average 1.572139303482587) internal successors, (316), 219 states have internal predecessors, (316), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:08,785 INFO L93 Difference]: Finished difference Result 472 states and 755 transitions. [2022-11-20 11:19:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:19:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 11:19:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:08,802 INFO L225 Difference]: With dead ends: 472 [2022-11-20 11:19:08,803 INFO L226 Difference]: Without dead ends: 231 [2022-11-20 11:19:08,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:19:08,815 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:08,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:19:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-20 11:19:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-20 11:19:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.5128205128205128) internal successors, (295), 211 states have internal predecessors, (295), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 11:19:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 339 transitions. [2022-11-20 11:19:08,901 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 339 transitions. Word has length 16 [2022-11-20 11:19:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:08,902 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 339 transitions. [2022-11-20 11:19:08,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 339 transitions. [2022-11-20 11:19:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:19:08,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:08,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:08,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:19:08,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1247317993, now seen corresponding path program 1 times [2022-11-20 11:19:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:08,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709260206] [2022-11-20 11:19:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709260206] [2022-11-20 11:19:09,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709260206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:09,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:09,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:09,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734588717] [2022-11-20 11:19:09,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:09,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:09,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:09,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:09,362 INFO L87 Difference]: Start difference. First operand 231 states and 339 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:11,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:11,437 INFO L93 Difference]: Finished difference Result 248 states and 360 transitions. [2022-11-20 11:19:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:11,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 11:19:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:11,440 INFO L225 Difference]: With dead ends: 248 [2022-11-20 11:19:11,441 INFO L226 Difference]: Without dead ends: 231 [2022-11-20 11:19:11,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:11,443 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 249 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:11,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 737 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 11:19:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-20 11:19:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-20 11:19:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.5076923076923077) internal successors, (294), 211 states have internal predecessors, (294), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 11:19:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 338 transitions. [2022-11-20 11:19:11,474 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 338 transitions. Word has length 16 [2022-11-20 11:19:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:11,475 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 338 transitions. [2022-11-20 11:19:11,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 338 transitions. [2022-11-20 11:19:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:19:11,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:11,477 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] [2022-11-20 11:19:11,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:19:11,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash 8900389, now seen corresponding path program 1 times [2022-11-20 11:19:11,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:11,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612543993] [2022-11-20 11:19:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:11,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:11,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612543993] [2022-11-20 11:19:11,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612543993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:11,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:11,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:11,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839380638] [2022-11-20 11:19:11,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:11,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:11,908 INFO L87 Difference]: Start difference. First operand 231 states and 338 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:12,397 INFO L93 Difference]: Finished difference Result 603 states and 904 transitions. [2022-11-20 11:19:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 11:19:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:12,401 INFO L225 Difference]: With dead ends: 603 [2022-11-20 11:19:12,402 INFO L226 Difference]: Without dead ends: 392 [2022-11-20 11:19:12,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:12,405 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 443 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:12,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1254 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:19:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-20 11:19:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 233. [2022-11-20 11:19:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 197 states have (on average 1.50253807106599) internal successors, (296), 213 states have internal predecessors, (296), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 11:19:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 340 transitions. [2022-11-20 11:19:12,443 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 340 transitions. Word has length 28 [2022-11-20 11:19:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:12,444 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 340 transitions. [2022-11-20 11:19:12,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 340 transitions. [2022-11-20 11:19:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:19:12,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:12,447 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] [2022-11-20 11:19:12,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:19:12,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash 620779237, now seen corresponding path program 1 times [2022-11-20 11:19:12,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:12,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537469180] [2022-11-20 11:19:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:12,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:12,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:12,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537469180] [2022-11-20 11:19:12,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537469180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:12,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:12,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:19:12,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021148118] [2022-11-20 11:19:12,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:19:12,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:12,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:19:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:19:12,891 INFO L87 Difference]: Start difference. First operand 233 states and 340 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:14,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:15,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:15,110 INFO L93 Difference]: Finished difference Result 354 states and 506 transitions. [2022-11-20 11:19:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:19:15,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 11:19:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:15,113 INFO L225 Difference]: With dead ends: 354 [2022-11-20 11:19:15,113 INFO L226 Difference]: Without dead ends: 299 [2022-11-20 11:19:15,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:19:15,115 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 244 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:15,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 477 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 70 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 11:19:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-20 11:19:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 283. [2022-11-20 11:19:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 246 states have (on average 1.4308943089430894) internal successors, (352), 249 states have internal predecessors, (352), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 18 states have call successors, (27) [2022-11-20 11:19:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 405 transitions. [2022-11-20 11:19:15,145 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 405 transitions. Word has length 28 [2022-11-20 11:19:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:15,146 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 405 transitions. [2022-11-20 11:19:15,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 405 transitions. [2022-11-20 11:19:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:19:15,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:15,148 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] [2022-11-20 11:19:15,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:19:15,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash -451775854, now seen corresponding path program 1 times [2022-11-20 11:19:15,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:15,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333298410] [2022-11-20 11:19:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:15,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:15,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333298410] [2022-11-20 11:19:15,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333298410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:15,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:15,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:19:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547434679] [2022-11-20 11:19:15,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:15,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:19:15,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:19:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:19:15,374 INFO L87 Difference]: Start difference. First operand 283 states and 405 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:15,430 INFO L93 Difference]: Finished difference Result 439 states and 613 transitions. [2022-11-20 11:19:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:19:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 11:19:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:15,436 INFO L225 Difference]: With dead ends: 439 [2022-11-20 11:19:15,436 INFO L226 Difference]: Without dead ends: 340 [2022-11-20 11:19:15,437 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 [2022-11-20 11:19:15,440 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 281 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:15,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 426 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:19:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-20 11:19:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 317. [2022-11-20 11:19:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 282 states have (on average 1.425531914893617) internal successors, (402), 283 states have internal predecessors, (402), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2022-11-20 11:19:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 450 transitions. [2022-11-20 11:19:15,477 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 450 transitions. Word has length 30 [2022-11-20 11:19:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:15,477 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 450 transitions. [2022-11-20 11:19:15,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 450 transitions. [2022-11-20 11:19:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 11:19:15,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:15,479 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] [2022-11-20 11:19:15,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:19:15,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1294247663, now seen corresponding path program 1 times [2022-11-20 11:19:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:15,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228466694] [2022-11-20 11:19:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:15,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228466694] [2022-11-20 11:19:15,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228466694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:15,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:15,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:15,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043602368] [2022-11-20 11:19:15,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:15,978 INFO L87 Difference]: Start difference. First operand 317 states and 450 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:17,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:18,186 INFO L93 Difference]: Finished difference Result 341 states and 477 transitions. [2022-11-20 11:19:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 11:19:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:18,190 INFO L225 Difference]: With dead ends: 341 [2022-11-20 11:19:18,190 INFO L226 Difference]: Without dead ends: 333 [2022-11-20 11:19:18,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:18,199 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 534 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:18,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 400 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:19:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-20 11:19:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 322. [2022-11-20 11:19:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 