./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y --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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:45:56,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:45:56,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:45:56,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:45:56,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:45:56,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:45:56,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:45:56,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:45:56,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:45:56,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:45:56,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:45:56,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:45:56,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:45:56,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:45:56,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:45:56,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:45:56,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:45:56,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:45:56,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:45:56,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:45:56,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:45:56,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:45:56,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:45:56,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:45:56,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:45:56,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:45:56,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:45:56,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:45:56,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:45:56,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:45:56,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:45:56,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:45:56,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:45:56,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:45:56,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:45:56,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:45:56,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:45:56,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:45:56,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:45:56,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:45:56,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:45:56,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:45:56,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:45:56,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:45:56,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:45:56,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:45:56,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:45:56,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:45:56,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:45:56,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:45:56,950 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:45:56,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:45:56,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:45:56,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:45:56,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:45:56,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:45:56,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:45:56,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:45:56,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:45:56,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:45:56,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:45:56,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:45:56,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:45:56,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:45:56,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:45:56,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:45:56,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:45:56,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:45:56,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:45:56,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:45:56,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:45:56,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:45:56,961 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:45:56,962 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:45:56,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:45:56,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:45:56,963 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_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-13 17:45:57,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:45:57,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:45:57,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:45:57,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:45:57,384 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:45:57,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-13 17:45:57,470 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data/442956515/5a9ad3d258484075ae9f6b5c4e8764be/FLAG52e2a554b [2021-11-13 17:45:58,342 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:45:58,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-13 17:45:58,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data/442956515/5a9ad3d258484075ae9f6b5c4e8764be/FLAG52e2a554b [2021-11-13 17:45:58,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data/442956515/5a9ad3d258484075ae9f6b5c4e8764be [2021-11-13 17:45:58,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:45:58,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:45:58,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:45:58,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:45:58,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:45:58,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:45:58" (1/1) ... [2021-11-13 17:45:58,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3d6fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:58, skipping insertion in model container [2021-11-13 17:45:58,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:45:58" (1/1) ... [2021-11-13 17:45:58,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:45:58,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:45:59,208 WARN L228 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_02035cf3-06a2-4caf-97d4-89d55930c95d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-13 17:45:59,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:45:59,255 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:45:59,447 WARN L228 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_02035cf3-06a2-4caf-97d4-89d55930c95d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-13 17:45:59,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:45:59,473 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:45:59,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59 WrapperNode [2021-11-13 17:45:59,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:45:59,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:45:59,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:45:59,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:45:59,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:45:59,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:45:59,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:45:59,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:45:59,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:45:59,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:45:59,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:45:59,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:45:59,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (1/1) ... [2021-11-13 17:45:59,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:45:59,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:59,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:45:59,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:45:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:45:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:45:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:45:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:45:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:45:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:45:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:45:59,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:45:59,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:46:00,158 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-13 17:46:03,626 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-13 17:46:03,626 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-13 17:46:03,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:46:03,645 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:46:03,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:46:03 BoogieIcfgContainer [2021-11-13 17:46:03,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:46:03,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:46:03,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:46:03,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:46:03,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:45:58" (1/3) ... [2021-11-13 17:46:03,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b74993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:46:03, skipping insertion in model container [2021-11-13 17:46:03,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:59" (2/3) ... [2021-11-13 17:46:03,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b74993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:46:03, skipping insertion in model container [2021-11-13 17:46:03,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:46:03" (3/3) ... [2021-11-13 17:46:03,664 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2021-11-13 17:46:03,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:46:03,672 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:46:03,761 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:46:03,775 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:46:03,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:46:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 17:46:03,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:03,836 INFO L514 BasicCegarLoop]: 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] [2021-11-13 17:46:03,836 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2021-11-13 17:46:03,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:03,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667951248] [2021-11-13 17:46:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:03,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:04,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:04,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667951248] [2021-11-13 17:46:04,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667951248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:04,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:04,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:04,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375344385] [2021-11-13 17:46:04,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:04,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:04,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:04,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:04,446 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:06,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:07,225 INFO L93 Difference]: Finished difference Result 315 states and 530 transitions. [2021-11-13 17:46:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:07,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-13 17:46:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:07,242 INFO L225 Difference]: With dead ends: 315 [2021-11-13 17:46:07,243 INFO L226 Difference]: Without dead ends: 160 [2021-11-13 17:46:07,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:07,251 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 36 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2499.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.70ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2650.02ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:07,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 555 Invalid, 166 Unknown, 0 Unchecked, 11.70ms Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2650.02ms Time] [2021-11-13 17:46:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-13 17:46:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-11-13 17:46:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5422535211267605) internal successors, (219), 142 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 219 transitions. [2021-11-13 17:46:07,311 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 219 transitions. Word has length 47 [2021-11-13 17:46:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:07,312 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 219 transitions. [2021-11-13 17:46:07,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 219 transitions. [2021-11-13 17:46:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 17:46:07,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:07,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:07,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:46:07,318 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1861384675, now seen corresponding path program 1 times [2021-11-13 17:46:07,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:07,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599551719] [2021-11-13 17:46:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:07,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:07,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:07,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599551719] [2021-11-13 17:46:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599551719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:07,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:07,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:07,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944037095] [2021-11-13 17:46:07,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:07,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:07,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:07,538 INFO L87 Difference]: Start difference. First operand 143 states and 219 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:09,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:10,099 INFO L93 Difference]: Finished difference Result 282 states and 426 transitions. [2021-11-13 17:46:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-13 17:46:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:10,103 INFO L225 Difference]: With dead ends: 282 [2021-11-13 17:46:10,103 INFO L226 Difference]: Without dead ends: 160 [2021-11-13 17:46:10,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:10,106 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 24 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2415.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.69ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2521.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:10,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 441 Invalid, 157 Unknown, 0 Unchecked, 4.69ms Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2521.63ms Time] [2021-11-13 17:46:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-13 17:46:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-11-13 17:46:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5352112676056338) internal successors, (218), 142 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 218 transitions. [2021-11-13 17:46:10,125 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 218 transitions. Word has length 60 [2021-11-13 17:46:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:10,126 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 218 transitions. [2021-11-13 17:46:10,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 218 transitions. [2021-11-13 17:46:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 17:46:10,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:10,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:10,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:46:10,131 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2019107822, now seen corresponding path program 1 times [2021-11-13 17:46:10,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:10,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143636434] [2021-11-13 17:46:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:10,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:10,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:10,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143636434] [2021-11-13 17:46:10,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143636434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:10,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:10,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:10,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362005709] [2021-11-13 17:46:10,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:10,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:10,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:10,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:10,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:10,293 INFO L87 Difference]: Start difference. First operand 143 states and 218 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:12,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:12,799 INFO L93 Difference]: Finished difference Result 281 states and 424 transitions. [2021-11-13 17:46:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:12,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-13 17:46:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:12,803 INFO L225 Difference]: With dead ends: 281 [2021-11-13 17:46:12,803 INFO L226 Difference]: Without dead ends: 159 [2021-11-13 17:46:12,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:12,806 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 28 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2380.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2467.89ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:12,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2467.89ms Time] [2021-11-13 17:46:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-13 17:46:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2021-11-13 17:46:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.528169014084507) internal successors, (217), 142 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 217 transitions. [2021-11-13 17:46:12,823 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 217 transitions. Word has length 61 [2021-11-13 17:46:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:12,824 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 217 transitions. [2021-11-13 17:46:12,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 217 transitions. [2021-11-13 17:46:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 17:46:12,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:12,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:12,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:46:12,829 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1437848702, now seen corresponding path program 1 times [2021-11-13 17:46:12,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:12,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490291561] [2021-11-13 17:46:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:12,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:12,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:12,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490291561] [2021-11-13 17:46:12,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490291561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:12,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:12,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:12,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604691207] [2021-11-13 17:46:12,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:12,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:12,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:12,984 INFO L87 Difference]: Start difference. First operand 143 states and 217 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:14,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:15,473 INFO L93 Difference]: Finished difference Result 281 states and 423 transitions. [2021-11-13 17:46:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-13 17:46:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:15,476 INFO L225 Difference]: With dead ends: 281 [2021-11-13 17:46:15,476 INFO L226 Difference]: Without dead ends: 159 [2021-11-13 17:46:15,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:15,479 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 26 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2375.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.40ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2458.03ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:15,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 4.40ms Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2458.03ms Time] [2021-11-13 17:46:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-13 17:46:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2021-11-13 17:46:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5211267605633803) internal successors, (216), 142 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 216 transitions. [2021-11-13 17:46:15,509 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 216 transitions. Word has length 61 [2021-11-13 17:46:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:15,510 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 216 transitions. [2021-11-13 17:46:15,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 216 transitions. [2021-11-13 17:46:15,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 17:46:15,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:15,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:15,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:46:15,526 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 16682137, now seen corresponding path program 1 times [2021-11-13 17:46:15,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:15,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776503715] [2021-11-13 17:46:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:15,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:15,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:15,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776503715] [2021-11-13 17:46:15,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776503715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:15,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:15,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:15,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353547161] [2021-11-13 17:46:15,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:15,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:15,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:15,666 INFO L87 Difference]: Start difference. First operand 143 states and 216 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:17,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:18,119 INFO L93 Difference]: Finished difference Result 280 states and 421 transitions. [2021-11-13 17:46:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:18,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-13 17:46:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:18,122 INFO L225 Difference]: With dead ends: 280 [2021-11-13 17:46:18,122 INFO L226 Difference]: Without dead ends: 158 [2021-11-13 17:46:18,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:18,124 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 19 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2338.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.69ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2422.43ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:18,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 445 Invalid, 152 Unknown, 0 Unchecked, 3.69ms Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2422.43ms Time] [2021-11-13 17:46:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-13 17:46:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 143. [2021-11-13 17:46:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5140845070422535) internal successors, (215), 142 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 215 transitions. [2021-11-13 17:46:18,158 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 215 transitions. Word has length 61 [2021-11-13 17:46:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 215 transitions. [2021-11-13 17:46:18,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 215 transitions. [2021-11-13 17:46:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 17:46:18,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:18,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:18,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:46:18,169 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:18,170 INFO L85 PathProgramCache]: Analyzing trace with hash -932666023, now seen corresponding path program 1 times [2021-11-13 17:46:18,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:18,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152727272] [2021-11-13 17:46:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:18,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:18,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:18,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152727272] [2021-11-13 17:46:18,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152727272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:18,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:18,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:18,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700663250] [2021-11-13 17:46:18,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:18,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:18,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:18,294 INFO L87 Difference]: Start difference. First operand 143 states and 215 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:20,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:20,721 INFO L93 Difference]: Finished difference Result 278 states and 418 transitions. [2021-11-13 17:46:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-13 17:46:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:20,724 INFO L225 Difference]: With dead ends: 278 [2021-11-13 17:46:20,724 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 17:46:20,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:20,726 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 19 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2319.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.57ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2398.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:20,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 3.57ms Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2398.35ms Time] [2021-11-13 17:46:20,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 17:46:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2021-11-13 17:46:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5070422535211268) internal successors, (214), 142 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 214 transitions. [2021-11-13 17:46:20,742 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 214 transitions. Word has length 61 [2021-11-13 17:46:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:20,743 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 214 transitions. [2021-11-13 17:46:20,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 214 transitions. [2021-11-13 17:46:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 17:46:20,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:20,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:20,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:46:20,746 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1300462214, now seen corresponding path program 1 times [2021-11-13 17:46:20,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:20,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731643805] [2021-11-13 17:46:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:20,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:20,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:20,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731643805] [2021-11-13 17:46:20,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731643805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:20,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:20,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:20,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429192513] [2021-11-13 17:46:20,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:20,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:20,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:20,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:20,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:20,884 INFO L87 Difference]: Start difference. First operand 143 states and 214 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:22,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:23,303 INFO L93 Difference]: Finished difference Result 278 states and 417 transitions. [2021-11-13 17:46:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:23,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-13 17:46:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:23,305 INFO L225 Difference]: With dead ends: 278 [2021-11-13 17:46:23,306 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 17:46:23,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:23,307 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 22 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2322.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.44ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2393.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:23,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 3.44ms Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2393.51ms Time] [2021-11-13 17:46:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 17:46:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2021-11-13 17:46:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5) internal successors, (213), 142 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 213 transitions. [2021-11-13 17:46:23,317 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 213 transitions. Word has length 62 [2021-11-13 17:46:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:23,317 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 213 transitions. [2021-11-13 17:46:23,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 213 transitions. [2021-11-13 17:46:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 17:46:23,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:23,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:23,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:46:23,320 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash 249957895, now seen corresponding path program 1 times [2021-11-13 17:46:23,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:23,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925779776] [2021-11-13 17:46:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:23,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:23,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:23,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925779776] [2021-11-13 17:46:23,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925779776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:23,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:23,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:23,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412371957] [2021-11-13 17:46:23,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:23,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:23,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:23,464 INFO L87 Difference]: Start difference. First operand 143 states and 213 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:25,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:25,864 INFO L93 Difference]: Finished difference Result 278 states and 416 transitions. [2021-11-13 17:46:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-13 17:46:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:25,868 INFO L225 Difference]: With dead ends: 278 [2021-11-13 17:46:25,868 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 17:46:25,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:25,870 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 20 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2276.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2346.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:25,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2346.61ms Time] [2021-11-13 17:46:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 17:46:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2021-11-13 17:46:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4929577464788732) internal successors, (212), 142 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 212 transitions. [2021-11-13 17:46:25,879 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 212 transitions. Word has length 63 [2021-11-13 17:46:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:25,879 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 212 transitions. [2021-11-13 17:46:25,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 212 transitions. [2021-11-13 17:46:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 17:46:25,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:25,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:25,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:46:25,882 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:25,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2005265579, now seen corresponding path program 1 times [2021-11-13 17:46:25,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:25,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731994016] [2021-11-13 17:46:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:25,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:25,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:25,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731994016] [2021-11-13 17:46:25,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731994016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:25,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:25,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:25,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019730322] [2021-11-13 17:46:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:25,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:25,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:25,978 INFO L87 Difference]: Start difference. First operand 143 states and 212 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:27,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:28,357 INFO L93 Difference]: Finished difference Result 268 states and 402 transitions. [2021-11-13 17:46:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:28,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-13 17:46:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:28,360 INFO L225 Difference]: With dead ends: 268 [2021-11-13 17:46:28,360 INFO L226 Difference]: Without dead ends: 146 [2021-11-13 17:46:28,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:28,361 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2281.