287 states have (on average 1.421602787456446) internal successors, (408), 288 states have internal predecessors, (408), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2022-11-20 11:19:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 456 transitions. [2022-11-20 11:19:18,266 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 456 transitions. Word has length 32 [2022-11-20 11:19:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:18,268 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 456 transitions. [2022-11-20 11:19:18,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 456 transitions. [2022-11-20 11:19:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:19:18,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:18,275 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] [2022-11-20 11:19:18,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:19:18,276 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1059548875, now seen corresponding path program 1 times [2022-11-20 11:19:18,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:18,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720007119] [2022-11-20 11:19:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:18,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:18,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720007119] [2022-11-20 11:19:18,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720007119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:18,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:18,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:18,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940542067] [2022-11-20 11:19:18,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:18,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:18,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:18,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:18,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:18,780 INFO L87 Difference]: Start difference. First operand 322 states and 456 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:20,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:21,110 INFO L93 Difference]: Finished difference Result 341 states and 476 transitions. [2022-11-20 11:19:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 11:19:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:21,114 INFO L225 Difference]: With dead ends: 341 [2022-11-20 11:19:21,115 INFO L226 Difference]: Without dead ends: 333 [2022-11-20 11:19:21,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:21,116 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 531 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:21,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 403 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 104 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 11:19:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-20 11:19:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 323. [2022-11-20 11:19:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 288 states have (on average 1.4201388888888888) internal successors, (409), 289 states have internal predecessors, (409), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2022-11-20 11:19:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 457 transitions. [2022-11-20 11:19:21,160 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 457 transitions. Word has length 33 [2022-11-20 11:19:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:21,160 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 457 transitions. [2022-11-20 11:19:21,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 457 transitions. [2022-11-20 11:19:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:19:21,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:21,162 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] [2022-11-20 11:19:21,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:19:21,163 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1752141914, now seen corresponding path program 1 times [2022-11-20 11:19:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904729402] [2022-11-20 11:19:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:21,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904729402] [2022-11-20 11:19:21,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904729402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:21,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:21,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:21,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941574258] [2022-11-20 11:19:21,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:21,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:21,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:21,468 INFO L87 Difference]: Start difference. First operand 323 states and 457 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:21,788 INFO L93 Difference]: Finished difference Result 335 states and 468 transitions. [2022-11-20 11:19:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 11:19:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:21,791 INFO L225 Difference]: With dead ends: 335 [2022-11-20 11:19:21,792 INFO L226 Difference]: Without dead ends: 293 [2022-11-20 11:19:21,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:21,794 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 521 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:21,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 401 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-20 11:19:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2022-11-20 11:19:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 258 states have (on average 1.441860465116279) internal successors, (372), 264 states have internal predecessors, (372), 22 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-20 11:19:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 412 transitions. [2022-11-20 11:19:21,840 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 412 transitions. Word has length 34 [2022-11-20 11:19:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:21,840 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 412 transitions. [2022-11-20 11:19:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 412 transitions. [2022-11-20 11:19:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:19:21,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:21,842 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] [2022-11-20 11:19:21,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:19:21,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash 350835753, now seen corresponding path program 1 times [2022-11-20 11:19:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:21,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737778299] [2022-11-20 11:19:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:22,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737778299] [2022-11-20 11:19:22,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737778299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:22,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:22,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:19:22,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484885069] [2022-11-20 11:19:22,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:22,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:19:22,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:19:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:19:22,076 INFO L87 Difference]: Start difference. First operand 290 states and 412 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:24,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:24,156 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2022-11-20 11:19:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:19:24,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 11:19:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:24,159 INFO L225 Difference]: With dead ends: 293 [2022-11-20 11:19:24,160 INFO L226 Difference]: Without dead ends: 289 [2022-11-20 11:19:24,160 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 [2022-11-20 11:19:24,161 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 26 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:24,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 535 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 11:19:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-20 11:19:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-20 11:19:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 258 states have (on average 1.434108527131783) internal successors, (370), 263 states have internal predecessors, (370), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-20 11:19:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 409 transitions. [2022-11-20 11:19:24,202 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 409 transitions. Word has length 34 [2022-11-20 11:19:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:24,203 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 409 transitions. [2022-11-20 11:19:24,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 409 transitions. [2022-11-20 11:19:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:19:24,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:24,205 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, 1] [2022-11-20 11:19:24,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:19:24,206 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:24,207 INFO L85 PathProgramCache]: Analyzing trace with hash 407921745, now seen corresponding path program 1 times [2022-11-20 11:19:24,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:24,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005242029] [2022-11-20 11:19:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:24,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005242029] [2022-11-20 11:19:24,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005242029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:24,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:24,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779886242] [2022-11-20 11:19:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:24,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:24,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:24,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:24,684 INFO L87 Difference]: Start difference. First operand 289 states and 409 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:24,922 INFO L93 Difference]: Finished difference Result 343 states and 476 transitions. [2022-11-20 11:19:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:24,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:19:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:24,926 INFO L225 Difference]: With dead ends: 343 [2022-11-20 11:19:24,926 INFO L226 Difference]: Without dead ends: 304 [2022-11-20 11:19:24,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:24,927 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 328 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:24,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 498 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-20 11:19:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 289. [2022-11-20 11:19:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 258 states have (on average 1.426356589147287) internal successors, (368), 263 states have internal predecessors, (368), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-20 11:19:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 407 transitions. [2022-11-20 11:19:24,972 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 407 transitions. Word has length 43 [2022-11-20 11:19:24,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:24,972 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 407 transitions. [2022-11-20 11:19:24,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 407 transitions. [2022-11-20 11:19:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:19:24,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:24,975 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, 1, 1] [2022-11-20 11:19:24,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:19:24,975 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:24,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1067937794, now seen corresponding path program 1 times [2022-11-20 11:19:24,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:24,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472502072] [2022-11-20 11:19:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:24,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:25,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:25,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:25,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472502072] [2022-11-20 11:19:25,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472502072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:25,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:25,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:19:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147417096] [2022-11-20 11:19:25,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:25,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:19:25,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:25,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:19:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:19:25,666 INFO L87 Difference]: Start difference. First operand 289 states and 407 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:27,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:29,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:30,081 INFO L93 Difference]: Finished difference Result 316 states and 439 transitions. [2022-11-20 11:19:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:19:30,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-20 11:19:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:30,086 INFO L225 Difference]: With dead ends: 316 [2022-11-20 11:19:30,087 INFO L226 Difference]: Without dead ends: 308 [2022-11-20 11:19:30,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:19:30,088 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 376 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:30,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 722 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 142 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-11-20 11:19:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-20 11:19:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 300. [2022-11-20 11:19:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 269 states have (on average 1.420074349442379) internal successors, (382), 273 states have internal predecessors, (382), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-20 11:19:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 421 transitions. [2022-11-20 11:19:30,135 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 421 transitions. Word has length 44 [2022-11-20 11:19:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:30,136 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 421 transitions. [2022-11-20 11:19:30,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:30,137 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 421 transitions. [2022-11-20 11:19:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:19:30,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:30,139 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, 1, 1, 1] [2022-11-20 11:19:30,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:19:30,139 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1661089768, now seen corresponding path program 1 times [2022-11-20 11:19:30,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258286000] [2022-11-20 11:19:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:30,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:30,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258286000] [2022-11-20 11:19:30,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258286000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:30,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:30,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:19:30,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903266243] [2022-11-20 11:19:30,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:30,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:19:30,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:19:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:19:30,768 INFO L87 Difference]: Start difference. First operand 300 states and 421 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:32,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:34,106 INFO L93 Difference]: Finished difference Result 316 states and 438 transitions. [2022-11-20 11:19:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:19:34,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 11:19:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:34,109 INFO L225 Difference]: With dead ends: 316 [2022-11-20 11:19:34,109 INFO L226 Difference]: Without dead ends: 308 [2022-11-20 11:19:34,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:19:34,110 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 372 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:34,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 724 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 11:19:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-20 11:19:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 301. [2022-11-20 11:19:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 270 states have (on average 1.4185185185185185) internal successors, (383), 274 states have internal predecessors, (383), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-20 11:19:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 422 transitions. [2022-11-20 11:19:34,153 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 422 transitions. Word has length 45 [2022-11-20 11:19:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:34,153 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 422 transitions. [2022-11-20 11:19:34,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 422 transitions. [2022-11-20 11:19:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:19:34,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:34,155 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, 1, 1, 1] [2022-11-20 11:19:34,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:19:34,156 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1877198546, now seen corresponding path program 1 times [2022-11-20 11:19:34,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:34,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997616913] [2022-11-20 11:19:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:34,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:34,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:19:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:34,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997616913] [2022-11-20 11:19:34,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997616913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:34,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:34,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:19:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512674163] [2022-11-20 11:19:34,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:34,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:19:34,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:19:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:34,451 INFO L87 Difference]: Start difference. First operand 301 states and 422 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:36,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:37,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:38,271 INFO L93 Difference]: Finished difference Result 348 states and 473 transitions. [2022-11-20 11:19:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:19:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 11:19:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:38,274 INFO L225 Difference]: With dead ends: 348 [2022-11-20 11:19:38,275 INFO L226 Difference]: Without dead ends: 289 [2022-11-20 11:19:38,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:19:38,276 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 367 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:38,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 838 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 136 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 11:19:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-20 11:19:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2022-11-20 11:19:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 242 states have (on average 1.4049586776859504) internal successors, (340), 246 states have internal predecessors, (340), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-20 11:19:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 374 transitions. [2022-11-20 11:19:38,320 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 374 transitions. Word has length 45 [2022-11-20 11:19:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:38,321 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 374 transitions. [2022-11-20 11:19:38,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 374 transitions. [2022-11-20 11:19:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:19:38,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:38,323 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, 1, 1, 1] [2022-11-20 11:19:38,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:19:38,324 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash 859522540, now seen corresponding path program 1 times [2022-11-20 11:19:38,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228885724] [2022-11-20 11:19:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:38,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:38,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228885724] [2022-11-20 11:19:38,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228885724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:38,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:38,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:38,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962752852] [2022-11-20 11:19:38,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:38,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:38,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:38,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:38,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:38,841 INFO L87 Difference]: Start difference. First operand 271 states and 374 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:40,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:41,093 INFO L93 Difference]: Finished difference Result 310 states and 423 transitions. [2022-11-20 11:19:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-20 11:19:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:41,097 INFO L225 Difference]: With dead ends: 310 [2022-11-20 11:19:41,097 INFO L226 Difference]: Without dead ends: 269 [2022-11-20 11:19:41,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:41,098 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 305 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:41,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 500 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 11:19:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-20 11:19:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-11-20 11:19:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 240 states have (on average 1.4) internal successors, (336), 244 states have internal predecessors, (336), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-20 11:19:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 370 transitions. [2022-11-20 11:19:41,144 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 370 transitions. Word has length 45 [2022-11-20 11:19:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:41,144 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 370 transitions. [2022-11-20 11:19:41,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 370 transitions. [2022-11-20 11:19:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:19:41,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:41,146 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, 1, 1, 1] [2022-11-20 11:19:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:19:41,147 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash 285533420, now seen corresponding path program 1 times [2022-11-20 11:19:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648970649] [2022-11-20 11:19:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:41,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648970649] [2022-11-20 11:19:41,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648970649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:41,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:41,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:19:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800281340] [2022-11-20 11:19:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:19:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:19:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:19:41,354 INFO L87 Difference]: Start difference. First operand 269 states and 370 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:41,431 INFO L93 Difference]: Finished difference Result 286 states and 391 transitions. [2022-11-20 11:19:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:19:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-20 11:19:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:41,434 INFO L225 Difference]: With dead ends: 286 [2022-11-20 11:19:41,435 INFO L226 Difference]: Without dead ends: 263 [2022-11-20 11:19:41,437 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 [2022-11-20 11:19:41,438 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 285 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:41,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:19:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-20 11:19:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-20 11:19:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 235 states have (on average 1.3872340425531915) internal successors, (326), 238 states have internal predecessors, (326), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-20 11:19:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 359 transitions. [2022-11-20 11:19:41,489 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 359 transitions. Word has length 45 [2022-11-20 11:19:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:41,490 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 359 transitions. [2022-11-20 11:19:41,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 359 transitions. [2022-11-20 11:19:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:19:41,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:41,492 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, 1, 1, 1, 1] [2022-11-20 11:19:41,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:19:41,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash 270131950, now seen corresponding path program 1 times [2022-11-20 11:19:41,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:41,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936275887] [2022-11-20 11:19:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:41,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:41,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:41,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936275887] [2022-11-20 11:19:41,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936275887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:41,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:41,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:19:41,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263436236] [2022-11-20 11:19:41,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:19:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:19:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:19:41,945 INFO L87 Difference]: Start difference. First operand 263 states and 359 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:43,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:44,106 INFO L93 Difference]: Finished difference Result 283 states and 381 transitions. [2022-11-20 11:19:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:19:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-20 11:19:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:44,109 INFO L225 Difference]: With dead ends: 283 [2022-11-20 11:19:44,109 INFO L226 Difference]: Without dead ends: 262 [2022-11-20 11:19:44,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:19:44,110 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 50 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:44,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1444 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:19:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-20 11:19:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-11-20 11:19:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 234 states have (on average 1.3846153846153846) internal successors, (324), 237 states have internal predecessors, (324), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-20 11:19:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 357 transitions. [2022-11-20 11:19:44,153 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 357 transitions. Word has length 46 [2022-11-20 11:19:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:44,154 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 357 transitions. [2022-11-20 11:19:44,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 357 transitions. [2022-11-20 11:19:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:19:44,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:44,156 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, 1, 1, 1, 1, 1] [2022-11-20 11:19:44,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:19:44,156 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1666913919, now