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.91ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2354.64ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:28,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 129 Unknown, 0 Unchecked, 2.91ms Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2354.64ms Time] [2021-11-13 17:46:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-13 17:46:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2021-11-13 17:46:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 142 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 211 transitions. [2021-11-13 17:46:28,370 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 211 transitions. Word has length 64 [2021-11-13 17:46:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:28,370 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 211 transitions. [2021-11-13 17:46:28,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 211 transitions. [2021-11-13 17:46:28,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 17:46:28,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:28,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:28,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:46:28,373 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1889550317, now seen corresponding path program 1 times [2021-11-13 17:46:28,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:28,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783109555] [2021-11-13 17:46:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:28,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:28,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:28,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783109555] [2021-11-13 17:46:28,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783109555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:28,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:28,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:28,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267584130] [2021-11-13 17:46:28,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:28,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:28,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:28,475 INFO L87 Difference]: Start difference. First operand 143 states and 211 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:30,489 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:30,933 INFO L93 Difference]: Finished difference Result 309 states and 465 transitions. [2021-11-13 17:46:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:30,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-13 17:46:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:30,936 INFO L225 Difference]: With dead ends: 309 [2021-11-13 17:46:30,936 INFO L226 Difference]: Without dead ends: 187 [2021-11-13 17:46:30,937 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:30,939 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 36 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2325.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.00ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2426.32ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:30,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 461 Invalid, 177 Unknown, 0 Unchecked, 4.00ms Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2426.32ms Time] [2021-11-13 17:46:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-13 17:46:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 165. [2021-11-13 17:46:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5182926829268293) internal successors, (249), 164 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 249 transitions. [2021-11-13 17:46:30,952 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 249 transitions. Word has length 64 [2021-11-13 17:46:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:30,953 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 249 transitions. [2021-11-13 17:46:30,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 249 transitions. [2021-11-13 17:46:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 17:46:30,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:30,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:30,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:46:30,956 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1893437081, now seen corresponding path program 1 times [2021-11-13 17:46:30,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:30,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667068203] [2021-11-13 17:46:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:30,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:31,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:31,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667068203] [2021-11-13 17:46:31,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667068203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:31,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:31,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:31,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984629279] [2021-11-13 17:46:31,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:31,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:31,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:31,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:31,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:31,109 INFO L87 Difference]: Start difference. First operand 165 states and 249 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:33,121 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:33,540 INFO L93 Difference]: Finished difference Result 331 states and 502 transitions. [2021-11-13 17:46:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-13 17:46:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:33,543 INFO L225 Difference]: With dead ends: 331 [2021-11-13 17:46:33,543 INFO L226 Difference]: Without dead ends: 187 [2021-11-13 17:46:33,544 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:33,545 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 41 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2304.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.10ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2405.56ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:33,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 461 Invalid, 176 Unknown, 0 Unchecked, 3.10ms Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 1 Unknown, 0 Unchecked, 2405.56ms Time] [2021-11-13 17:46:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-13 17:46:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 165. [2021-11-13 17:46:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5121951219512195) internal successors, (248), 164 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 248 transitions. [2021-11-13 17:46:33,562 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 248 transitions. Word has length 77 [2021-11-13 17:46:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:33,563 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 248 transitions. [2021-11-13 17:46:33,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 248 transitions. [2021-11-13 17:46:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 17:46:33,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:33,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:33,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:46:33,566 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:33,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1840502030, now seen corresponding path program 1 times [2021-11-13 17:46:33,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:33,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102428691] [2021-11-13 17:46:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:33,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:33,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:33,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102428691] [2021-11-13 17:46:33,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102428691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:33,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:33,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:33,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591371962] [2021-11-13 17:46:33,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:33,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:33,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:33,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:33,677 INFO L87 Difference]: Start difference. First operand 165 states and 248 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:35,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:36,102 INFO L93 Difference]: Finished difference Result 330 states and 499 transitions. [2021-11-13 17:46:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:36,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-13 17:46:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:36,105 INFO L225 Difference]: With dead ends: 330 [2021-11-13 17:46:36,105 INFO L226 Difference]: Without dead ends: 186 [2021-11-13 17:46:36,106 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:36,107 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 45 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2318.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.13ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2399.74ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:36,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 463 Invalid, 173 Unknown, 0 Unchecked, 3.13ms Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2399.74ms Time] [2021-11-13 17:46:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-13 17:46:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 165. [2021-11-13 17:46:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5060975609756098) internal successors, (247), 164 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 247 transitions. [2021-11-13 17:46:36,117 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 247 transitions. Word has length 78 [2021-11-13 17:46:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:36,117 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 247 transitions. [2021-11-13 17:46:36,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 247 transitions. [2021-11-13 17:46:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 17:46:36,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:36,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:36,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:46:36,120 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1002491258, now seen corresponding path program 1 times [2021-11-13 17:46:36,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:36,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101674282] [2021-11-13 17:46:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:36,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:36,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:36,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101674282] [2021-11-13 17:46:36,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101674282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:36,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:36,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:36,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093604923] [2021-11-13 17:46:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:36,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:36,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:36,205 INFO L87 Difference]: Start difference. First operand 165 states and 247 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:38,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:38,606 INFO L93 Difference]: Finished difference Result 330 states and 497 transitions. [2021-11-13 17:46:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-13 17:46:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:38,609 INFO L225 Difference]: With dead ends: 330 [2021-11-13 17:46:38,609 INFO L226 Difference]: Without dead ends: 186 [2021-11-13 17:46:38,610 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:38,611 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 43 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2296.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2374.02ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:38,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 463 Invalid, 173 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2374.02ms Time] [2021-11-13 17:46:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-13 17:46:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 165. [2021-11-13 17:46:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5) internal successors, (246), 164 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 246 transitions. [2021-11-13 17:46:38,619 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 246 transitions. Word has length 78 [2021-11-13 17:46:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:38,620 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 246 transitions. [2021-11-13 17:46:38,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 246 transitions. [2021-11-13 17:46:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 17:46:38,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:38,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:38,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:46:38,622 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:38,623 INFO L85 PathProgramCache]: Analyzing trace with hash 452039581, now seen corresponding path program 1 times [2021-11-13 17:46:38,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:38,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634625249] [2021-11-13 17:46:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:38,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:38,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:38,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634625249] [2021-11-13 17:46:38,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634625249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:38,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:38,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:38,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629474633] [2021-11-13 17:46:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:38,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:38,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:38,700 INFO L87 Difference]: Start difference. First operand 165 states and 246 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:40,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:41,129 INFO L93 Difference]: Finished difference Result 329 states and 494 transitions. [2021-11-13 17:46:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-13 17:46:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:41,132 INFO L225 Difference]: With dead ends: 329 [2021-11-13 17:46:41,132 INFO L226 Difference]: Without dead ends: 185 [2021-11-13 17:46:41,133 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:41,134 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 36 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2312.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.74ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2401.97ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:41,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 465 Invalid, 171 Unknown, 0 Unchecked, 2.74ms Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2401.97ms Time] [2021-11-13 17:46:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-13 17:46:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2021-11-13 17:46:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4939024390243902) internal successors, (245), 164 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 245 transitions. [2021-11-13 17:46:41,144 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 245 transitions. Word has length 78 [2021-11-13 17:46:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:41,144 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 245 transitions. [2021-11-13 17:46:41,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 245 transitions. [2021-11-13 17:46:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 17:46:41,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:41,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:41,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:46:41,147 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -497308579, now seen corresponding path program 1 times [2021-11-13 17:46:41,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:41,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190778942] [2021-11-13 17:46:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:41,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:41,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:41,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190778942] [2021-11-13 17:46:41,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190778942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:41,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:41,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:41,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043222360] [2021-11-13 17:46:41,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:41,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:41,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:41,246 INFO L87 Difference]: Start difference. First operand 165 states and 245 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:43,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:43,634 INFO L93 Difference]: Finished difference Result 327 states and 490 transitions. [2021-11-13 17:46:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-13 17:46:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:43,637 INFO L225 Difference]: With dead ends: 327 [2021-11-13 17:46:43,637 INFO L226 Difference]: Without dead ends: 183 [2021-11-13 17:46:43,638 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:43,639 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 36 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2283.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2362.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:43,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2362.21ms Time] [2021-11-13 17:46:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-13 17:46:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 165. [2021-11-13 17:46:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4878048780487805) internal successors, (244), 164 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 244 transitions. [2021-11-13 17:46:43,648 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 244 transitions. Word has length 78 [2021-11-13 17:46:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:43,648 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 244 transitions. [2021-11-13 17:46:43,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 244 transitions. [2021-11-13 17:46:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-13 17:46:43,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:43,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:43,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:46:43,651 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1911641090, now seen corresponding path program 1 times [2021-11-13 17:46:43,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:43,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795145012] [2021-11-13 17:46:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:43,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:43,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:43,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795145012] [2021-11-13 17:46:43,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795145012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:43,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:43,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:43,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208929818] [2021-11-13 17:46:43,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:43,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:43,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:43,730 INFO L87 Difference]: Start difference. First operand 165 states and 244 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:45,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:46,084 INFO L93 Difference]: Finished difference Result 327 states and 488 transitions. [2021-11-13 17:46:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:46,084 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-13 17:46:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:46,086 INFO L225 Difference]: With dead ends: 327 [2021-11-13 17:46:46,087 INFO L226 Difference]: Without dead ends: 183 [2021-11-13 17:46:46,087 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:46,088 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 39 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2265.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2332.78ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:46,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2332.78ms Time] [2021-11-13 17:46:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-13 17:46:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 165. [2021-11-13 17:46:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 243 transitions. [2021-11-13 17:46:46,099 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 243 transitions. Word has length 79 [2021-11-13 17:46:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:46,100 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 243 transitions. [2021-11-13 17:46:46,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 243 transitions. [2021-11-13 17:46:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 17:46:46,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:46,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:46,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 17:46:46,102 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2016633867, now seen corresponding path program 1 times [2021-11-13 17:46:46,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:46,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229163420] [2021-11-13 17:46:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:46,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:46,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:46,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229163420] [2021-11-13 17:46:46,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229163420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:46,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:46,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:46,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225799380] [2021-11-13 17:46:46,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:46,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:46,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:46,204 INFO L87 Difference]: Start difference. First operand 165 states and 243 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:48,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:48,569 INFO L93 Difference]: Finished difference Result 327 states and 486 transitions. [2021-11-13 17:46:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:48,570 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-13 17:46:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:48,572 INFO L225 Difference]: With dead ends: 327 [2021-11-13 17:46:48,572 INFO L226 Difference]: Without dead ends: 183 [2021-11-13 17:46:48,573 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:48,574 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 37 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2247.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2316.88ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:48,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2316.88ms Time] [2021-11-13 17:46:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-13 17:46:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 165. [2021-11-13 17:46:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.475609756097561) internal successors, (242), 164 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 242 transitions. [2021-11-13 17:46:48,582 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 242 transitions. Word has length 80 [2021-11-13 17:46:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:48,583 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 242 transitions. [2021-11-13 17:46:48,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 242 transitions. [2021-11-13 17:46:48,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 17:46:48,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:48,585 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:48,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 17:46:48,586 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash 937645863, now seen corresponding path program 1 times [2021-11-13 17:46:48,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:48,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344339944] [2021-11-13 17:46:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:48,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:48,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:48,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344339944] [2021-11-13 17:46:48,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344339944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:48,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:48,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:48,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679852550] [2021-11-13 17:46:48,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:48,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:48,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:48,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:48,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:48,672 INFO L87 Difference]: Start difference. First operand 165 states and 242 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:50,684 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:50,951 INFO L93 Difference]: Finished difference Result 317 states and 471 transitions. [2021-11-13 17:46:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-13 17:46:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:50,954 INFO L225 Difference]: With dead ends: 317 [2021-11-13 17:46:50,954 INFO L226 Difference]: Without dead ends: 173 [2021-11-13 17:46:50,955 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:46:50,955 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 28 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2200.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2262.50ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:50,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 483 Invalid, 148 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2262.50ms Time] [2021-11-13 17:46:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-13 17:46:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2021-11-13 17:46:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4695121951219512) internal successors, (241), 164 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2021-11-13 17:46:50,964 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 81 [2021-11-13 17:46:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:50,965 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2021-11-13 17:46:50,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2021-11-13 17:46:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 17:46:50,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:50,967 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:50,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 17:46:50,968 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash -617936825, now seen corresponding path program 1 times [2021-11-13 17:46:50,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:50,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371199357] [2021-11-13 17:46:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:50,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:46:51,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:51,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371199357] [2021-11-13 17:46:51,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371199357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:51,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:51,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:51,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756362116] [2021-11-13 17:46:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:51,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:51,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:51,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:51,072 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:53,086 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:53,658 INFO L93 Difference]: Finished difference Result 405 states and 606 transitions. [2021-11-13 17:46:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-13 17:46:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:53,662 INFO L225 Difference]: With dead ends: 405 [2021-11-13 17:46:53,662 INFO L226 Difference]: Without dead ends: 261 [2021-11-13 17:46:53,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:53,664 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 78 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2452.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2554.54ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:53,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 423 Invalid, 277 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [14 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2554.54ms Time] [2021-11-13 17:46:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-13 17:46:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 208. [2021-11-13 17:46:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.541062801932367) internal successors, (319), 207 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 319 transitions. [2021-11-13 17:46:53,675 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 319 transitions. Word has length 86 [2021-11-13 17:46:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:53,676 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 319 transitions. [2021-11-13 17:46:53,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 319 transitions. [2021-11-13 17:46:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 17:46:53,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:53,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:53,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 17:46:53,679 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:53,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1515330103, now seen corresponding path program 1 times [2021-11-13 17:46:53,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:53,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157687842] [2021-11-13 17:46:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:53,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:46:53,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:53,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157687842] [2021-11-13 17:46:53,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157687842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:53,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:53,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:53,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264367440] [2021-11-13 17:46:53,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:53,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:53,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:53,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:53,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:53,780 INFO L87 Difference]: Start difference. First operand 208 states and 319 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:55,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:56,228 INFO L93 Difference]: Finished difference Result 445 states and 690 transitions. [2021-11-13 17:46:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-13 17:46:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:56,231 INFO L225 Difference]: With dead ends: 445 [2021-11-13 17:46:56,231 INFO L226 Difference]: Without dead ends: 258 [2021-11-13 17:46:56,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:56,233 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 42 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2309.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2417.44ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:56,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 573 Invalid, 195 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2417.44ms Time] [2021-11-13 17:46:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-13 17:46:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 232. [2021-11-13 17:46:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.5627705627705628) internal successors, (361), 231 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 361 transitions. [2021-11-13 17:46:56,244 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 361 transitions. Word has length 86 [2021-11-13 17:46:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:56,245 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 361 transitions. [2021-11-13 17:46:56,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 361 transitions. [2021-11-13 17:46:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 17:46:56,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:56,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:56,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 17:46:56,248 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 682769125, now seen corresponding path program 1 times [2021-11-13 17:46:56,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:56,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076002301] [2021-11-13 17:46:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:56,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:46:56,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:56,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076002301] [2021-11-13 17:46:56,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076002301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:56,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:56,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:56,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813485633] [2021-11-13 17:46:56,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:56,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:56,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:56,344 INFO L87 Difference]: Start difference. First operand 232 states and 361 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:58,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:46:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:58,819 INFO L93 Difference]: Finished difference Result 496 states and 767 transitions. [2021-11-13 17:46:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-13 17:46:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:58,822 INFO L225 Difference]: With dead ends: 496 [2021-11-13 17:46:58,822 INFO L226 Difference]: Without dead ends: 285 [2021-11-13 17:46:58,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:58,824 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 102 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2361.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2451.77ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:58,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 427 Invalid, 277 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [14 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2451.77ms Time] [2021-11-13 17:46:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-13 17:46:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 232. [2021-11-13 17:46:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.5584415584415585) internal successors, (360), 231 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 360 transitions. [2021-11-13 17:46:58,835 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 360 transitions. Word has length 99 [2021-11-13 17:46:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:58,836 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 360 transitions. [2021-11-13 17:46:58,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:46:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 360 transitions. [2021-11-13 17:46:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 17:46:58,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:58,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:58,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 17:46:58,838 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:46:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 723443875, now seen corresponding path program 1 times [2021-11-13 17:46:58,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:58,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550433927] [2021-11-13 17:46:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:58,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:46:58,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:58,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550433927] [2021-11-13 17:46:58,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550433927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:58,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:58,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:58,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703274390] [2021-11-13 17:46:58,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:58,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:58,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:58,928 INFO L87 Difference]: Start difference. First operand 232 states and 360 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:00,940 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:01,334 INFO L93 Difference]: Finished difference Result 469 states and 729 transitions. [2021-11-13 17:47:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-13 17:47:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:01,337 INFO L225 Difference]: With dead ends: 469 [2021-11-13 17:47:01,338 INFO L226 Difference]: Without dead ends: 258 [2021-11-13 17:47:01,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:01,339 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 49 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2307.