seen corresponding path program 1 times [2022-11-20 11:19:44,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:44,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265393550] [2022-11-20 11:19:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:44,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:44,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:44,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:44,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265393550] [2022-11-20 11:19:44,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265393550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:44,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:44,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:19:44,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031577779] [2022-11-20 11:19:44,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:44,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:19:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:19:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:44,448 INFO L87 Difference]: Start difference. First operand 262 states and 357 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:46,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:48,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:48,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:48,678 INFO L93 Difference]: Finished difference Result 502 states and 687 transitions. [2022-11-20 11:19:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:19:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-11-20 11:19:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:48,681 INFO L225 Difference]: With dead ends: 502 [2022-11-20 11:19:48,681 INFO L226 Difference]: Without dead ends: 262 [2022-11-20 11:19:48,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:19:48,683 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 41 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:48,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1026 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 92 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 11:19:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-20 11:19:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2022-11-20 11:19:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 232 states have (on average 1.3836206896551724) internal successors, (321), 235 states have internal predecessors, (321), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-20 11:19:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 354 transitions. [2022-11-20 11:19:48,725 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 354 transitions. Word has length 47 [2022-11-20 11:19:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:48,726 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 354 transitions. [2022-11-20 11:19:48,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 354 transitions. [2022-11-20 11:19:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 11:19:48,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:48,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:48,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:19:48,728 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1795358223, now seen corresponding path program 1 times [2022-11-20 11:19:48,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:48,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401326050] [2022-11-20 11:19:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:48,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:49,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:19:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:49,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:49,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401326050] [2022-11-20 11:19:49,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401326050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:49,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:49,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:19:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335134988] [2022-11-20 11:19:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:49,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:19:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:19:49,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:19:49,137 INFO L87 Difference]: Start difference. First operand 260 states and 354 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:51,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:51,995 INFO L93 Difference]: Finished difference Result 312 states and 413 transitions. [2022-11-20 11:19:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:19:51,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-11-20 11:19:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:51,998 INFO L225 Difference]: With dead ends: 312 [2022-11-20 11:19:51,998 INFO L226 Difference]: Without dead ends: 259 [2022-11-20 11:19:51,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:19:51,999 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 65 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:52,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1288 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 11:19:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-20 11:19:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-11-20 11:19:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 231 states have (on average 1.367965367965368) internal successors, (316), 234 states have internal predecessors, (316), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-20 11:19:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 349 transitions. [2022-11-20 11:19:52,047 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 349 transitions. Word has length 52 [2022-11-20 11:19:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:52,048 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 349 transitions. [2022-11-20 11:19:52,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 349 transitions. [2022-11-20 11:19:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 11:19:52,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:52,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:52,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:19:52,050 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash -18191150, now seen corresponding path program 1 times [2022-11-20 11:19:52,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:52,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808228993] [2022-11-20 11:19:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:52,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:52,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808228993] [2022-11-20 11:19:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808228993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:52,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:52,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:52,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346471393] [2022-11-20 11:19:52,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:52,650 INFO L87 Difference]: Start difference. First operand 259 states and 349 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:52,891 INFO L93 Difference]: Finished difference Result 291 states and 389 transitions. [2022-11-20 11:19:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:52,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-20 11:19:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:52,893 INFO L225 Difference]: With dead ends: 291 [2022-11-20 11:19:52,893 INFO L226 Difference]: Without dead ends: 177 [2022-11-20 11:19:52,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:52,894 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 292 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:52,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 509 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-20 11:19:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2022-11-20 11:19:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 137 states have (on average 1.3211678832116789) internal successors, (181), 140 states have internal predecessors, (181), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-20 11:19:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2022-11-20 11:19:52,923 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 52 [2022-11-20 11:19:52,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:52,923 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2022-11-20 11:19:52,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2022-11-20 11:19:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:19:52,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:52,925 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:52,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 11:19:52,925 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1854339953, now seen corresponding path program 1 times [2022-11-20 11:19:52,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:52,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158060969] [2022-11-20 11:19:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:53,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:19:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:53,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:53,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158060969] [2022-11-20 11:19:53,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158060969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:53,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:53,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:19:53,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364511177] [2022-11-20 11:19:53,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:53,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:19:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:19:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:53,221 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:55,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:55,387 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2022-11-20 11:19:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:19:55,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-11-20 11:19:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:55,389 INFO L225 Difference]: With dead ends: 168 [2022-11-20 11:19:55,390 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 11:19:55,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:19:55,392 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 42 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:55,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 367 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 44 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:19:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 11:19:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-20 11:19:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 112 states have internal predecessors, (142), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 11:19:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2022-11-20 11:19:55,424 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 53 [2022-11-20 11:19:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:55,425 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2022-11-20 11:19:55,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:19:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2022-11-20 11:19:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:19:55,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:55,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:55,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:19:55,429 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1084558305, now seen corresponding path program 1 times [2022-11-20 11:19:55,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:55,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752873963] [2022-11-20 11:19:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:55,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:55,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:19:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:55,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 11:19:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:55,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:55,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752873963] [2022-11-20 11:19:55,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752873963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:55,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:55,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:19:55,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671673679] [2022-11-20 11:19:55,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:55,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:19:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:55,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:19:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:55,716 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:19:57,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:58,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:00,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:00,263 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2022-11-20 11:20:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:20:00,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-20 11:20:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:00,265 INFO L225 Difference]: With dead ends: 173 [2022-11-20 11:20:00,265 INFO L226 Difference]: Without dead ends: 122 [2022-11-20 11:20:00,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:20:00,266 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 33 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:00,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 353 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-20 11:20:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-20 11:20:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-20 11:20:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 108 states have (on average 1.287037037037037) internal successors, (139), 110 states have internal predecessors, (139), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 11:20:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2022-11-20 11:20:00,287 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 55 [2022-11-20 11:20:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:00,287 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2022-11-20 11:20:00,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:20:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2022-11-20 11:20:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 11:20:00,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:00,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:00,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:20:00,289 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash -638228197, now seen corresponding path program 1 times [2022-11-20 11:20:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:00,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710615032] [2022-11-20 11:20:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:00,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:00,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:00,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:00,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710615032] [2022-11-20 11:20:00,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710615032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:00,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:00,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:20:00,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568644895] [2022-11-20 11:20:00,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:00,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:20:00,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:20:00,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:20:00,699 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:20:02,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:02,920 INFO L93 Difference]: Finished difference Result 211 states and 270 transitions. [2022-11-20 11:20:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:20:02,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-11-20 11:20:02,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:02,922 INFO L225 Difference]: With dead ends: 211 [2022-11-20 11:20:02,922 INFO L226 Difference]: Without dead ends: 158 [2022-11-20 11:20:02,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:20:02,923 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 48 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:02,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 555 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 11:20:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-20 11:20:02,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2022-11-20 11:20:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 124 states have internal predecessors, (154), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 11:20:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2022-11-20 11:20:02,948 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 57 [2022-11-20 11:20:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:02,948 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2022-11-20 11:20:02,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:20:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2022-11-20 11:20:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 11:20:02,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:02,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:02,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:20:02,950 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:02,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1799191219, now seen corresponding path program 1 times [2022-11-20 11:20:02,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:02,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733657615] [2022-11-20 11:20:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:02,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:03,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:03,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:03,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:03,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733657615] [2022-11-20 11:20:03,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733657615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:03,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:03,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:20:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005022963] [2022-11-20 11:20:03,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:03,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:20:03,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:20:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:20:03,216 INFO L87 Difference]: Start difference. First operand 138 states and 170 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:20:04,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:04,963 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2022-11-20 11:20:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:20:04,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-11-20 11:20:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:04,965 INFO L225 Difference]: With dead ends: 164 [2022-11-20 11:20:04,965 INFO L226 Difference]: Without dead ends: 161 [2022-11-20 11:20:04,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:20:04,966 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 33 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:04,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 298 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 11:20:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-20 11:20:04,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 142. [2022-11-20 11:20:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 128 states have internal predecessors, (160), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 11:20:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 176 transitions. [2022-11-20 11:20:04,992 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 176 transitions. Word has length 58 [2022-11-20 11:20:04,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:04,993 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 176 transitions. [2022-11-20 11:20:04,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:20:04,993 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 176 transitions. [2022-11-20 11:20:04,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:20:04,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:04,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:04,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:20:04,995 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:04,996 INFO L85 PathProgramCache]: Analyzing trace with hash 297674658, now seen corresponding path program 1 times [2022-11-20 11:20:04,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:04,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7944017] [2022-11-20 11:20:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:04,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:05,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:05,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7944017] [2022-11-20 11:20:05,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7944017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:05,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:05,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:20:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669561678] [2022-11-20 11:20:05,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:05,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:20:05,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:20:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:20:05,375 INFO L87 Difference]: Start difference. First operand 142 states and 176 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:20:07,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:09,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:09,610 INFO L93 Difference]: Finished difference Result 280 states and 346 transitions. [2022-11-20 11:20:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:20:09,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-11-20 11:20:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:09,613 INFO L225 Difference]: With dead ends: 280 [2022-11-20 11:20:09,613 INFO L226 Difference]: Without dead ends: 253 [2022-11-20 11:20:09,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:20:09,614 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 66 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:09,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 373 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 73 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 11:20:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-20 11:20:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 248. [2022-11-20 11:20:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 223 states have (on average 1.2825112107623318) internal successors, (286), 225 states have internal predecessors, (286), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-20 11:20:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 311 transitions. [2022-11-20 11:20:09,689 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 311 transitions. Word has length 60 [2022-11-20 11:20:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:09,690 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 311 transitions. [2022-11-20 11:20:09,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:20:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 311 transitions. [2022-11-20 11:20:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:20:09,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:09,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:09,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 11:20:09,693 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2072682020, now seen corresponding path program 1 times [2022-11-20 11:20:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653491036] [2022-11-20 11:20:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:09,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:10,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:10,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:10,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653491036] [2022-11-20 11:20:10,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653491036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:10,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:10,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:20:10,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223688230] [2022-11-20 11:20:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:10,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:20:10,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:20:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:20:10,372 INFO L87 Difference]: Start difference. First operand 248 states and 311 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:20:11,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:11,707 INFO L93 Difference]: Finished difference Result 334 states and 421 transitions. [2022-11-20 11:20:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:20:11,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2022-11-20 11:20:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:11,709 INFO L225 Difference]: With dead ends: 334 [2022-11-20 11:20:11,709 INFO L226 Difference]: Without dead ends: 234 [2022-11-20 11:20:11,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:20:11,711 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 29 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:11,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 483 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:20:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-20 11:20:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-11-20 11:20:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 209 states have (on average 1.2727272727272727) internal successors, (266), 211 states have internal predecessors, (266), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-20 11:20:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 291 transitions. [2022-11-20 11:20:11,759 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 291 transitions. Word has length 60 [2022-11-20 11:20:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:11,759 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 291 transitions. [2022-11-20 11:20:11,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:20:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 291 transitions. [2022-11-20 11:20:11,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 11:20:11,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:11,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:11,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 11:20:11,761 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash -348106787, now seen corresponding path program 1 times [2022-11-20 11:20:11,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:11,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291819613] [2022-11-20 11:20:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:11,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291819613] [2022-11-20 11:20:12,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291819613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:12,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:12,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:20:12,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762030923] [2022-11-20 11:20:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:12,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:20:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:20:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:20:12,465 INFO L87 Difference]: Start difference. First operand 234 states and 291 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:20:14,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:16,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:17,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:17,995 INFO L93 Difference]: Finished difference Result 308 states and 389 transitions. [2022-11-20 11:20:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:20:17,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-11-20 11:20:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:17,997 INFO L225 Difference]: With dead ends: 308 [2022-11-20 11:20:17,997 INFO L226 Difference]: Without dead ends: 222 [2022-11-20 11:20:17,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:20:17,999 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 104 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:17,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 467 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-20 11:20:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-20 11:20:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-11-20 11:20:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 199 states have (on average 1.2663316582914572) internal successors, (252), 201 states have internal predecessors, (252), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-20 11:20:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 275 transitions. [2022-11-20 11:20:18,048 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 275 transitions. Word has length 64 [2022-11-20 11:20:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:18,048 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 275 transitions. [2022-11-20 11:20:18,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:20:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 275 transitions. [2022-11-20 11:20:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 11:20:18,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:18,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:18,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 