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2384.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:01,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 573 Invalid, 193 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2384.63ms Time] [2021-11-13 17:47:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-13 17:47:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 232. [2021-11-13 17:47:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.5541125541125542) internal successors, (359), 231 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 359 transitions. [2021-11-13 17:47:01,350 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 359 transitions. Word has length 99 [2021-11-13 17:47:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:01,351 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 359 transitions. [2021-11-13 17:47:01,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 359 transitions. [2021-11-13 17:47:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 17:47:01,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:01,353 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:01,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 17:47:01,354 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash -716503002, now seen corresponding path program 1 times [2021-11-13 17:47:01,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:01,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975427768] [2021-11-13 17:47:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:01,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:01,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:01,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975427768] [2021-11-13 17:47:01,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975427768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:01,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:01,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:01,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832247300] [2021-11-13 17:47:01,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:01,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:01,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:01,461 INFO L87 Difference]: Start difference. First operand 232 states and 359 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:03,474 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:03,931 INFO L93 Difference]: Finished difference Result 495 states and 762 transitions. [2021-11-13 17:47:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-13 17:47:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:03,935 INFO L225 Difference]: With dead ends: 495 [2021-11-13 17:47:03,935 INFO L226 Difference]: Without dead ends: 284 [2021-11-13 17:47:03,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:03,951 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 106 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2354.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2446.94ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:03,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 425 Invalid, 273 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [13 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2446.94ms Time] [2021-11-13 17:47:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-13 17:47:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 232. [2021-11-13 17:47:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.5497835497835497) internal successors, (358), 231 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 358 transitions. [2021-11-13 17:47:03,964 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 358 transitions. Word has length 100 [2021-11-13 17:47:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:03,964 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 358 transitions. [2021-11-13 17:47:03,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 358 transitions. [2021-11-13 17:47:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 17:47:03,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:03,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:03,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-13 17:47:03,967 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 121507770, now seen corresponding path program 1 times [2021-11-13 17:47:03,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:03,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068867391] [2021-11-13 17:47:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:03,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 17:47:04,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:04,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068867391] [2021-11-13 17:47:04,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068867391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:04,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:04,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:47:04,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543872556] [2021-11-13 17:47:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:04,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:47:04,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:47:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:04,098 INFO L87 Difference]: Start difference. First operand 232 states and 358 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:06,112 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:08,137 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:08,614 INFO L93 Difference]: Finished difference Result 464 states and 721 transitions. [2021-11-13 17:47:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:47:08,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-13 17:47:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:08,617 INFO L225 Difference]: With dead ends: 464 [2021-11-13 17:47:08,617 INFO L226 Difference]: Without dead ends: 253 [2021-11-13 17:47:08,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:47:08,619 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 142 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4358.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4484.50ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:08,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 324 Invalid, 354 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [42 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4484.50ms Time] [2021-11-13 17:47:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-13 17:47:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2021-11-13 17:47:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5298804780876494) internal successors, (384), 251 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 384 transitions. [2021-11-13 17:47:08,632 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 384 transitions. Word has length 100 [2021-11-13 17:47:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:08,633 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 384 transitions. [2021-11-13 17:47:08,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 384 transitions. [2021-11-13 17:47:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 17:47:08,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:08,635 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:08,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-13 17:47:08,636 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1576038609, now seen corresponding path program 1 times [2021-11-13 17:47:08,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:08,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055211932] [2021-11-13 17:47:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:08,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:08,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:08,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055211932] [2021-11-13 17:47:08,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055211932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:08,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:08,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:08,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919893112] [2021-11-13 17:47:08,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:08,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:08,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:08,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:08,725 INFO L87 Difference]: Start difference. First operand 252 states and 384 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:10,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:11,213 INFO L93 Difference]: Finished difference Result 534 states and 810 transitions. [2021-11-13 17:47:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:11,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-13 17:47:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:11,215 INFO L225 Difference]: With dead ends: 534 [2021-11-13 17:47:11,216 INFO L226 Difference]: Without dead ends: 303 [2021-11-13 17:47:11,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:11,217 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 98 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2372.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2462.47ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:11,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 429 Invalid, 269 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [13 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2462.47ms Time] [2021-11-13 17:47:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-13 17:47:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 252. [2021-11-13 17:47:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5258964143426295) internal successors, (383), 251 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 383 transitions. [2021-11-13 17:47:11,231 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 383 transitions. Word has length 100 [2021-11-13 17:47:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:11,231 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 383 transitions. [2021-11-13 17:47:11,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 383 transitions. [2021-11-13 17:47:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 17:47:11,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:11,233 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:11,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 17:47:11,234 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash 626690449, now seen corresponding path program 1 times [2021-11-13 17:47:11,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:11,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143149079] [2021-11-13 17:47:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:11,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:11,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:11,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143149079] [2021-11-13 17:47:11,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143149079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:11,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:11,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:11,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867806724] [2021-11-13 17:47:11,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:11,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:11,326 INFO L87 Difference]: Start difference. First operand 252 states and 383 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:13,339 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:13,753 INFO L93 Difference]: Finished difference Result 532 states and 806 transitions. [2021-11-13 17:47:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-13 17:47:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:13,756 INFO L225 Difference]: With dead ends: 532 [2021-11-13 17:47:13,756 INFO L226 Difference]: Without dead ends: 301 [2021-11-13 17:47:13,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:13,758 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 98 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2317.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2400.14ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:13,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 433 Invalid, 264 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [12 Valid, 251 Invalid, 1 Unknown, 0 Unchecked, 2400.14ms Time] [2021-11-13 17:47:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-13 17:47:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2021-11-13 17:47:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5219123505976095) internal successors, (382), 251 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 382 transitions. [2021-11-13 17:47:13,771 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 382 transitions. Word has length 100 [2021-11-13 17:47:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:13,772 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 382 transitions. [2021-11-13 17:47:13,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 382 transitions. [2021-11-13 17:47:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 17:47:13,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:13,774 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:13,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 17:47:13,775 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1458011437, now seen corresponding path program 1 times [2021-11-13 17:47:13,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:13,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365663902] [2021-11-13 17:47:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:13,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:13,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:13,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365663902] [2021-11-13 17:47:13,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365663902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:13,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:13,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:13,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469790042] [2021-11-13 17:47:13,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:13,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:13,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:13,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:13,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:13,863 INFO L87 Difference]: Start difference. First operand 252 states and 382 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:15,876 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:16,223 INFO L93 Difference]: Finished difference Result 507 states and 770 transitions. [2021-11-13 17:47:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-13 17:47:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:16,226 INFO L225 Difference]: With dead ends: 507 [2021-11-13 17:47:16,226 INFO L226 Difference]: Without dead ends: 276 [2021-11-13 17:47:16,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:16,228 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 45 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2261.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2338.50ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:16,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 563 Invalid, 183 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2338.50ms Time] [2021-11-13 17:47:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-13 17:47:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 252. [2021-11-13 17:47:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5179282868525896) internal successors, (381), 251 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 381 transitions. [2021-11-13 17:47:16,241 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 381 transitions. Word has length 100 [2021-11-13 17:47:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:16,241 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 381 transitions. [2021-11-13 17:47:16,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 381 transitions. [2021-11-13 17:47:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 17:47:16,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:16,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:16,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-13 17:47:16,244 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1887607699, now seen corresponding path program 1 times [2021-11-13 17:47:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:16,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66282827] [2021-11-13 17:47:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:16,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:16,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:16,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66282827] [2021-11-13 17:47:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66282827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:16,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:16,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:16,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570431936] [2021-11-13 17:47:16,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:16,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:16,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:16,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:16,335 INFO L87 Difference]: Start difference. First operand 252 states and 381 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:18,349 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:18,719 INFO L93 Difference]: Finished difference Result 505 states and 766 transitions. [2021-11-13 17:47:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:18,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-13 17:47:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:18,722 INFO L225 Difference]: With dead ends: 505 [2021-11-13 17:47:18,723 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 17:47:18,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:18,724 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 45 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2283.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2358.41ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:18,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 567 Invalid, 178 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2358.41ms Time] [2021-11-13 17:47:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 17:47:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 252. [2021-11-13 17:47:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5139442231075697) internal successors, (380), 251 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 380 transitions. [2021-11-13 17:47:18,737 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 380 transitions. Word has length 100 [2021-11-13 17:47:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:18,738 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 380 transitions. [2021-11-13 17:47:18,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 380 transitions. [2021-11-13 17:47:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 17:47:18,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:18,740 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:18,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-13 17:47:18,741 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:18,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1026799039, now seen corresponding path program 1 times [2021-11-13 17:47:18,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:18,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196032410] [2021-11-13 17:47:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:18,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:18,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:18,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196032410] [2021-11-13 17:47:18,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196032410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:18,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:18,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:18,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110145583] [2021-11-13 17:47:18,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:18,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:18,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:18,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:18,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:18,832 INFO L87 Difference]: Start difference. First operand 252 states and 380 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:20,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:21,394 INFO L93 Difference]: Finished difference Result 532 states and 800 transitions. [2021-11-13 17:47:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-13 17:47:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:21,398 INFO L225 Difference]: With dead ends: 532 [2021-11-13 17:47:21,398 INFO L226 Difference]: Without dead ends: 301 [2021-11-13 17:47:21,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:21,400 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 102 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2419.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2523.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:21,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 457 Invalid, 265 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [12 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2523.26ms Time] [2021-11-13 17:47:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-13 17:47:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2021-11-13 17:47:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5099601593625498) internal successors, (379), 251 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 379 transitions. [2021-11-13 17:47:21,412 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 379 transitions. Word has length 101 [2021-11-13 17:47:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:21,413 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 379 transitions. [2021-11-13 17:47:21,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 379 transitions. [2021-11-13 17:47:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 17:47:21,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:21,415 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:21,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-13 17:47:21,416 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:21,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash -593069953, now seen corresponding path program 1 times [2021-11-13 17:47:21,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:21,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235969044] [2021-11-13 17:47:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:21,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:21,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:21,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235969044] [2021-11-13 17:47:21,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235969044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:21,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:21,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:21,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050284552] [2021-11-13 17:47:21,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:21,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:21,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:21,532 INFO L87 Difference]: Start difference. First operand 252 states and 379 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:23,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:23,907 INFO L93 Difference]: Finished difference Result 505 states and 762 transitions. [2021-11-13 17:47:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-13 17:47:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:23,909 INFO L225 Difference]: With dead ends: 505 [2021-11-13 17:47:23,910 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 17:47:23,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:23,911 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 49 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2276.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2351.85ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:23,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 565 Invalid, 178 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2351.85ms Time] [2021-11-13 17:47:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 17:47:23,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 252. [2021-11-13 17:47:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5059760956175299) internal successors, (378), 251 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 378 transitions. [2021-11-13 17:47:23,925 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 378 transitions. Word has length 101 [2021-11-13 17:47:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:23,925 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 378 transitions. [2021-11-13 17:47:23,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 378 transitions. [2021-11-13 17:47:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 17:47:23,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:23,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:23,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 17:47:23,928 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash 759033645, now seen corresponding path program 1 times [2021-11-13 17:47:23,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:23,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290187363] [2021-11-13 17:47:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:23,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:24,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:24,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290187363] [2021-11-13 17:47:24,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290187363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:24,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:24,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:24,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743793637] [2021-11-13 17:47:24,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:24,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:24,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:24,019 INFO L87 Difference]: Start difference. First operand 252 states and 378 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:26,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:26,500 INFO L93 Difference]: Finished difference Result 532 states and 796 transitions. [2021-11-13 17:47:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-13 17:47:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:26,502 INFO L225 Difference]: With dead ends: 532 [2021-11-13 17:47:26,502 INFO L226 Difference]: Without dead ends: 301 [2021-11-13 17:47:26,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:26,503 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 100 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2357.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2453.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:26,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 457 Invalid, 265 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [12 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2453.38ms Time] [2021-11-13 17:47:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-13 17:47:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2021-11-13 17:47:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.50199203187251) internal successors, (377), 251 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 377 transitions. [2021-11-13 17:47:26,516 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 377 transitions. Word has length 102 [2021-11-13 17:47:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:26,517 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 377 transitions. [2021-11-13 17:47:26,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 377 transitions. [2021-11-13 17:47:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 17:47:26,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:26,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:26,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-13 17:47:26,519 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:26,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1319733423, now seen corresponding path program 1 times [2021-11-13 17:47:26,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:26,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73607481] [2021-11-13 17:47:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:26,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:26,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:26,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73607481] [2021-11-13 17:47:26,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73607481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:26,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:26,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:26,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459277604] [2021-11-13 17:47:26,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:26,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:26,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:26,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:26,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:26,611 INFO L87 Difference]: Start difference. First operand 252 states and 377 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:28,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:29,044 INFO L93 Difference]: Finished difference Result 505 states and 758 transitions. [2021-11-13 17:47:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:29,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-13 17:47:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:29,048 INFO L225 Difference]: With dead ends: 505 [2021-11-13 17:47:29,048 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 17:47:29,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:29,049 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 47 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2310.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2393.02ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:29,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 563 Invalid, 178 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2393.02ms Time] [2021-11-13 17:47:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 17:47:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 252. [2021-11-13 17:47:29,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.49800796812749) internal successors, (376), 251 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 376 transitions. [2021-11-13 17:47:29,066 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 376 transitions. Word has length 102 [2021-11-13 17:47:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:29,066 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 376 transitions. [2021-11-13 17:47:29,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 376 transitions. [2021-11-13 17:47:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 17:47:29,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:29,068 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:29,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-13 17:47:29,069 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:29,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:29,070 INFO L85 PathProgramCache]: Analyzing trace with hash -917428644, now seen corresponding path program 1 times [2021-11-13 17:47:29,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:29,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241853185] [2021-11-13 17:47:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:29,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:29,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:29,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241853185] [2021-11-13 17:47:29,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241853185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:29,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:29,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:29,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628082709] [2021-11-13 17:47:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:29,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:29,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:29,163 INFO L87 Difference]: Start difference. First operand 252 states and 376 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:31,172 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:31,644 INFO L93 Difference]: Finished difference Result 532 states and 792 transitions. [2021-11-13 17:47:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-13 17:47:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:31,646 INFO L225 Difference]: With dead ends: 532 [2021-11-13 17:47:31,647 INFO L226 Difference]: Without dead ends: 301 [2021-11-13 17:47:31,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:31,648 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 98 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2337.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2438.69ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:31,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 457 Invalid, 265 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [12 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2438.69ms Time] [2021-11-13 17:47:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-13 17:47:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 252. [2021-11-13 17:47:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4940239043824701) internal successors, (375), 251 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 375 transitions. [2021-11-13 17:47:31,661 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 375 transitions. Word has length 103 [2021-11-13 17:47:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:31,661 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 375 transitions. [2021-11-13 17:47:31,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 375 transitions. [2021-11-13 17:47:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 17:47:31,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:31,664 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:31,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-13 17:47:31,664 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:31,665 INFO L85 PathProgramCache]: Analyzing trace with hash -715604710, now seen corresponding path program 1 times [2021-11-13 17:47:31,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:31,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46015987] [2021-11-13 17:47:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:31,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:31,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:31,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46015987] [2021-11-13 17:47:31,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46015987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:31,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:31,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:31,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69321239] [2021-11-13 17:47:31,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:31,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:31,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:31,759 INFO L87 Difference]: Start difference. First operand 252 states and 375 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:33,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:34,170 INFO L93 Difference]: Finished difference Result 505 states and 754 transitions. [2021-11-13 17:47:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-13 17:47:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:34,172 INFO L225 Difference]: With dead ends: 505 [2021-11-13 17:47:34,172 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 17:47:34,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:34,174 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 45 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2303.