11:20:18,051 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1912276345, now seen corresponding path program 1 times [2022-11-20 11:20:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:18,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127203173] [2022-11-20 11:20:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:18,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:18,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127203173] [2022-11-20 11:20:18,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127203173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:18,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:18,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:20:18,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660457357] [2022-11-20 11:20:18,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:18,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:20:18,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:18,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:20:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:20:18,740 INFO L87 Difference]: Start difference. First operand 222 states and 275 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:20:20,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:21,056 INFO L93 Difference]: Finished difference Result 285 states and 349 transitions. [2022-11-20 11:20:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:20:21,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2022-11-20 11:20:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:21,059 INFO L225 Difference]: With dead ends: 285 [2022-11-20 11:20:21,059 INFO L226 Difference]: Without dead ends: 258 [2022-11-20 11:20:21,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:20:21,060 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 54 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:21,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 739 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 188 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 11:20:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-20 11:20:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 238. [2022-11-20 11:20:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 213 states have (on average 1.2582159624413145) internal successors, (268), 215 states have internal predecessors, (268), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-20 11:20:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 293 transitions. [2022-11-20 11:20:21,109 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 293 transitions. Word has length 66 [2022-11-20 11:20:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:21,110 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 293 transitions. [2022-11-20 11:20:21,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:20:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 293 transitions. [2022-11-20 11:20:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 11:20:21,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:21,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:21,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 11:20:21,112 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1012218945, now seen corresponding path program 1 times [2022-11-20 11:20:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:21,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35530446] [2022-11-20 11:20:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:21,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:21,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:21,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:21,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:21,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35530446] [2022-11-20 11:20:21,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35530446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:21,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:21,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:20:21,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308952537] [2022-11-20 11:20:21,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:21,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:20:21,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:20:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:20:21,519 INFO L87 Difference]: Start difference. First operand 238 states and 293 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:20:23,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:25,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:26,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:26,926 INFO L93 Difference]: Finished difference Result 323 states and 389 transitions. [2022-11-20 11:20:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:20:26,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-11-20 11:20:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:26,929 INFO L225 Difference]: With dead ends: 323 [2022-11-20 11:20:26,929 INFO L226 Difference]: Without dead ends: 263 [2022-11-20 11:20:26,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:20:26,930 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 68 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:26,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 334 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 68 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-20 11:20:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-20 11:20:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 245. [2022-11-20 11:20:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 219 states have (on average 1.2100456621004567) internal successors, (265), 221 states have internal predecessors, (265), 11 states have call successors, (11), 10 states have call predecessors, (11), 14 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-20 11:20:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 291 transitions. [2022-11-20 11:20:26,979 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 291 transitions. Word has length 65 [2022-11-20 11:20:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:26,980 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 291 transitions. [2022-11-20 11:20:26,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:20:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 291 transitions. [2022-11-20 11:20:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:20:26,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:26,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:26,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 11:20:26,982 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash 528509620, now seen corresponding path program 1 times [2022-11-20 11:20:26,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:26,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832389599] [2022-11-20 11:20:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:26,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:27,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832389599] [2022-11-20 11:20:27,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832389599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:27,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:27,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:20:27,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27110818] [2022-11-20 11:20:27,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:27,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:20:27,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:20:27,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:20:27,699 INFO L87 Difference]: Start difference. First operand 245 states and 291 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:20:29,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:31,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:31,978 INFO L93 Difference]: Finished difference Result 334 states and 396 transitions. [2022-11-20 11:20:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:20:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2022-11-20 11:20:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:31,980 INFO L225 Difference]: With dead ends: 334 [2022-11-20 11:20:31,980 INFO L226 Difference]: Without dead ends: 255 [2022-11-20 11:20:31,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:20:31,981 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 51 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:31,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 726 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 11:20:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-20 11:20:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 235. [2022-11-20 11:20:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 211 states have (on average 1.1895734597156398) internal successors, (251), 213 states have internal predecessors, (251), 11 states have call successors, (11), 10 states have call predecessors, (11), 12 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-20 11:20:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 275 transitions. [2022-11-20 11:20:32,025 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 275 transitions. Word has length 67 [2022-11-20 11:20:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:32,026 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 275 transitions. [2022-11-20 11:20:32,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:20:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 275 transitions. [2022-11-20 11:20:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 11:20:32,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:32,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:32,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 11:20:32,030 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:32,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2036393244, now seen corresponding path program 1 times [2022-11-20 11:20:32,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:32,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223214466] [2022-11-20 11:20:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:32,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:32,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:32,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:32,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:32,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:32,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223214466] [2022-11-20 11:20:32,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223214466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:32,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:32,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:20:32,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104260] [2022-11-20 11:20:32,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:32,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:20:32,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:32,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:20:32,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:20:32,342 INFO L87 Difference]: Start difference. First operand 235 states and 275 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:20:33,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:35,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:37,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:37,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:37,704 INFO L93 Difference]: Finished difference Result 269 states and 312 transitions. [2022-11-20 11:20:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:20:37,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 73 [2022-11-20 11:20:37,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:37,706 INFO L225 Difference]: With dead ends: 269 [2022-11-20 11:20:37,706 INFO L226 Difference]: Without dead ends: 214 [2022-11-20 11:20:37,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:20:37,708 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 22 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:37,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 342 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-20 11:20:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-20 11:20:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2022-11-20 11:20:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 176 states have (on average 1.1647727272727273) internal successors, (205), 176 states have internal predecessors, (205), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 11:20:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2022-11-20 11:20:37,746 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 73 [2022-11-20 11:20:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:37,746 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2022-11-20 11:20:37,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:20:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2022-11-20 11:20:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 11:20:37,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:37,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:37,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 11:20:37,749 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -757897048, now seen corresponding path program 1 times [2022-11-20 11:20:37,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:37,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324468474] [2022-11-20 11:20:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:37,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:38,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:38,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:38,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:38,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-20 11:20:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:38,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:38,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324468474] [2022-11-20 11:20:38,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324468474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:38,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:38,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:20:38,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111006190] [2022-11-20 11:20:38,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:38,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:20:38,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:38,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:20:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:20:38,494 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:20:40,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:41,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:43,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:43,731 INFO L93 Difference]: Finished difference Result 218 states and 248 transitions. [2022-11-20 11:20:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:20:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 81 [2022-11-20 