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2380.97ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:34,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 561 Invalid, 178 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2380.97ms Time] [2021-11-13 17:47:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 17:47:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 252. [2021-11-13 17:47:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4900398406374502) internal successors, (374), 251 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 374 transitions. [2021-11-13 17:47:34,187 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 374 transitions. Word has length 103 [2021-11-13 17:47:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:34,187 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 374 transitions. [2021-11-13 17:47:34,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 374 transitions. [2021-11-13 17:47:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 17:47:34,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:34,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:34,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-13 17:47:34,190 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1744114600, now seen corresponding path program 1 times [2021-11-13 17:47:34,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:34,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030938385] [2021-11-13 17:47:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:34,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:34,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:34,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030938385] [2021-11-13 17:47:34,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030938385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:34,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:34,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:34,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772941791] [2021-11-13 17:47:34,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:34,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:34,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:34,303 INFO L87 Difference]: Start difference. First operand 252 states and 374 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:36,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:36,782 INFO L93 Difference]: Finished difference Result 522 states and 776 transitions. [2021-11-13 17:47:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:36,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-13 17:47:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:36,784 INFO L225 Difference]: With dead ends: 522 [2021-11-13 17:47:36,784 INFO L226 Difference]: Without dead ends: 291 [2021-11-13 17:47:36,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:36,785 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 89 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2362.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2450.80ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:36,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 445 Invalid, 248 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 2450.80ms Time] [2021-11-13 17:47:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-13 17:47:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 252. [2021-11-13 17:47:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4860557768924303) internal successors, (373), 251 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 373 transitions. [2021-11-13 17:47:36,797 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 373 transitions. Word has length 104 [2021-11-13 17:47:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:36,797 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 373 transitions. [2021-11-13 17:47:36,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 373 transitions. [2021-11-13 17:47:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 17:47:36,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:36,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:36,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-13 17:47:36,800 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash -589278038, now seen corresponding path program 1 times [2021-11-13 17:47:36,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:36,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714115675] [2021-11-13 17:47:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:36,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:36,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:36,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714115675] [2021-11-13 17:47:36,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714115675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:36,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:36,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:36,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458396246] [2021-11-13 17:47:36,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:36,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:36,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:36,892 INFO L87 Difference]: Start difference. First operand 252 states and 373 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:38,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:39,295 INFO L93 Difference]: Finished difference Result 495 states and 738 transitions. [2021-11-13 17:47:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:39,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-13 17:47:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:39,298 INFO L225 Difference]: With dead ends: 495 [2021-11-13 17:47:39,299 INFO L226 Difference]: Without dead ends: 264 [2021-11-13 17:47:39,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:39,300 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 36 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2298.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2378.36ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:39,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 547 Invalid, 161 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2378.36ms Time] [2021-11-13 17:47:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-13 17:47:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 252. [2021-11-13 17:47:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4820717131474104) internal successors, (372), 251 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 372 transitions. [2021-11-13 17:47:39,313 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 372 transitions. Word has length 104 [2021-11-13 17:47:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:39,313 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 372 transitions. [2021-11-13 17:47:39,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 372 transitions. [2021-11-13 17:47:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 17:47:39,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:39,316 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:39,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-13 17:47:39,317 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1868826641, now seen corresponding path program 1 times [2021-11-13 17:47:39,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:39,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849297635] [2021-11-13 17:47:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:39,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:47:39,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:39,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849297635] [2021-11-13 17:47:39,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849297635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:39,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:39,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:39,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212586656] [2021-11-13 17:47:39,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:39,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:39,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:39,417 INFO L87 Difference]: Start difference. First operand 252 states and 372 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:41,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:41,877 INFO L93 Difference]: Finished difference Result 522 states and 772 transitions. [2021-11-13 17:47:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-13 17:47:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:41,880 INFO L225 Difference]: With dead ends: 522 [2021-11-13 17:47:41,881 INFO L226 Difference]: Without dead ends: 291 [2021-11-13 17:47:41,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:41,882 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 79 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2319.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2406.59ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:41,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 457 Invalid, 248 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 2406.59ms Time] [2021-11-13 17:47:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-13 17:47:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 252. [2021-11-13 17:47:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.4780876494023905) internal successors, (371), 251 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 371 transitions. [2021-11-13 17:47:41,894 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 371 transitions. Word has length 108 [2021-11-13 17:47:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:41,895 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 371 transitions. [2021-11-13 17:47:41,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 371 transitions. [2021-11-13 17:47:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 17:47:41,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:41,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:41,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-13 17:47:41,896 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash 739960817, now seen corresponding path program 1 times [2021-11-13 17:47:41,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:41,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126443561] [2021-11-13 17:47:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:41,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 17:47:41,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:41,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126443561] [2021-11-13 17:47:41,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126443561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:41,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:41,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:47:41,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688670920] [2021-11-13 17:47:41,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:41,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:41,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:41,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:41,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:47:41,983 INFO L87 Difference]: Start difference. First operand 252 states and 371 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:42,024 INFO L93 Difference]: Finished difference Result 710 states and 1060 transitions. [2021-11-13 17:47:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-13 17:47:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:42,029 INFO L225 Difference]: With dead ends: 710 [2021-11-13 17:47:42,029 INFO L226 Difference]: Without dead ends: 479 [2021-11-13 17:47:42,030 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:42,031 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 131 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.85ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:42,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 420 Invalid, 19 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 23.85ms Time] [2021-11-13 17:47:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-13 17:47:42,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2021-11-13 17:47:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.4832635983263598) internal successors, (709), 478 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 709 transitions. [2021-11-13 17:47:42,053 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 709 transitions. Word has length 108 [2021-11-13 17:47:42,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:42,053 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 709 transitions. [2021-11-13 17:47:42,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 709 transitions. [2021-11-13 17:47:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 17:47:42,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:42,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:42,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-13 17:47:42,057 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash -945850584, now seen corresponding path program 1 times [2021-11-13 17:47:42,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:42,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106391428] [2021-11-13 17:47:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:42,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 17:47:42,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:42,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106391428] [2021-11-13 17:47:42,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106391428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:42,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:42,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:47:42,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179715606] [2021-11-13 17:47:42,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:42,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:42,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:47:42,124 INFO L87 Difference]: Start difference. First operand 479 states and 709 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:42,158 INFO L93 Difference]: Finished difference Result 964 states and 1430 transitions. [2021-11-13 17:47:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-13 17:47:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:42,163 INFO L225 Difference]: With dead ends: 964 [2021-11-13 17:47:42,163 INFO L226 Difference]: Without dead ends: 506 [2021-11-13 17:47:42,164 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:42,165 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.22ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:42,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 400 Invalid, 13 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 17.22ms Time] [2021-11-13 17:47:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-13 17:47:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-11-13 17:47:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.4732673267326732) internal successors, (744), 505 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 744 transitions. [2021-11-13 17:47:42,189 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 744 transitions. Word has length 109 [2021-11-13 17:47:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:42,189 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 744 transitions. [2021-11-13 17:47:42,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 744 transitions. [2021-11-13 17:47:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 17:47:42,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:42,192 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:42,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-13 17:47:42,193 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1940544282, now seen corresponding path program 1 times [2021-11-13 17:47:42,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:42,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558152232] [2021-11-13 17:47:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:42,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-13 17:47:42,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:42,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558152232] [2021-11-13 17:47:42,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558152232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:42,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:42,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:47:42,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846918324] [2021-11-13 17:47:42,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:42,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:42,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:42,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:42,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:47:42,255 INFO L87 Difference]: Start difference. First operand 506 states and 744 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:42,284 INFO L93 Difference]: Finished difference Result 993 states and 1466 transitions. [2021-11-13 17:47:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-13 17:47:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:42,289 INFO L225 Difference]: With dead ends: 993 [2021-11-13 17:47:42,289 INFO L226 Difference]: Without dead ends: 508 [2021-11-13 17:47:42,290 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:42,291 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.85ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:42,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 379 Invalid, 11 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 11.85ms Time] [2021-11-13 17:47:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-13 17:47:42,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2021-11-13 17:47:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.4714003944773175) internal successors, (746), 507 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 746 transitions. [2021-11-13 17:47:42,331 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 746 transitions. Word has length 109 [2021-11-13 17:47:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:42,332 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 746 transitions. [2021-11-13 17:47:42,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,333 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 746 transitions. [2021-11-13 17:47:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 17:47:42,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:42,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:42,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-13 17:47:42,336 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:42,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1960687741, now seen corresponding path program 1 times [2021-11-13 17:47:42,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:42,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641668163] [2021-11-13 17:47:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:42,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 17:47:42,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:42,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641668163] [2021-11-13 17:47:42,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641668163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:42,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:42,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:47:42,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203334872] [2021-11-13 17:47:42,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:42,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:42,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:47:42,464 INFO L87 Difference]: Start difference. First operand 508 states and 746 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:42,512 INFO L93 Difference]: Finished difference Result 739 states and 1092 transitions. [2021-11-13 17:47:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-13 17:47:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:42,519 INFO L225 Difference]: With dead ends: 739 [2021-11-13 17:47:42,519 INFO L226 Difference]: Without dead ends: 737 [2021-11-13 17:47:42,520 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:42,524 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 148 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.58ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:42,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 371 Invalid, 21 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 24.58ms Time] [2021-11-13 17:47:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-13 17:47:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 737. [2021-11-13 17:47:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 1.4809782608695652) internal successors, (1090), 736 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1090 transitions. [2021-11-13 17:47:42,558 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1090 transitions. Word has length 127 [2021-11-13 17:47:42,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:42,558 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1090 transitions. [2021-11-13 17:47:42,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1090 transitions. [2021-11-13 17:47:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-13 17:47:42,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:42,562 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:42,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-13 17:47:42,564 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -973790466, now seen corresponding path program 1 times [2021-11-13 17:47:42,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:42,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961824808] [2021-11-13 17:47:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:42,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 17:47:42,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:42,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961824808] [2021-11-13 17:47:42,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961824808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:42,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:42,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:42,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586898474] [2021-11-13 17:47:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:42,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:42,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:42,693 INFO L87 Difference]: Start difference. First operand 737 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:44,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:45,270 INFO L93 Difference]: Finished difference Result 1654 states and 2463 transitions. [2021-11-13 17:47:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-11-13 17:47:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:45,278 INFO L225 Difference]: With dead ends: 1654 [2021-11-13 17:47:45,278 INFO L226 Difference]: Without dead ends: 940 [2021-11-13 17:47:45,280 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:45,281 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 105 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2411.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2526.48ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:45,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 640 Invalid, 294 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [10 Valid, 283 Invalid, 1 Unknown, 0 Unchecked, 2526.48ms Time] [2021-11-13 17:47:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-11-13 17:47:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 781. [2021-11-13 17:47:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 1.4923076923076923) internal successors, (1164), 780 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1164 transitions. [2021-11-13 17:47:45,337 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1164 transitions. Word has length 172 [2021-11-13 17:47:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:45,338 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1164 transitions. [2021-11-13 17:47:45,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1164 transitions. [2021-11-13 17:47:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-13 17:47:45,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:45,342 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:45,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-13 17:47:45,342 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1350596086, now seen corresponding path program 1 times [2021-11-13 17:47:45,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:45,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58015301] [2021-11-13 17:47:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:45,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 17:47:45,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:45,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58015301] [2021-11-13 17:47:45,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58015301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:45,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:45,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:45,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111686552] [2021-11-13 17:47:45,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:45,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:45,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:45,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:45,462 INFO L87 Difference]: Start difference. First operand 781 states and 1164 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:47,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:48,070 INFO L93 Difference]: Finished difference Result 1686 states and 2516 transitions. [2021-11-13 17:47:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:48,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-13 17:47:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:48,078 INFO L225 Difference]: With dead ends: 1686 [2021-11-13 17:47:48,078 INFO L226 Difference]: Without dead ends: 928 [2021-11-13 17:47:48,080 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:48,081 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 97 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2435.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.45ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2554.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:48,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 630 Invalid, 286 Unknown, 0 Unchecked, 2.45ms Time], IncrementalHoareTripleChecker [10 Valid, 275 Invalid, 1 Unknown, 0 Unchecked, 2554.09ms Time] [2021-11-13 17:47:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-11-13 17:47:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 783. [2021-11-13 17:47:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.4910485933503836) internal successors, (1166), 782 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1166 transitions. [2021-11-13 17:47:48,119 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1166 transitions. Word has length 173 [2021-11-13 17:47:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:48,121 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1166 transitions. [2021-11-13 17:47:48,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1166 transitions. [2021-11-13 17:47:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 17:47:48,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:48,126 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:48,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-13 17:47:48,126 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2089989556, now seen corresponding path program 1 times [2021-11-13 17:47:48,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:48,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862482684] [2021-11-13 17:47:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:48,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:47:48,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:48,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862482684] [2021-11-13 17:47:48,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862482684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:48,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:48,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:48,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89512305] [2021-11-13 17:47:48,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:48,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:48,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:48,269 INFO L87 Difference]: Start difference. First operand 783 states and 1166 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:50,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:50,902 INFO L93 Difference]: Finished difference Result 1688 states and 2516 transitions. [2021-11-13 17:47:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:50,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-13 17:47:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:50,910 INFO L225 Difference]: With dead ends: 1688 [2021-11-13 17:47:50,910 INFO L226 Difference]: Without dead ends: 928 [2021-11-13 17:47:50,911 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:50,912 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 103 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2467.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.54ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2580.48ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:50,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 628 Invalid, 286 Unknown, 0 Unchecked, 2.54ms Time], IncrementalHoareTripleChecker [10 Valid, 275 Invalid, 1 Unknown, 0 Unchecked, 2580.48ms Time] [2021-11-13 17:47:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-11-13 17:47:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 783. [2021-11-13 17:47:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.4884910485933505) internal successors, (1164), 782 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1164 transitions. [2021-11-13 17:47:50,948 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1164 transitions. Word has length 185 [2021-11-13 17:47:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:50,949 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1164 transitions. [2021-11-13 17:47:50,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1164 transitions. [2021-11-13 17:47:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 17:47:50,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:50,956 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:50,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-13 17:47:50,957 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1255414068, now seen corresponding path program 1 times [2021-11-13 17:47:50,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:50,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298967621] [2021-11-13 17:47:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:50,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 17:47:51,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:51,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298967621] [2021-11-13 17:47:51,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298967621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:51,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:51,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:51,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640491232] [2021-11-13 17:47:51,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:51,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:51,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:51,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:51,064 INFO L87 Difference]: Start difference. First operand 783 states and 1164 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:53,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:53,582 INFO L93 Difference]: Finished difference Result 1843 states and 2757 transitions. [2021-11-13 17:47:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:53,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-13 17:47:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:53,591 INFO L225 Difference]: With dead ends: 1843 [2021-11-13 17:47:53,591 INFO L226 Difference]: Without dead ends: 1083 [2021-11-13 17:47:53,592 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:53,593 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 105 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2356.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2469.83ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:53,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 641 Invalid, 295 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [12 Valid, 282 Invalid, 1 Unknown, 0 Unchecked, 2469.83ms Time] [2021-11-13 17:47:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-13 17:47:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 849. [2021-11-13 17:47:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.5035377358490567) internal successors, (1275), 848 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1275 transitions. [2021-11-13 17:47:53,659 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1275 transitions. Word has length 186 [2021-11-13 17:47:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:53,659 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1275 transitions. [2021-11-13 17:47:53,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1275 transitions. [2021-11-13 17:47:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 17:47:53,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:53,664 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:53,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-13 17:47:53,664 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash -694470540, now seen corresponding path program 1 times [2021-11-13 17:47:53,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:53,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877358205] [2021-11-13 17:47:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:53,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:47:53,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:53,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877358205] [2021-11-13 17:47:53,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877358205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:53,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:53,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:53,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040919525] [2021-11-13 17:47:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:53,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:53,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:53,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:53,764 INFO L87 Difference]: Start difference. First operand 849 states and 1275 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:55,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:56,358 INFO L93 Difference]: Finished difference Result 1816 states and 2730 transitions. [2021-11-13 17:47:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-13 17:47:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:56,366 INFO L225 Difference]: With dead ends: 1816 [2021-11-13 17:47:56,366 INFO L226 Difference]: Without dead ends: 990 [2021-11-13 17:47:56,368 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:56,369 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 101 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2420.