11:20:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:43,733 INFO L225 Difference]: With dead ends: 218 [2022-11-20 11:20:43,733 INFO L226 Difference]: Without dead ends: 178 [2022-11-20 11:20:43,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:20:43,734 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 60 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:43,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 740 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 216 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-20 11:20:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-20 11:20:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-11-20 11:20:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 160 states have (on average 1.16875) internal successors, (187), 160 states have internal predecessors, (187), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-20 11:20:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 204 transitions. [2022-11-20 11:20:43,772 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 204 transitions. Word has length 81 [2022-11-20 11:20:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:43,772 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 204 transitions. [2022-11-20 11:20:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:20:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 204 transitions. [2022-11-20 11:20:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 11:20:43,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:43,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:43,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 11:20:43,775 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:43,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:43,775 INFO L85 PathProgramCache]: Analyzing trace with hash 673566211, now seen corresponding path program 1 times [2022-11-20 11:20:43,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:43,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292249308] [2022-11-20 11:20:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:43,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:44,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:44,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:44,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:44,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-20 11:20:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:44,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:44,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292249308] [2022-11-20 11:20:44,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292249308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:44,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:44,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:20:44,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005828173] [2022-11-20 11:20:44,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:44,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:20:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:20:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:20:44,390 INFO L87 Difference]: Start difference. First operand 178 states and 204 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:20:46,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:48,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:50,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:50,401 INFO L93 Difference]: Finished difference Result 196 states and 223 transitions. [2022-11-20 11:20:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:20:50,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 81 [2022-11-20 11:20:50,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:50,403 INFO L225 Difference]: With dead ends: 196 [2022-11-20 11:20:50,403 INFO L226 Difference]: Without dead ends: 178 [2022-11-20 11:20:50,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:20:50,405 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 47 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:50,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 505 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 117 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-11-20 11:20:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-20 11:20:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2022-11-20 11:20:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 158 states have (on average 1.1582278481012658) internal successors, (183), 158 states have internal predecessors, (183), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-20 11:20:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 200 transitions. [2022-11-20 11:20:50,443 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 200 transitions. Word has length 81 [2022-11-20 11:20:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:50,443 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 200 transitions. [2022-11-20 11:20:50,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:20:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 200 transitions. [2022-11-20 11:20:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 11:20:50,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:50,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:50,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 11:20:50,446 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1212661292, now seen corresponding path program 1 times [2022-11-20 11:20:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:50,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036916893] [2022-11-20 11:20:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:50,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:50,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:50,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:50,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:50,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:20:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:50,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:50,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036916893] [2022-11-20 11:20:50,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036916893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:50,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:50,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:20:50,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052858970] [2022-11-20 11:20:50,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:50,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:20:50,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:20:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:20:50,972 INFO L87 Difference]: Start difference. First operand 176 states and 200 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:20:52,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:53,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:55,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:55,813 INFO L93 Difference]: Finished difference Result 226 states and 253 transitions. [2022-11-20 11:20:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:20:55,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 82 [2022-11-20 11:20:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:55,815 INFO L225 Difference]: With dead ends: 226 [2022-11-20 11:20:55,815 INFO L226 Difference]: Without dead ends: 152 [2022-11-20 11:20:55,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:20:55,817 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 15 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:55,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 664 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 11:20:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-20 11:20:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-20 11:20:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 136 states have (on average 1.1102941176470589) internal successors, (151), 136 states have internal predecessors, (151), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:20:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-11-20 11:20:55,857 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 82 [2022-11-20 11:20:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:55,857 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-11-20 11:20:55,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:20:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-11-20 11:20:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:20:55,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:55,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:55,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 11:20:55,859 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash -716140786, now seen corresponding path program 1 times [2022-11-20 11:20:55,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:55,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924388931] [2022-11-20 11:20:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:55,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:57,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:20:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:57,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:57,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:57,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 11:20:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:57,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924388931] [2022-11-20 11:20:57,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924388931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:57,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:57,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:20:57,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951749227] [2022-11-20 11:20:57,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:57,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:20:57,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:20:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:20:57,318 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:20:59,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:21:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:00,356 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2022-11-20 11:21:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:21:00,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 87 [2022-11-20 11:21:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:00,358 INFO L225 Difference]: With dead ends: 284 [2022-11-20 11:21:00,358 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 11:21:00,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:21:00,360 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 21 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:00,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 308 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 11:21:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 11:21:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-11-20 11:21:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 138 states have (on average 1.108695652173913) internal successors, (153), 138 states have internal predecessors, (153), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:21:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2022-11-20 11:21:00,394 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 87 [2022-11-20 11:21:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:00,395 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2022-11-20 11:21:00,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:21:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2022-11-20 11:21:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 11:21:00,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:00,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:00,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-20 11:21:00,397 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash -447625103, now seen corresponding path program 1 times [2022-11-20 11:21:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:00,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406006822] [2022-11-20 11:21:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:01,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 11:21:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:01,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:21:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:01,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:21:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:01,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 11:21:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:01,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406006822] [2022-11-20 11:21:01,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406006822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389462080] [2022-11-20 11:21:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:01,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:01,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:21:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:03,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:21:03,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:04,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:04,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389462080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:04,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:04,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-11-20 11:21:04,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863883810] [2022-11-20 11:21:04,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:04,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:21:04,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:21:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:21:04,154 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 11:21:06,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:21:08,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:21:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:08,512 INFO L93 Difference]: Finished difference Result 290 states and 319 transitions. [2022-11-20 11:21:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:21:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2022-11-20 11:21:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:08,514 INFO L225 Difference]: With dead ends: 290 [2022-11-20 11:21:08,514 INFO L226 Difference]: Without dead ends: 160 [2022-11-20 11:21:08,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:21:08,515 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 72 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:08,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 505 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 11:21:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-20 11:21:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-20 11:21:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 144 states have internal predecessors, (159), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:21:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 174 transitions. [2022-11-20 11:21:08,572 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 174 transitions. Word has length 88 [2022-11-20 11:21:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:08,572 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 174 transitions. [2022-11-20 11:21:08,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 11:21:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 174 transitions. [2022-11-20 11:21:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 11:21:08,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:08,574 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:08,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:21:08,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:08,795 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1753567182, now seen corresponding path program 2 times [2022-11-20 11:21:08,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:08,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227695049] [2022-11-20 11:21:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:08,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:10,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-20 11:21:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:10,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:21:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:10,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:21:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:10,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:21:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:10,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227695049] [2022-11-20 11:21:10,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227695049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431215260] [2022-11-20 11:21:10,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:21:10,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:10,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:10,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:10,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:21:12,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:21:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:12,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:21:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:21:12,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:12,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431215260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:12,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:21:12,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-20 11:21:12,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424826825] [2022-11-20 11:21:12,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:12,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:21:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:21:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:21:12,635 INFO L87 Difference]: Start difference. First operand 160 states and 174 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 11:21:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:12,766 INFO L93 Difference]: Finished difference Result 258 states and 277 transitions. [2022-11-20 11:21:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:21:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 91 [2022-11-20 11:21:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:12,768 INFO L225 Difference]: With dead ends: 258 [2022-11-20 11:21:12,768 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 11:21:12,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:21:12,770 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 187 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 [2022-11-20 11:21:12,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 187 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:21:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 11:21:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-20 11:21:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 146 states have (on average 1.1027397260273972) internal successors, (161), 146 states have internal predecessors, (161), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:21:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 176 transitions. [2022-11-20 11:21:12,829 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 176 transitions. Word has length 91 [2022-11-20 11:21:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:12,829 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 176 transitions. [2022-11-20 11:21:12,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 11:21:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 176 transitions. [2022-11-20 11:21:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 11:21:12,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:12,831 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:12,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:13,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 11:21:13,055 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 859393369, now seen corresponding path program 1 times [2022-11-20 11:21:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:13,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424033289] [2022-11-20 11:21:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:13,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:14,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:21:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:14,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:21:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:14,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:21:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:14,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-20 11:21:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:21:14,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424033289] [2022-11-20 11:21:14,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424033289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755437543] [2022-11-20 11:21:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:14,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:14,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:14,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:14,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:21:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:16,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:21:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:21:16,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:16,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755437543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:16,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:21:16,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-20 11:21:16,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638043491] [2022-11-20 11:21:16,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:16,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:21:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:21:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:21:16,533 INFO L87 Difference]: Start difference. First operand 162 states and 176 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 11:21:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:16,648 INFO L93 Difference]: Finished difference Result 264 states and 285 transitions. [2022-11-20 11:21:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:21:16,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 92 [2022-11-20 11:21:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:16,650 INFO L225 Difference]: With dead ends: 264 [2022-11-20 11:21:16,650 INFO L226 Difference]: Without dead ends: 164 [2022-11-20 11:21:16,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:21:16,652 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:16,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 287 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:21:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-20 11:21:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-11-20 11:21:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 148 states have (on average 1.1013513513513513) internal successors, (163), 148 states have internal predecessors, (163), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:21:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2022-11-20 11:21:16,698 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 92 [2022-11-20 11:21:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:16,698 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2022-11-20 11:21:16,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 11:21:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2022-11-20 11:21:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-20 11:21:16,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:16,700 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:16,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:21:16,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 11:21:16,920 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash 839553712, now seen corresponding path program 1 times [2022-11-20 11:21:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:16,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312383059] [2022-11-20 11:21:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:16,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:18,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-20 11:21:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:18,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:21:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:18,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:21:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:18,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-20 11:21:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:21:18,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:18,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312383059] [2022-11-20 11:21:18,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312383059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:18,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918199531] [2022-11-20 11:21:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:18,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:18,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:18,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:18,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:21:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:20,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:21:20,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:21:20,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:21:21,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918199531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:21,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:21,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-11-20 11:21:21,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430927646] [2022-11-20 11:21:21,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:21,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:21:21,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:21:21,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:21:21,057 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 16 states have internal predecessors, (119), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 11:21:23,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:21:25,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:21:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:26,122 INFO L93 Difference]: Finished difference Result 310 states and 345 transitions. [2022-11-20 11:21:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:21:26,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 16 states have internal predecessors, (119), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2022-11-20 11:21:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:26,124 INFO L225 Difference]: With dead ends: 310 [2022-11-20 11:21:26,124 INFO L226 Difference]: Without dead ends: 176 [2022-11-20 11:21:26,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:21:26,125 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 21 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 27 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:26,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 812 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 185 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-11-20 11:21:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-20 11:21:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-11-20 11:21:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 160 states have (on average 1.09375) internal successors, (175), 160 states have internal predecessors, (175), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:21:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2022-11-20 11:21:26,182 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 93 [2022-11-20 11:21:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:26,182 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2022-11-20 11:21:26,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 16 states have internal predecessors, (119), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 11:21:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2022-11-20 11:21:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 11:21:26,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:26,184 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:26,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:26,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 11:21:26,399 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1195309008, now seen corresponding path program 2 times [2022-11-20 11:21:26,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:26,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123633345] [2022-11-20 11:21:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:26,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:28,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-20 11:21:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:28,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:21:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:28,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:21:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:28,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-20 11:21:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:21:28,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:28,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123633345] [2022-11-20 11:21:28,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123633345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:28,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351565311] [2022-11-20 11:21:28,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:21:28,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:28,222 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:28,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e90c2090-0e6b-4162-bf5d-39211c259513/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process