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.52ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2533.82ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:56,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 626 Invalid, 280 Unknown, 0 Unchecked, 5.52ms Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2533.82ms Time] [2021-11-13 17:47:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-11-13 17:47:56,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 849. [2021-11-13 17:47:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.5011792452830188) internal successors, (1273), 848 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1273 transitions. [2021-11-13 17:47:56,407 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1273 transitions. Word has length 186 [2021-11-13 17:47:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:56,408 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1273 transitions. [2021-11-13 17:47:56,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1273 transitions. [2021-11-13 17:47:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 17:47:56,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:56,412 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:56,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-13 17:47:56,413 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:56,414 INFO L85 PathProgramCache]: Analyzing trace with hash -547280144, now seen corresponding path program 1 times [2021-11-13 17:47:56,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:56,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124769308] [2021-11-13 17:47:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:56,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:47:56,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:56,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124769308] [2021-11-13 17:47:56,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124769308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:56,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:56,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:56,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080863095] [2021-11-13 17:47:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:56,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:56,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:56,539 INFO L87 Difference]: Start difference. First operand 849 states and 1273 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:58,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:47:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:59,027 INFO L93 Difference]: Finished difference Result 1816 states and 2726 transitions. [2021-11-13 17:47:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:59,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-13 17:47:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:59,035 INFO L225 Difference]: With dead ends: 1816 [2021-11-13 17:47:59,036 INFO L226 Difference]: Without dead ends: 990 [2021-11-13 17:47:59,037 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:47:59,038 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 105 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2329.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2440.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:59,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 624 Invalid, 280 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2440.38ms Time] [2021-11-13 17:47:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-11-13 17:47:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 849. [2021-11-13 17:47:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.4988207547169812) internal successors, (1271), 848 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1271 transitions. [2021-11-13 17:47:59,077 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1271 transitions. Word has length 187 [2021-11-13 17:47:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:59,078 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1271 transitions. [2021-11-13 17:47:59,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1271 transitions. [2021-11-13 17:47:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 17:47:59,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:59,082 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:59,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-13 17:47:59,082 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1736459904, now seen corresponding path program 1 times [2021-11-13 17:47:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:59,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874098623] [2021-11-13 17:47:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:59,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 17:47:59,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:59,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874098623] [2021-11-13 17:47:59,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874098623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:59,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:59,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:59,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111749739] [2021-11-13 17:47:59,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:59,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:59,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:59,188 INFO L87 Difference]: Start difference. First operand 849 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:01,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:01,836 INFO L93 Difference]: Finished difference Result 1894 states and 2835 transitions. [2021-11-13 17:48:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:01,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-13 17:48:01,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:01,845 INFO L225 Difference]: With dead ends: 1894 [2021-11-13 17:48:01,845 INFO L226 Difference]: Without dead ends: 1068 [2021-11-13 17:48:01,848 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:01,848 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 97 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2463.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.52ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2587.94ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:01,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 629 Invalid, 287 Unknown, 0 Unchecked, 2.52ms Time], IncrementalHoareTripleChecker [12 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 2587.94ms Time] [2021-11-13 17:48:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-13 17:48:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 840. [2021-11-13 17:48:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.4946364719904648) internal successors, (1254), 839 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1254 transitions. [2021-11-13 17:48:01,890 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1254 transitions. Word has length 187 [2021-11-13 17:48:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:01,890 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1254 transitions. [2021-11-13 17:48:01,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1254 transitions. [2021-11-13 17:48:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 17:48:01,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:01,895 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:01,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-13 17:48:01,896 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:01,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1189288488, now seen corresponding path program 1 times [2021-11-13 17:48:01,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:01,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074711671] [2021-11-13 17:48:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:01,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:02,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:02,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074711671] [2021-11-13 17:48:02,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074711671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:02,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:02,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:02,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769201625] [2021-11-13 17:48:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:02,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:02,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:02,003 INFO L87 Difference]: Start difference. First operand 840 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:04,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:04,512 INFO L93 Difference]: Finished difference Result 1810 states and 2708 transitions. [2021-11-13 17:48:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:04,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-13 17:48:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:04,519 INFO L225 Difference]: With dead ends: 1810 [2021-11-13 17:48:04,520 INFO L226 Difference]: Without dead ends: 993 [2021-11-13 17:48:04,521 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:04,522 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 103 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2370.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2464.06ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:04,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 622 Invalid, 280 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2464.06ms Time] [2021-11-13 17:48:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-11-13 17:48:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 840. [2021-11-13 17:48:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.4922526817640047) internal successors, (1252), 839 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1252 transitions. [2021-11-13 17:48:04,560 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1252 transitions. Word has length 188 [2021-11-13 17:48:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:04,561 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1252 transitions. [2021-11-13 17:48:04,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1252 transitions. [2021-11-13 17:48:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:48:04,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:04,565 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:04,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-13 17:48:04,566 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash 804114132, now seen corresponding path program 1 times [2021-11-13 17:48:04,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:04,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339717387] [2021-11-13 17:48:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:04,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:04,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:04,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339717387] [2021-11-13 17:48:04,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339717387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:04,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:04,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:04,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907082084] [2021-11-13 17:48:04,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:04,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:04,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:04,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:04,681 INFO L87 Difference]: Start difference. First operand 840 states and 1252 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:06,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:07,165 INFO L93 Difference]: Finished difference Result 1810 states and 2704 transitions. [2021-11-13 17:48:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:07,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-13 17:48:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:07,173 INFO L225 Difference]: With dead ends: 1810 [2021-11-13 17:48:07,173 INFO L226 Difference]: Without dead ends: 993 [2021-11-13 17:48:07,175 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:07,176 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 96 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2338.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2439.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:07,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 620 Invalid, 280 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2439.42ms Time] [2021-11-13 17:48:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-11-13 17:48:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 844. [2021-11-13 17:48:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.4922894424673785) internal successors, (1258), 843 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1258 transitions. [2021-11-13 17:48:07,214 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1258 transitions. Word has length 189 [2021-11-13 17:48:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:07,215 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1258 transitions. [2021-11-13 17:48:07,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1258 transitions. [2021-11-13 17:48:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:48:07,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:07,219 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:07,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-13 17:48:07,219 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash -533214923, now seen corresponding path program 1 times [2021-11-13 17:48:07,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:07,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357243345] [2021-11-13 17:48:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:07,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:07,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:07,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357243345] [2021-11-13 17:48:07,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357243345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:07,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:07,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:07,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051861252] [2021-11-13 17:48:07,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:07,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:07,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:07,320 INFO L87 Difference]: Start difference. First operand 844 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:09,340 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:09,814 INFO L93 Difference]: Finished difference Result 1814 states and 2708 transitions. [2021-11-13 17:48:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:09,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-13 17:48:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:09,820 INFO L225 Difference]: With dead ends: 1814 [2021-11-13 17:48:09,821 INFO L226 Difference]: Without dead ends: 993 [2021-11-13 17:48:09,822 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:09,822 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 100 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2361.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2453.25ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:09,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 618 Invalid, 280 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2453.25ms Time] [2021-11-13 17:48:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-11-13 17:48:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 844. [2021-11-13 17:48:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.4899169632265719) internal successors, (1256), 843 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1256 transitions. [2021-11-13 17:48:09,861 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1256 transitions. Word has length 189 [2021-11-13 17:48:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1256 transitions. [2021-11-13 17:48:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1256 transitions. [2021-11-13 17:48:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 17:48:09,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:09,866 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:09,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-13 17:48:09,867 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1708692157, now seen corresponding path program 1 times [2021-11-13 17:48:09,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:09,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140520701] [2021-11-13 17:48:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:09,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:09,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:09,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140520701] [2021-11-13 17:48:09,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140520701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:09,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:09,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:09,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253488949] [2021-11-13 17:48:09,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:09,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:09,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:09,970 INFO L87 Difference]: Start difference. First operand 844 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:11,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:12,418 INFO L93 Difference]: Finished difference Result 1794 states and 2680 transitions. [2021-11-13 17:48:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:12,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-11-13 17:48:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:12,426 INFO L225 Difference]: With dead ends: 1794 [2021-11-13 17:48:12,426 INFO L226 Difference]: Without dead ends: 973 [2021-11-13 17:48:12,428 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:12,428 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 91 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2316.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2406.56ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:12,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 604 Invalid, 263 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [5 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2406.56ms Time] [2021-11-13 17:48:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-13 17:48:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 844. [2021-11-13 17:48:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.4875444839857652) internal successors, (1254), 843 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1254 transitions. [2021-11-13 17:48:12,483 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1254 transitions. Word has length 190 [2021-11-13 17:48:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:12,484 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1254 transitions. [2021-11-13 17:48:12,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1254 transitions. [2021-11-13 17:48:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 17:48:12,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:12,488 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:12,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-13 17:48:12,489 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash 854731063, now seen corresponding path program 1 times [2021-11-13 17:48:12,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:12,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640465864] [2021-11-13 17:48:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:12,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:12,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:12,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640465864] [2021-11-13 17:48:12,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640465864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:12,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:12,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:12,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307706546] [2021-11-13 17:48:12,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:12,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:12,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:12,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:12,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:12,592 INFO L87 Difference]: Start difference. First operand 844 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:14,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:15,039 INFO L93 Difference]: Finished difference Result 1794 states and 2676 transitions. [2021-11-13 17:48:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-11-13 17:48:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:15,045 INFO L225 Difference]: With dead ends: 1794 [2021-11-13 17:48:15,045 INFO L226 Difference]: Without dead ends: 973 [2021-11-13 17:48:15,047 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:15,047 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 85 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2321.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2408.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:15,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 602 Invalid, 263 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [5 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2408.05ms Time] [2021-11-13 17:48:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-13 17:48:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 846. [2021-11-13 17:48:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.4863905325443787) internal successors, (1256), 845 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1256 transitions. [2021-11-13 17:48:15,085 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1256 transitions. Word has length 190 [2021-11-13 17:48:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:15,085 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1256 transitions. [2021-11-13 17:48:15,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1256 transitions. [2021-11-13 17:48:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-13 17:48:15,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:15,090 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:15,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-13 17:48:15,090 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1473420593, now seen corresponding path program 1 times [2021-11-13 17:48:15,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:15,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205174363] [2021-11-13 17:48:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:15,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:15,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:15,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205174363] [2021-11-13 17:48:15,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205174363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:15,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:15,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:15,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710418032] [2021-11-13 17:48:15,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:15,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:15,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:15,229 INFO L87 Difference]: Start difference. First operand 846 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:17,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:17,649 INFO L93 Difference]: Finished difference Result 1789 states and 2667 transitions. [2021-11-13 17:48:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-13 17:48:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:17,655 INFO L225 Difference]: With dead ends: 1789 [2021-11-13 17:48:17,655 INFO L226 Difference]: Without dead ends: 966 [2021-11-13 17:48:17,656 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:17,658 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 81 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2299.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2383.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:17,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 596 Invalid, 257 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2383.09ms Time] [2021-11-13 17:48:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-13 17:48:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 848. [2021-11-13 17:48:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 1.4852420306965761) internal successors, (1258), 847 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1258 transitions. [2021-11-13 17:48:17,697 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1258 transitions. Word has length 191 [2021-11-13 17:48:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:17,697 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 1258 transitions. [2021-11-13 17:48:17,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1258 transitions. [2021-11-13 17:48:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-13 17:48:17,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:17,701 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:17,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-13 17:48:17,701 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2016354090, now seen corresponding path program 2 times [2021-11-13 17:48:17,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:17,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744665198] [2021-11-13 17:48:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:17,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 17:48:17,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:17,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744665198] [2021-11-13 17:48:17,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744665198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:17,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:17,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:17,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495416122] [2021-11-13 17:48:17,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:17,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:17,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:17,809 INFO L87 Difference]: Start difference. First operand 848 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:19,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:20,240 INFO L93 Difference]: Finished difference Result 1791 states and 2667 transitions. [2021-11-13 17:48:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:20,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-11-13 17:48:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:20,247 INFO L225 Difference]: With dead ends: 1791 [2021-11-13 17:48:20,248 INFO L226 Difference]: Without dead ends: 966 [2021-11-13 17:48:20,249 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:20,250 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 77 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2301.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2393.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:20,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 594 Invalid, 257 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2393.27ms Time] [2021-11-13 17:48:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-13 17:48:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 854. [2021-11-13 17:48:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 1.481828839390387) internal successors, (1264), 853 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1264 transitions. [2021-11-13 17:48:20,290 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1264 transitions. Word has length 194 [2021-11-13 17:48:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:20,290 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1264 transitions. [2021-11-13 17:48:20,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1264 transitions. [2021-11-13 17:48:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 17:48:20,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:20,294 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:20,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-13 17:48:20,295 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:20,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:20,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2117591762, now seen corresponding path program 1 times [2021-11-13 17:48:20,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:20,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988670563] [2021-11-13 17:48:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:20,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 17:48:20,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:20,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988670563] [2021-11-13 17:48:20,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988670563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:20,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:20,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:20,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150217578] [2021-11-13 17:48:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:20,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:20,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:20,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:20,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:20,397 INFO L87 Difference]: Start difference. First operand 854 states and 1264 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:22,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:22,822 INFO L93 Difference]: Finished difference Result 1789 states and 2661 transitions. [2021-11-13 17:48:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 17:48:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:22,829 INFO L225 Difference]: With dead ends: 1789 [2021-11-13 17:48:22,830 INFO L226 Difference]: Without dead ends: 958 [2021-11-13 17:48:22,831 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:22,832 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 71 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2296.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2384.77ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:22,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 586 Invalid, 252 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [4 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2384.77ms Time] [2021-11-13 17:48:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-13 17:48:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 856. [2021-11-13 17:48:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.4807017543859649) internal successors, (1266), 855 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1266 transitions. [2021-11-13 17:48:22,871 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1266 transitions. Word has length 195 [2021-11-13 17:48:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1266 transitions. [2021-11-13 17:48:22,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1266 transitions. [2021-11-13 17:48:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-13 17:48:22,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:22,875 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:22,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-13 17:48:22,876 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1966942231, now seen corresponding path program 1 times [2021-11-13 17:48:22,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:22,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128593054] [2021-11-13 17:48:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:22,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:22,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:22,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128593054] [2021-11-13 17:48:22,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128593054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:22,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:22,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:22,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298511588] [2021-11-13 17:48:22,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:22,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:22,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:22,989 INFO L87 Difference]: Start difference. First operand 856 states and 1266 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:25,002 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:25,396 INFO L93 Difference]: Finished difference Result 1791 states and 2661 transitions. [2021-11-13 17:48:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-11-13 17:48:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:25,402 INFO L225 Difference]: With dead ends: 1791 [2021-11-13 17:48:25,402 INFO L226 Difference]: Without dead ends: 958 [2021-11-13 17:48:25,410 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:25,411 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 67 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2286.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2368.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:25,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 584 Invalid, 252 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [4 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2368.35ms Time] [2021-11-13 17:48:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-13 17:48:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 862. [2021-11-13 17:48:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.4819976771196284) internal successors, (1276), 861 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1276 transitions. [2021-11-13 17:48:25,453 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1276 transitions. Word has length 197 [2021-11-13 17:48:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:25,453 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1276 transitions. [2021-11-13 17:48:25,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1276 transitions. [2021-11-13 17:48:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-13 17:48:25,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:25,457 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:25,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-13 17:48:25,458 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash -733301295, now seen corresponding path program 1 times [2021-11-13 17:48:25,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:25,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110895088] [2021-11-13 17:48:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:25,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:25,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:25,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110895088] [2021-11-13 17:48:25,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110895088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:25,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:25,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:25,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971024936] [2021-11-13 17:48:25,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:25,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:25,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:25,575 INFO L87 Difference]: Start difference. First operand 862 states and 1276 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:27,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:27,961 INFO L93 Difference]: Finished difference Result 1781 states and 2643 transitions. [2021-11-13 17:48:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-11-13 17:48:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:27,965 INFO L225 Difference]: With dead ends: 1781 [2021-11-13 17:48:27,965 INFO L226 Difference]: Without dead ends: 942 [2021-11-13 17:48:27,967 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:27,967 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 56 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2270.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2350.30ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:27,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 574 Invalid, 230 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2350.30ms Time] [2021-11-13 17:48:27,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-13 17:48:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 864. [2021-11-13 17:48:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 1.4808806488991888) internal successors, (1278), 863 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1278 transitions. [2021-11-13 17:48:28,002 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1278 transitions. Word has length 198 [2021-11-13 17:48:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:28,003 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1278 transitions. [2021-11-13 17:48:28,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1278 transitions. [2021-11-13 17:48:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 17:48:28,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:28,005 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:28,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-13 17:48:28,006 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 467049430, now seen corresponding path program 1 times [2021-11-13 17:48:28,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:28,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431360631] [2021-11-13 17:48:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:28,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:48:28,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:28,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431360631] [2021-11-13 17:48:28,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431360631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:28,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:28,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:28,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632841147] [2021-11-13 17:48:28,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:28,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:28,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:28,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:28,105 INFO L87 Difference]: Start difference. First operand 864 states and 1278 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:30,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:30,631 INFO L93 Difference]: Finished difference Result 1921 states and 2843 transitions. [2021-11-13 17:48:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:30,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-13 17:48:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:30,659 INFO L225 Difference]: With dead ends: 1921 [2021-11-13 17:48:30,659 INFO L226 Difference]: Without dead ends: 1080 [2021-11-13 17:48:30,660 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:30,661 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 103 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2348.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2454.65ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:30,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 627 Invalid, 287 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [12 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 2454.65ms Time] [2021-11-13 17:48:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-13 17:48:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 864. [2021-11-13 17:48:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 1.477404403244496) internal successors, (1275), 863 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1275 transitions. [2021-11-13 17:48:30,704 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1275 transitions. Word has length 199 [2021-11-13 17:48:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:30,704 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1275 transitions. [2021-11-13 17:48:30,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1275 transitions. [2021-11-13 17:48:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 17:48:30,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:30,708 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:30,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-13 17:48:30,709 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1191283729, now seen corresponding path program 1 times [2021-11-13 17:48:30,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:30,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321995395] [2021-11-13 17:48:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:30,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:30,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:30,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321995395] [2021-11-13 17:48:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321995395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:30,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:30,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:30,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893147377] [2021-11-13 17:48:30,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:30,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:30,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:30,814 INFO L87 Difference]: Start difference. First operand 864 states and 1275 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:32,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:33,206 INFO L93 Difference]: Finished difference Result 1783 states and 2637 transitions. [2021-11-13 17:48:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-13 17:48:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:33,209 INFO L225 Difference]: With dead ends: 1783 [2021-11-13 17:48:33,209 INFO L226 Difference]: Without dead ends: 942 [2021-11-13 17:48:33,210 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:33,211 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 54 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2281.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2352.90ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:33,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 572 Invalid, 230 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2352.90ms Time] [2021-11-13 17:48:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-13 17:48:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 866. [2021-11-13 17:48:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.476300578034682) internal successors, (1277), 865 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1277 transitions. [2021-11-13 17:48:33,244 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1277 transitions. Word has length 199 [2021-11-13 17:48:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:33,244 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1277 transitions. [2021-11-13 17:48:33,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1277 transitions. [2021-11-13 17:48:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 17:48:33,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:33,247 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:33,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-13 17:48:33,247 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1264326698, now seen corresponding path program 1 times [2021-11-13 17:48:33,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:33,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690312455] [2021-11-13 17:48:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:33,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:48:33,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:33,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690312455] [2021-11-13 17:48:33,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690312455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:33,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:33,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:33,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466123452] [2021-11-13 17:48:33,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:33,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:33,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:33,366 INFO L87 Difference]: Start difference. First operand 866 states and 1277 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:35,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:35,818 INFO L93 Difference]: Finished difference Result 1919 states and 2835 transitions. [2021-11-13 17:48:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-13 17:48:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:35,821 INFO L225 Difference]: With dead ends: 1919 [2021-11-13 17:48:35,821 INFO L226 Difference]: Without dead ends: 1076 [2021-11-13 17:48:35,822 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:35,822 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 101 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2318.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2405.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:35,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 625 Invalid, 281 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2405.21ms Time] [2021-11-13 17:48:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-11-13 17:48:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 866. [2021-11-13 17:48:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.4728323699421966) internal successors, (1274), 865 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1274 transitions. [2021-11-13 17:48:35,865 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1274 transitions. Word has length 200 [2021-11-13 17:48:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:35,865 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1274 transitions. [2021-11-13 17:48:35,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1274 transitions. [2021-11-13 17:48:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 17:48:35,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:35,869 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:35,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-13 17:48:35,870 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:35,870 INFO L85 PathProgramCache]: Analyzing trace with hash -204984161, now seen corresponding path program 1 times [2021-11-13 17:48:35,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:35,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996607732] [2021-11-13 17:48:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:35,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:35,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:35,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996607732] [2021-11-13 17:48:35,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996607732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:35,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:35,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:35,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977997390] [2021-11-13 17:48:35,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:35,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:35,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:35,978 INFO L87 Difference]: Start difference. First operand 866 states and 1274 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:37,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:38,370 INFO L93 Difference]: Finished difference Result 1785 states and 2631 transitions. [2021-11-13 17:48:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-13 17:48:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:38,372 INFO L225 Difference]: With dead ends: 1785 [2021-11-13 17:48:38,372 INFO L226 Difference]: Without dead ends: 942 [2021-11-13 17:48:38,373 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:38,374 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 57 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2268.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2349.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:38,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 570 Invalid, 230 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2349.26ms Time] [2021-11-13 17:48:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-13 17:48:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 866. [2021-11-13 17:48:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.4705202312138728) internal successors, (1272), 865 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1272 transitions. [2021-11-13 17:48:38,413 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1272 transitions. Word has length 200 [2021-11-13 17:48:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:38,414 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1272 transitions. [2021-11-13 17:48:38,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1272 transitions. [2021-11-13 17:48:38,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 17:48:38,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:38,417 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:38,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-13 17:48:38,418 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:38,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1692506231, now seen corresponding path program 1 times [2021-11-13 17:48:38,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:38,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898442761] [2021-11-13 17:48:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:38,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:38,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:38,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898442761] [2021-11-13 17:48:38,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898442761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:38,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:38,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:38,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455522519] [2021-11-13 17:48:38,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:38,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:38,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:38,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:38,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:38,520 INFO L87 Difference]: Start difference. First operand 866 states and 1272 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:40,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:40,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:40,896 INFO L93 Difference]: Finished difference Result 1781 states and 2623 transitions. [2021-11-13 17:48:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:40,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-13 17:48:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:40,899 INFO L225 Difference]: With dead ends: 1781 [2021-11-13 17:48:40,899 INFO L226 Difference]: Without dead ends: 938 [2021-11-13 17:48:40,900 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:40,900 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 50 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2255.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2334.86ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:40,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 566 Invalid, 227 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 2334.86ms Time] [2021-11-13 17:48:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-13 17:48:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 868. [2021-11-13 17:48:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.469434832756632) internal successors, (1274), 867 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1274 transitions. [2021-11-13 17:48:40,945 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1274 transitions. Word has length 200 [2021-11-13 17:48:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:40,946 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1274 transitions. [2021-11-13 17:48:40,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1274 transitions. [2021-11-13 17:48:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 17:48:40,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:40,950 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:40,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-13 17:48:40,950 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash 45892090, now seen corresponding path program 1 times [2021-11-13 17:48:40,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:40,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955707463] [2021-11-13 17:48:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:40,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:48:41,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:41,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955707463] [2021-11-13 17:48:41,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955707463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:41,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:41,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:41,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137745463] [2021-11-13 17:48:41,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:41,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:41,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:41,066 INFO L87 Difference]: Start difference. First operand 868 states and 1274 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:43,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:43,531 INFO L93 Difference]: Finished difference Result 1923 states and 2829 transitions. [2021-11-13 17:48:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-13 17:48:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:43,534 INFO L225 Difference]: With dead ends: 1923 [2021-11-13 17:48:43,534 INFO L226 Difference]: Without dead ends: 1078 [2021-11-13 17:48:43,535 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:43,536 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 105 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2322.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2411.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:43,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 623 Invalid, 281 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2411.26ms Time] [2021-11-13 17:48:43,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-11-13 17:48:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 868. [2021-11-13 17:48:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.4659746251441754) internal successors, (1271), 867 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1271 transitions. [2021-11-13 17:48:43,581 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1271 transitions. Word has length 201 [2021-11-13 17:48:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:43,581 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1271 transitions. [2021-11-13 17:48:43,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1271 transitions. [2021-11-13 17:48:43,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 17:48:43,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:43,585 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:43,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-13 17:48:43,585 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1437011543, now seen corresponding path program 1 times [2021-11-13 17:48:43,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:43,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542695132] [2021-11-13 17:48:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:43,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:43,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:43,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542695132] [2021-11-13 17:48:43,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542695132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:43,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:43,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:43,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714310235] [2021-11-13 17:48:43,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:43,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:43,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:43,698 INFO L87 Difference]: Start difference. First operand 868 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:45,711 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:46,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:46,048 INFO L93 Difference]: Finished difference Result 1779 states and 2611 transitions. [2021-11-13 17:48:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:46,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-13 17:48:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:46,051 INFO L225 Difference]: With dead ends: 1779 [2021-11-13 17:48:46,051 INFO L226 Difference]: Without dead ends: 934 [2021-11-13 17:48:46,053 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:46,053 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 52 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2239.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2307.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:46,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 564 Invalid, 219 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [4 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2307.75ms Time] [2021-11-13 17:48:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-11-13 17:48:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 868. [2021-11-13 17:48:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.4636678200692042) internal successors, (1269), 867 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1269 transitions. [2021-11-13 17:48:46,092 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1269 transitions. Word has length 201 [2021-11-13 17:48:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:46,093 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1269 transitions. [2021-11-13 17:48:46,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1269 transitions. [2021-11-13 17:48:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 17:48:46,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:46,095 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:46,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-13 17:48:46,095 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2062078927, now seen corresponding path program 1 times [2021-11-13 17:48:46,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:46,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832914487] [2021-11-13 17:48:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:46,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:46,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:46,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832914487] [2021-11-13 17:48:46,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832914487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:46,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:46,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:46,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689427496] [2021-11-13 17:48:46,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:46,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:46,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:46,199 INFO L87 Difference]: Start difference. First operand 868 states and 1269 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:48,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:48,570 INFO L93 Difference]: Finished difference Result 1773 states and 2599 transitions. [2021-11-13 17:48:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:48,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-13 17:48:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:48,573 INFO L225 Difference]: With dead ends: 1773 [2021-11-13 17:48:48,573 INFO L226 Difference]: Without dead ends: 928 [2021-11-13 17:48:48,574 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:48,574 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 45 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2255.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2331.66ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:48,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 560 Invalid, 210 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2331.66ms Time] [2021-11-13 17:48:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-11-13 17:48:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 870. [2021-11-13 17:48:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.4626006904487918) internal successors, (1271), 869 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1271 transitions. [2021-11-13 17:48:48,610 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1271 transitions. Word has length 201 [2021-11-13 17:48:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:48,610 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1271 transitions. [2021-11-13 17:48:48,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1271 transitions. [2021-11-13 17:48:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-13 17:48:48,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:48,614 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:48,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-13 17:48:48,614 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:48,615 INFO L85 PathProgramCache]: Analyzing trace with hash 19181582, now seen corresponding path program 1 times [2021-11-13 17:48:48,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:48,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681253037] [2021-11-13 17:48:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:48,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:48:48,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:48,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681253037] [2021-11-13 17:48:48,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681253037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:48,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:48,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:48,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472018258] [2021-11-13 17:48:48,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:48,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:48,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:48,714 INFO L87 Difference]: Start difference. First operand 870 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:50,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:51,217 INFO L93 Difference]: Finished difference Result 1927 states and 2823 transitions. [2021-11-13 17:48:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:51,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-13 17:48:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:51,220 INFO L225 Difference]: With dead ends: 1927 [2021-11-13 17:48:51,220 INFO L226 Difference]: Without dead ends: 1080 [2021-11-13 17:48:51,221 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:51,221 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 103 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2333.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2424.49ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:51,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 621 Invalid, 281 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2424.49ms Time] [2021-11-13 17:48:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-13 17:48:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 870. [2021-11-13 17:48:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.4591484464902187) internal successors, (1268), 869 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1268 transitions. [2021-11-13 17:48:51,268 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1268 transitions. Word has length 202 [2021-11-13 17:48:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:51,269 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1268 transitions. [2021-11-13 17:48:51,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1268 transitions. [2021-11-13 17:48:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-13 17:48:51,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:51,272 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:51,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-13 17:48:51,273 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash -388019362, now seen corresponding path program 1 times [2021-11-13 17:48:51,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:51,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216811904] [2021-11-13 17:48:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:51,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:48:51,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:51,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216811904] [2021-11-13 17:48:51,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216811904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:51,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:51,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:51,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847626100] [2021-11-13 17:48:51,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:51,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:51,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:51,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:51,374 INFO L87 Difference]: Start difference. First operand 870 states and 1268 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:53,386 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:53,846 INFO L93 Difference]: Finished difference Result 1927 states and 2817 transitions. [2021-11-13 17:48:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:53,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-13 17:48:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:53,850 INFO L225 Difference]: With dead ends: 1927 [2021-11-13 17:48:53,850 INFO L226 Difference]: Without dead ends: 1080 [2021-11-13 17:48:53,852 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:53,852 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 96 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2328.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2418.14ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:53,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 619 Invalid, 281 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2418.14ms Time] [2021-11-13 17:48:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-13 17:48:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 870. [2021-11-13 17:48:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.4556962025316456) internal successors, (1265), 869 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1265 transitions. [2021-11-13 17:48:53,905 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1265 transitions. Word has length 203 [2021-11-13 17:48:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:53,906 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1265 transitions. [2021-11-13 17:48:53,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1265 transitions. [2021-11-13 17:48:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-13 17:48:53,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:53,908 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:53,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-13 17:48:53,908 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:53,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1725348417, now seen corresponding path program 1 times [2021-11-13 17:48:53,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:53,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556264248] [2021-11-13 17:48:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:53,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:48:54,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:54,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556264248] [2021-11-13 17:48:54,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556264248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:54,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:54,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:54,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675203035] [2021-11-13 17:48:54,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:54,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:54,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:54,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:54,028 INFO L87 Difference]: Start difference. First operand 870 states and 1265 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:56,040 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:56,497 INFO L93 Difference]: Finished difference Result 1927 states and 2811 transitions. [2021-11-13 17:48:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-13 17:48:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:56,500 INFO L225 Difference]: With dead ends: 1927 [2021-11-13 17:48:56,500 INFO L226 Difference]: Without dead ends: 1080 [2021-11-13 17:48:56,501 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:56,502 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 100 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2323.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2414.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:56,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 617 Invalid, 281 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2414.35ms Time] [2021-11-13 17:48:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-13 17:48:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 870. [2021-11-13 17:48:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.4522439585730724) internal successors, (1262), 869 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1262 transitions. [2021-11-13 17:48:56,534 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1262 transitions. Word has length 203 [2021-11-13 17:48:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:56,534 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1262 transitions. [2021-11-13 17:48:56,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1262 transitions. [2021-11-13 17:48:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-13 17:48:56,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:56,537 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:56,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-13 17:48:56,537 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2120072053, now seen corresponding path program 1 times [2021-11-13 17:48:56,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:56,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436065838] [2021-11-13 17:48:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:56,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:48:56,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:56,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436065838] [2021-11-13 17:48:56,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436065838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:56,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:56,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:56,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730316161] [2021-11-13 17:48:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:56,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:56,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:56,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:56,642 INFO L87 Difference]: Start difference. First operand 870 states and 1262 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:58,656 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:59,005 INFO L93 Difference]: Finished difference Result 1775 states and 2581 transitions. [2021-11-13 17:48:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:48:59,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-13 17:48:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:59,007 INFO L225 Difference]: With dead ends: 1775 [2021-11-13 17:48:59,007 INFO L226 Difference]: Without dead ends: 928 [2021-11-13 17:48:59,008 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:48:59,009 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 43 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2246.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2319.56ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:59,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 558 Invalid, 210 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2319.56ms Time] [2021-11-13 17:48:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-11-13 17:48:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 872. [2021-11-13 17:48:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.4512055109070034) internal successors, (1264), 871 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1264 transitions. [2021-11-13 17:48:59,039 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1264 transitions. Word has length 203 [2021-11-13 17:48:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:59,039 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1264 transitions. [2021-11-13 17:48:59,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1264 transitions. [2021-11-13 17:48:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-13 17:48:59,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:59,041 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:59,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-13 17:48:59,042 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash -887707789, now seen corresponding path program 1 times [2021-11-13 17:48:59,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:59,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389494844] [2021-11-13 17:48:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:59,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:48:59,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:59,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389494844] [2021-11-13 17:48:59,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389494844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:59,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:59,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421313904] [2021-11-13 17:48:59,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:59,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:59,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:59,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:59,140 INFO L87 Difference]: Start difference. First operand 872 states and 1264 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:01,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:01,609 INFO L93 Difference]: Finished difference Result 1901 states and 2773 transitions. [2021-11-13 17:49:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-13 17:49:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:01,612 INFO L225 Difference]: With dead ends: 1901 [2021-11-13 17:49:01,612 INFO L226 Difference]: Without dead ends: 1052 [2021-11-13 17:49:01,613 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:01,613 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 91 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2320.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2413.20ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:01,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 603 Invalid, 264 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [7 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2413.20ms Time] [2021-11-13 17:49:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-13 17:49:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 872. [2021-11-13 17:49:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.4477611940298507) internal successors, (1261), 871 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1261 transitions. [2021-11-13 17:49:01,650 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1261 transitions. Word has length 204 [2021-11-13 17:49:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:01,650 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1261 transitions. [2021-11-13 17:49:01,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1261 transitions. [2021-11-13 17:49:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-13 17:49:01,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:01,653 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:01,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-13 17:49:01,653 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1741668883, now seen corresponding path program 1 times [2021-11-13 17:49:01,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:01,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778420315] [2021-11-13 17:49:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:01,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:49:01,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:01,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778420315] [2021-11-13 17:49:01,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778420315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:01,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:01,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:01,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171754213] [2021-11-13 17:49:01,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:01,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:01,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:01,753 INFO L87 Difference]: Start difference. First operand 872 states and 1261 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:03,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:04,216 INFO L93 Difference]: Finished difference Result 1901 states and 2767 transitions. [2021-11-13 17:49:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-13 17:49:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:04,219 INFO L225 Difference]: With dead ends: 1901 [2021-11-13 17:49:04,219 INFO L226 Difference]: Without dead ends: 1052 [2021-11-13 17:49:04,221 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:04,221 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 85 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2312.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2405.60ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:04,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 601 Invalid, 264 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [7 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2405.60ms Time] [2021-11-13 17:49:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-13 17:49:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 872. [2021-11-13 17:49:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.444316877152698) internal successors, (1258), 871 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1258 transitions. [2021-11-13 17:49:04,273 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1258 transitions. Word has length 204 [2021-11-13 17:49:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:04,274 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1258 transitions. [2021-11-13 17:49:04,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1258 transitions. [2021-11-13 17:49:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-13 17:49:04,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:04,277 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:04,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-11-13 17:49:04,278 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:04,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1976900664, now seen corresponding path program 1 times [2021-11-13 17:49:04,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:04,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782821307] [2021-11-13 17:49:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:04,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:49:04,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:04,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782821307] [2021-11-13 17:49:04,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782821307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:04,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:04,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:04,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81919442] [2021-11-13 17:49:04,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:04,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:04,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:04,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:04,378 INFO L87 Difference]: Start difference. First operand 872 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:06,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:06,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:06,722 INFO L93 Difference]: Finished difference Result 1769 states and 2559 transitions. [2021-11-13 17:49:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:06,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-13 17:49:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:06,729 INFO L225 Difference]: With dead ends: 1769 [2021-11-13 17:49:06,729 INFO L226 Difference]: Without dead ends: 920 [2021-11-13 17:49:06,730 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:06,731 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 38 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2227.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2297.71ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:06,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 550 Invalid, 204 Unknown, 0 Unchecked, 1.25ms Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2297.71ms Time] [2021-11-13 17:49:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-13 17:49:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 874. [2021-11-13 17:49:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.443298969072165) internal successors, (1260), 873 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1260 transitions. [2021-11-13 17:49:06,783 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1260 transitions. Word has length 204 [2021-11-13 17:49:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:06,783 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1260 transitions. [2021-11-13 17:49:06,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1260 transitions. [2021-11-13 17:49:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-13 17:49:06,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:06,786 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:06,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-13 17:49:06,787 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1724467841, now seen corresponding path program 1 times [2021-11-13 17:49:06,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:06,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072828523] [2021-11-13 17:49:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:06,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:49:06,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:06,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072828523] [2021-11-13 17:49:06,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072828523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:06,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:06,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:06,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067296863] [2021-11-13 17:49:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:06,886 INFO L87 Difference]: Start difference. First operand 874 states and 1260 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:08,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:09,293 INFO L93 Difference]: Finished difference Result 1771 states and 2559 transitions. [2021-11-13 17:49:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-13 17:49:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:09,296 INFO L225 Difference]: With dead ends: 1771 [2021-11-13 17:49:09,296 INFO L226 Difference]: Without dead ends: 920 [2021-11-13 17:49:09,297 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:09,297 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 36 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2272.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2355.81ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:09,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 548 Invalid, 204 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2355.81ms Time] [2021-11-13 17:49:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-13 17:49:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 876. [2021-11-13 17:49:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 1.4422857142857144) internal successors, (1262), 875 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1262 transitions. [2021-11-13 17:49:09,333 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1262 transitions. Word has length 204 [2021-11-13 17:49:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:09,333 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1262 transitions. [2021-11-13 17:49:09,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1262 transitions. [2021-11-13 17:49:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-13 17:49:09,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:09,337 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:09,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-13 17:49:09,337 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:09,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash -357440295, now seen corresponding path program 1 times [2021-11-13 17:49:09,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:09,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678454590] [2021-11-13 17:49:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:09,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:49:09,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:09,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678454590] [2021-11-13 17:49:09,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678454590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:09,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:09,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:09,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622528496] [2021-11-13 17:49:09,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:09,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:09,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:09,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:09,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:09,446 INFO L87 Difference]: Start difference. First operand 876 states and 1262 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:11,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:11,890 INFO L93 Difference]: Finished difference Result 1899 states and 2757 transitions. [2021-11-13 17:49:11,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:11,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-13 17:49:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:11,897 INFO L225 Difference]: With dead ends: 1899 [2021-11-13 17:49:11,897 INFO L226 Difference]: Without dead ends: 1046 [2021-11-13 17:49:11,901 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:11,902 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 81 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2297.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2384.73ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:11,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 595 Invalid, 258 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 1 Unknown, 0 Unchecked, 2384.73ms Time] [2021-11-13 17:49:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-11-13 17:49:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 876. [2021-11-13 17:49:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 1.4388571428571428) internal successors, (1259), 875 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:11,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1259 transitions. [2021-11-13 17:49:11,956 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1259 transitions. Word has length 205 [2021-11-13 17:49:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:11,957 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1259 transitions. [2021-11-13 17:49:11,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1259 transitions. [2021-11-13 17:49:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-13 17:49:11,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:11,960 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:11,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-13 17:49:11,961 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:11,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash 51978942, now seen corresponding path program 1 times [2021-11-13 17:49:11,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:11,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512547287] [2021-11-13 17:49:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:11,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:49:12,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:12,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512547287] [2021-11-13 17:49:12,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512547287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:12,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:12,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:12,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585655448] [2021-11-13 17:49:12,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:12,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:12,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:12,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:12,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:12,093 INFO L87 Difference]: Start difference. First operand 876 states and 1259 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:14,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:14,450 INFO L93 Difference]: Finished difference Result 1769 states and 2549 transitions. [2021-11-13 17:49:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-13 17:49:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:14,455 INFO L225 Difference]: With dead ends: 1769 [2021-11-13 17:49:14,455 INFO L226 Difference]: Without dead ends: 916 [2021-11-13 17:49:14,457 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:14,457 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 33 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2236.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2307.03ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:14,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 544 Invalid, 201 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2307.03ms Time] [2021-11-13 17:49:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-11-13 17:49:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 878. [2021-11-13 17:49:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 1.4378563283922463) internal successors, (1261), 877 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1261 transitions. [2021-11-13 17:49:14,510 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1261 transitions. Word has length 205 [2021-11-13 17:49:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:14,511 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1261 transitions. [2021-11-13 17:49:14,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1261 transitions. [2021-11-13 17:49:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 17:49:14,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:14,514 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:14,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-13 17:49:14,515 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash 874136582, now seen corresponding path program 1 times [2021-11-13 17:49:14,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:14,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741585298] [2021-11-13 17:49:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:14,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:49:14,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:14,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741585298] [2021-11-13 17:49:14,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741585298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:14,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:14,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:14,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752400308] [2021-11-13 17:49:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:14,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:14,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:14,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:14,616 INFO L87 Difference]: Start difference. First operand 878 states and 1261 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:16,628 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:16,974 INFO L93 Difference]: Finished difference Result 1771 states and 2549 transitions. [2021-11-13 17:49:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:16,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-13 17:49:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:16,977 INFO L225 Difference]: With dead ends: 1771 [2021-11-13 17:49:16,977 INFO L226 Difference]: Without dead ends: 916 [2021-11-13 17:49:16,979 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:16,979 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 31 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2221.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2300.85ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:16,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 542 Invalid, 201 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2300.85ms Time] [2021-11-13 17:49:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-11-13 17:49:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 880. [2021-11-13 17:49:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.4368600682593857) internal successors, (1263), 879 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1263 transitions. [2021-11-13 17:49:17,034 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1263 transitions. Word has length 206 [2021-11-13 17:49:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:17,034 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1263 transitions. [2021-11-13 17:49:17,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1263 transitions. [2021-11-13 17:49:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 17:49:17,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:17,038 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:17,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-13 17:49:17,039 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1599069789, now seen corresponding path program 1 times [2021-11-13 17:49:17,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:17,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126812015] [2021-11-13 17:49:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:17,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:49:17,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:17,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126812015] [2021-11-13 17:49:17,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126812015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:17,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:17,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:17,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150038329] [2021-11-13 17:49:17,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:17,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:17,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:17,143 INFO L87 Difference]: Start difference. First operand 880 states and 1263 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:19,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:19,487 INFO L93 Difference]: Finished difference Result 1769 states and 2545 transitions. [2021-11-13 17:49:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:19,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-11-13 17:49:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:19,513 INFO L225 Difference]: With dead ends: 1769 [2021-11-13 17:49:19,513 INFO L226 Difference]: Without dead ends: 912 [2021-11-13 17:49:19,514 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:19,515 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 28 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2217.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2288.92ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:19,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 538 Invalid, 198 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 2288.92ms Time] [2021-11-13 17:49:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-11-13 17:49:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 882. [2021-11-13 17:49:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 1.4358683314415437) internal successors, (1265), 881 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1265 transitions. [2021-11-13 17:49:19,568 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1265 transitions. Word has length 207 [2021-11-13 17:49:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:19,569 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1265 transitions. [2021-11-13 17:49:19,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1265 transitions. [2021-11-13 17:49:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 17:49:19,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:19,572 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:19,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-11-13 17:49:19,573 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1105832588, now seen corresponding path program 2 times [2021-11-13 17:49:19,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:19,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238600398] [2021-11-13 17:49:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:19,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-13 17:49:19,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:19,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238600398] [2021-11-13 17:49:19,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238600398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:19,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:19,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:19,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317518723] [2021-11-13 17:49:19,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:19,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:19,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:19,667 INFO L87 Difference]: Start difference. First operand 882 states and 1265 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:21,682 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:22,142 INFO L93 Difference]: Finished difference Result 1911 states and 2763 transitions. [2021-11-13 17:49:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-13 17:49:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:22,146 INFO L225 Difference]: With dead ends: 1911 [2021-11-13 17:49:22,146 INFO L226 Difference]: Without dead ends: 1052 [2021-11-13 17:49:22,148 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:22,148 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 77 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2309.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2400.71ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:22,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 593 Invalid, 258 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 1 Unknown, 0 Unchecked, 2400.71ms Time] [2021-11-13 17:49:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-13 17:49:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 885. [2021-11-13 17:49:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.4343891402714932) internal successors, (1268), 884 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1268 transitions. [2021-11-13 17:49:22,218 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1268 transitions. Word has length 208 [2021-11-13 17:49:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:22,218 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1268 transitions. [2021-11-13 17:49:22,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1268 transitions. [2021-11-13 17:49:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-13 17:49:22,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:22,222 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:22,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-13 17:49:22,223 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:22,223 INFO L85 PathProgramCache]: Analyzing trace with hash 180914744, now seen corresponding path program 1 times [2021-11-13 17:49:22,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:22,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530768218] [2021-11-13 17:49:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:22,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-13 17:49:22,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:22,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530768218] [2021-11-13 17:49:22,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530768218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:22,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:22,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:22,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634083540] [2021-11-13 17:49:22,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:22,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:22,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:22,322 INFO L87 Difference]: Start difference. First operand 885 states and 1268 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:24,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:24,789 INFO L93 Difference]: Finished difference Result 1902 states and 2748 transitions. [2021-11-13 17:49:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:24,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-11-13 17:49:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:24,792 INFO L225 Difference]: With dead ends: 1902 [2021-11-13 17:49:24,792 INFO L226 Difference]: Without dead ends: 1040 [2021-11-13 17:49:24,794 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:24,794 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 71 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2294.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2380.43ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:24,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 585 Invalid, 253 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2380.43ms Time] [2021-11-13 17:49:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-13 17:49:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 888. [2021-11-13 17:49:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.4329199549041713) internal successors, (1271), 887 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1271 transitions. [2021-11-13 17:49:24,887 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1271 transitions. Word has length 209 [2021-11-13 17:49:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:24,887 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1271 transitions. [2021-11-13 17:49:24,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1271 transitions. [2021-11-13 17:49:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-13 17:49:24,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:24,891 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:24,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-13 17:49:24,892 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1138713683, now seen corresponding path program 1 times [2021-11-13 17:49:24,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:24,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448294281] [2021-11-13 17:49:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:24,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:49:25,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:25,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448294281] [2021-11-13 17:49:25,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448294281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:25,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:25,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:25,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105041606] [2021-11-13 17:49:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:25,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:25,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:25,006 INFO L87 Difference]: Start difference. First operand 888 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:27,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:27,387 INFO L93 Difference]: Finished difference Result 1783 states and 2557 transitions. [2021-11-13 17:49:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:27,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-13 17:49:27,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:27,390 INFO L225 Difference]: With dead ends: 1783 [2021-11-13 17:49:27,391 INFO L226 Difference]: Without dead ends: 918 [2021-11-13 17:49:27,392 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:27,393 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 26 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2231.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2306.10ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:27,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 536 Invalid, 198 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 2306.10ms Time] [2021-11-13 17:49:27,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-11-13 17:49:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 890. [2021-11-13 17:49:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 1.4319460067491563) internal successors, (1273), 889 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1273 transitions. [2021-11-13 17:49:27,453 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1273 transitions. Word has length 210 [2021-11-13 17:49:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:27,453 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1273 transitions. [2021-11-13 17:49:27,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1273 transitions. [2021-11-13 17:49:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-13 17:49:27,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:27,458 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:27,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-13 17:49:27,460 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash -715380109, now seen corresponding path program 1 times [2021-11-13 17:49:27,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:27,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392890349] [2021-11-13 17:49:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:27,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:49:27,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:27,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392890349] [2021-11-13 17:49:27,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392890349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:27,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:27,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:27,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873198363] [2021-11-13 17:49:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:27,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:27,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:27,595 INFO L87 Difference]: Start difference. First operand 890 states and 1273 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:29,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:30,074 INFO L93 Difference]: Finished difference Result 1909 states and 2752 transitions. [2021-11-13 17:49:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:30,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-13 17:49:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:30,077 INFO L225 Difference]: With dead ends: 1909 [2021-11-13 17:49:30,078 INFO L226 Difference]: Without dead ends: 1042 [2021-11-13 17:49:30,079 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:30,080 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 67 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2306.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2391.40ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:30,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 583 Invalid, 253 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2391.40ms Time] [2021-11-13 17:49:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-11-13 17:49:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 899. [2021-11-13 17:49:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.4342984409799555) internal successors, (1288), 898 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1288 transitions. [2021-11-13 17:49:30,140 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1288 transitions. Word has length 211 [2021-11-13 17:49:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:30,141 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1288 transitions. [2021-11-13 17:49:30,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:30,141 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1288 transitions. [2021-11-13 17:49:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-13 17:49:30,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:30,144 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:30,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-13 17:49:30,145 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:30,146 INFO L85 PathProgramCache]: Analyzing trace with hash -474358934, now seen corresponding path program 1 times [2021-11-13 17:49:30,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:30,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620142575] [2021-11-13 17:49:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:30,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:49:30,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:30,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620142575] [2021-11-13 17:49:30,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620142575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:30,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:30,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:30,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977180414] [2021-11-13 17:49:30,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:30,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:30,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:30,254 INFO L87 Difference]: Start difference. First operand 899 states and 1288 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:32,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:32,642 INFO L93 Difference]: Finished difference Result 1797 states and 2579 transitions. [2021-11-13 17:49:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:32,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-13 17:49:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:32,645 INFO L225 Difference]: With dead ends: 1797 [2021-11-13 17:49:32,645 INFO L226 Difference]: Without dead ends: 921 [2021-11-13 17:49:32,647 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:32,647 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 22 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2247.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2318.25ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:32,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 532 Invalid, 190 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 1 Unknown, 0 Unchecked, 2318.25ms Time] [2021-11-13 17:49:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-13 17:49:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 901. [2021-11-13 17:49:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.4333333333333333) internal successors, (1290), 900 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1290 transitions. [2021-11-13 17:49:32,709 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1290 transitions. Word has length 211 [2021-11-13 17:49:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:32,709 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1290 transitions. [2021-11-13 17:49:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1290 transitions. [2021-11-13 17:49:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-13 17:49:32,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:32,713 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:32,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-11-13 17:49:32,713 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:32,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash -589581177, now seen corresponding path program 1 times [2021-11-13 17:49:32,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:32,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638808852] [2021-11-13 17:49:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:32,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:49:32,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:32,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638808852] [2021-11-13 17:49:32,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638808852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:32,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:32,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:32,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966310131] [2021-11-13 17:49:32,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:32,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:32,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:32,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:32,813 INFO L87 Difference]: Start difference. First operand 901 states and 1290 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:34,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:35,278 INFO L93 Difference]: Finished difference Result 1898 states and 2729 transitions. [2021-11-13 17:49:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:35,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-11-13 17:49:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:35,281 INFO L225 Difference]: With dead ends: 1898 [2021-11-13 17:49:35,282 INFO L226 Difference]: Without dead ends: 1020 [2021-11-13 17:49:35,283 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:35,283 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 56 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2284.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2384.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:35,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 573 Invalid, 231 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [6 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 2384.61ms Time] [2021-11-13 17:49:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-11-13 17:49:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 904. [2021-11-13 17:49:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.4318936877076411) internal successors, (1293), 903 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1293 transitions. [2021-11-13 17:49:35,323 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1293 transitions. Word has length 212 [2021-11-13 17:49:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:35,323 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1293 transitions. [2021-11-13 17:49:35,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1293 transitions. [2021-11-13 17:49:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-13 17:49:35,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:35,325 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:35,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-11-13 17:49:35,326 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1030927367, now seen corresponding path program 1 times [2021-11-13 17:49:35,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:35,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562697362] [2021-11-13 17:49:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:35,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:49:35,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:35,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562697362] [2021-11-13 17:49:35,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562697362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:35,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:35,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:35,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117428365] [2021-11-13 17:49:35,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:35,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:35,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:35,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:35,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:35,417 INFO L87 Difference]: Start difference. First operand 904 states and 1293 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:37,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:37,878 INFO L93 Difference]: Finished difference Result 1901 states and 2729 transitions. [2021-11-13 17:49:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-11-13 17:49:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:37,882 INFO L225 Difference]: With dead ends: 1901 [2021-11-13 17:49:37,882 INFO L226 Difference]: Without dead ends: 1020 [2021-11-13 17:49:37,883 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:37,884 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 54 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2296.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2375.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:37,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 571 Invalid, 231 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [6 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 2375.11ms Time] [2021-11-13 17:49:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-11-13 17:49:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 907. [2021-11-13 17:49:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.4304635761589404) internal successors, (1296), 906 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1296 transitions. [2021-11-13 17:49:37,945 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1296 transitions. Word has length 213 [2021-11-13 17:49:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:37,945 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1296 transitions. [2021-11-13 17:49:37,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1296 transitions. [2021-11-13 17:49:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-13 17:49:37,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:37,951 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:37,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-11-13 17:49:37,951 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash 471095765, now seen corresponding path program 1 times [2021-11-13 17:49:37,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:37,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765098422] [2021-11-13 17:49:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:37,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:49:38,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:38,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765098422] [2021-11-13 17:49:38,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765098422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:38,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:38,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:38,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960298390] [2021-11-13 17:49:38,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:38,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:38,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:38,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:38,084 INFO L87 Difference]: Start difference. First operand 907 states and 1296 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:40,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:40,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:40,501 INFO L93 Difference]: Finished difference Result 1904 states and 2729 transitions. [2021-11-13 17:49:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:40,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-13 17:49:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:40,504 INFO L225 Difference]: With dead ends: 1904 [2021-11-13 17:49:40,504 INFO L226 Difference]: Without dead ends: 1020 [2021-11-13 17:49:40,506 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:40,506 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 57 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2266.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2353.37ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:40,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 569 Invalid, 231 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [6 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 2353.37ms Time] [2021-11-13 17:49:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-11-13 17:49:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 907. [2021-11-13 17:49:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.4271523178807948) internal successors, (1293), 906 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1293 transitions. [2021-11-13 17:49:40,570 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1293 transitions. Word has length 214 [2021-11-13 17:49:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:40,571 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1293 transitions. [2021-11-13 17:49:40,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1293 transitions. [2021-11-13 17:49:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-13 17:49:40,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:40,574 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:40,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-11-13 17:49:40,575 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1926381139, now seen corresponding path program 1 times [2021-11-13 17:49:40,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:40,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369676902] [2021-11-13 17:49:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:40,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:49:40,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:40,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369676902] [2021-11-13 17:49:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369676902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:40,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:40,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:40,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975307960] [2021-11-13 17:49:40,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:40,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:40,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:40,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:40,671 INFO L87 Difference]: Start difference. First operand 907 states and 1293 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:42,684 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:43,076 INFO L93 Difference]: Finished difference Result 1898 states and 2717 transitions. [2021-11-13 17:49:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:43,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-13 17:49:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:43,078 INFO L225 Difference]: With dead ends: 1898 [2021-11-13 17:49:43,078 INFO L226 Difference]: Without dead ends: 1014 [2021-11-13 17:49:43,079 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:43,079 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 50 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2252.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2328.40ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:43,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 565 Invalid, 228 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [6 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 2328.40ms Time] [2021-11-13 17:49:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-11-13 17:49:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 910. [2021-11-13 17:49:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.4257425742574257) internal successors, (1296), 909 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1296 transitions. [2021-11-13 17:49:43,121 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1296 transitions. Word has length 214 [2021-11-13 17:49:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:43,121 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1296 transitions. [2021-11-13 17:49:43,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1296 transitions. [2021-11-13 17:49:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 17:49:43,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:43,124 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:43,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-11-13 17:49:43,124 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash 920652769, now seen corresponding path program 1 times [2021-11-13 17:49:43,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:43,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801813932] [2021-11-13 17:49:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:43,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 17:49:43,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:43,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801813932] [2021-11-13 17:49:43,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801813932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:43,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:43,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:43,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379845270] [2021-11-13 17:49:43,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:43,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:43,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:43,220 INFO L87 Difference]: Start difference. First operand 910 states and 1296 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:45,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:45,609 INFO L93 Difference]: Finished difference Result 1895 states and 2708 transitions. [2021-11-13 17:49:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-11-13 17:49:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:45,611 INFO L225 Difference]: With dead ends: 1895 [2021-11-13 17:49:45,611 INFO L226 Difference]: Without dead ends: 1008 [2021-11-13 17:49:45,612 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:45,612 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 52 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2241.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2315.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:45,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 563 Invalid, 220 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [6 Valid, 213 Invalid, 1 Unknown, 0 Unchecked, 2315.08ms Time] [2021-11-13 17:49:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-11-13 17:49:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 910. [2021-11-13 17:49:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.4224422442244224) internal successors, (1293), 909 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1293 transitions. [2021-11-13 17:49:45,660 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1293 transitions. Word has length 215 [2021-11-13 17:49:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:45,661 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1293 transitions. [2021-11-13 17:49:45,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1293 transitions. [2021-11-13 17:49:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 17:49:45,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:45,664 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:45,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-11-13 17:49:45,665 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1716529595, now seen corresponding path program 1 times [2021-11-13 17:49:45,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:45,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057182577] [2021-11-13 17:49:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:45,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-13 17:49:45,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:45,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057182577] [2021-11-13 17:49:45,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057182577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:45,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:45,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:45,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267903482] [2021-11-13 17:49:45,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:45,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:45,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:45,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:45,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:45,759 INFO L87 Difference]: Start difference. First operand 910 states and 1293 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:47,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:48,101 INFO L93 Difference]: Finished difference Result 1815 states and 2583 transitions. [2021-11-13 17:49:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-11-13 17:49:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:48,104 INFO L225 Difference]: With dead ends: 1815 [2021-11-13 17:49:48,104 INFO L226 Difference]: Without dead ends: 928 [2021-11-13 17:49:48,106 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:48,106 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 43 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2219.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2289.15ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:48,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 530 Invalid, 187 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 1 Unknown, 0 Unchecked, 2289.15ms Time] [2021-11-13 17:49:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-11-13 17:49:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 910. [2021-11-13 17:49:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.4202420242024203) internal successors, (1291), 909 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1291 transitions. [2021-11-13 17:49:48,184 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1291 transitions. Word has length 215 [2021-11-13 17:49:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:48,185 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1291 transitions. [2021-11-13 17:49:48,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:48,185 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1291 transitions. [2021-11-13 17:49:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 17:49:48,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:48,189 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:48,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-11-13 17:49:48,189 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1696900249, now seen corresponding path program 1 times [2021-11-13 17:49:48,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:48,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010777964] [2021-11-13 17:49:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:48,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 138 proven. 18 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-13 17:49:48,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:48,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010777964] [2021-11-13 17:49:48,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010777964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:48,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599131720] [2021-11-13 17:49:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:48,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:48,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:48,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:48,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:49:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 17:49:48,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:48,878 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:49:48,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:49:49,185 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:49:49,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:49:49,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-13 17:49:49,612 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:49:49,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:49:49,962 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:49:49,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:49:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 132 proven. 103 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-13 17:49:49,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:50,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:49:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-13 17:49:50,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599131720] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:50,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:49:50,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 11 [2021-11-13 17:49:50,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651468676] [2021-11-13 17:49:50,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:50,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:50,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:50,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:49:50,409 INFO L87 Difference]: Start difference. First operand 910 states and 1291 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:52,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:53,057 INFO L93 Difference]: Finished difference Result 2100 states and 3020 transitions. [2021-11-13 17:49:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:53,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-11-13 17:49:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:53,059 INFO L225 Difference]: With dead ends: 2100 [2021-11-13 17:49:53,059 INFO L226 Difference]: Without dead ends: 1213 [2021-11-13 17:49:53,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:49:53,061 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 109 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2419.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2538.20ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:53,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 305 Invalid, 318 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2538.20ms Time] [2021-11-13 17:49:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-13 17:49:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1006. [2021-11-13 17:49:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.472636815920398) internal successors, (1480), 1005 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1480 transitions. [2021-11-13 17:49:53,131 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1480 transitions. Word has length 215 [2021-11-13 17:49:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:53,132 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1480 transitions. [2021-11-13 17:49:53,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1480 transitions. [2021-11-13 17:49:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-13 17:49:53,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:53,135 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:53,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:53,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-13 17:49:53,351 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1071484682, now seen corresponding path program 1 times [2021-11-13 17:49:53,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:53,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81305559] [2021-11-13 17:49:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:53,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-13 17:49:53,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:53,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81305559] [2021-11-13 17:49:53,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81305559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:53,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:53,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:53,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029909478] [2021-11-13 17:49:53,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:53,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:53,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:53,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:53,476 INFO L87 Difference]: Start difference. First operand 1006 states and 1480 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:55,489 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:55,990 INFO L93 Difference]: Finished difference Result 2149 states and 3174 transitions. [2021-11-13 17:49:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:55,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-13 17:49:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:55,993 INFO L225 Difference]: With dead ends: 2149 [2021-11-13 17:49:55,993 INFO L226 Difference]: Without dead ends: 1166 [2021-11-13 17:49:55,994 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:55,995 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 44 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2341.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2425.53ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:55,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 531 Invalid, 196 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 1 Unknown, 0 Unchecked, 2425.53ms Time] [2021-11-13 17:49:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-11-13 17:49:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1084. [2021-11-13 17:49:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 1.4912280701754386) internal successors, (1615), 1083 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1615 transitions. [2021-11-13 17:49:56,065 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1615 transitions. Word has length 216 [2021-11-13 17:49:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:56,065 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 1615 transitions. [2021-11-13 17:49:56,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1615 transitions. [2021-11-13 17:49:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 17:49:56,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:56,069 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:56,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-11-13 17:49:56,070 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1669386293, now seen corresponding path program 1 times [2021-11-13 17:49:56,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:56,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45128743] [2021-11-13 17:49:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:56,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-13 17:49:56,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:56,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45128743] [2021-11-13 17:49:56,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45128743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:56,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:56,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:56,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925909871] [2021-11-13 17:49:56,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:56,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:56,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:56,182 INFO L87 Difference]: Start difference. First operand 1084 states and 1615 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:58,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:58,659 INFO L93 Difference]: Finished difference Result 2347 states and 3513 transitions. [2021-11-13 17:49:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:58,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-11-13 17:49:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:58,662 INFO L225 Difference]: With dead ends: 2347 [2021-11-13 17:49:58,663 INFO L226 Difference]: Without dead ends: 1286 [2021-11-13 17:49:58,665 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:58,665 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 58 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2307.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2404.01ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:58,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 593 Invalid, 230 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 2404.01ms Time] [2021-11-13 17:49:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-11-13 17:49:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1174. [2021-11-13 17:49:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.5123614663256606) internal successors, (1774), 1173 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1774 transitions. [2021-11-13 17:49:58,727 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1774 transitions. Word has length 219 [2021-11-13 17:49:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:58,727 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1774 transitions. [2021-11-13 17:49:58,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1774 transitions. [2021-11-13 17:49:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-13 17:49:58,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:58,731 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:58,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-11-13 17:49:58,732 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1068551377, now seen corresponding path program 1 times [2021-11-13 17:49:58,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:58,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607207956] [2021-11-13 17:49:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:58,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 244 proven. 68 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 17:49:58,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:58,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607207956] [2021-11-13 17:49:58,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607207956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:58,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858869852] [2021-11-13 17:49:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:58,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:58,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:58,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:58,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:49:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:49:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:59,309 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:49:59,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:49:59,478 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:49:59,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:49:59,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:49:59,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:49:59,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:49:59,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:49:59,869 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:49:59,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:00,124 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 235 proven. 81 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 17:50:00,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:00,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:00,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858869852] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:00,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:00,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:00,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598042575] [2021-11-13 17:50:00,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:00,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:00,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:00,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:00,785 INFO L87 Difference]: Start difference. First operand 1174 states and 1774 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:02,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:03,540 INFO L93 Difference]: Finished difference Result 2538 states and 3806 transitions. [2021-11-13 17:50:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:03,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2021-11-13 17:50:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:03,545 INFO L225 Difference]: With dead ends: 2538 [2021-11-13 17:50:03,545 INFO L226 Difference]: Without dead ends: 1387 [2021-11-13 17:50:03,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 435 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:03,548 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 123 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2477.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2604.90ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:03,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 306 Invalid, 314 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [53 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2604.90ms Time] [2021-11-13 17:50:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-11-13 17:50:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1174. [2021-11-13 17:50:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.5072463768115942) internal successors, (1768), 1173 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1768 transitions. [2021-11-13 17:50:03,654 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1768 transitions. Word has length 221 [2021-11-13 17:50:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:03,654 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1768 transitions. [2021-11-13 17:50:03,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1768 transitions. [2021-11-13 17:50:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-13 17:50:03,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:03,658 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:03,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:03,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:03,874 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1431144961, now seen corresponding path program 1 times [2021-11-13 17:50:03,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:03,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124365987] [2021-11-13 17:50:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:03,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 236 proven. 60 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 17:50:04,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:04,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124365987] [2021-11-13 17:50:04,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124365987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:04,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914076855] [2021-11-13 17:50:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:04,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:04,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:04,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:50:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:04,448 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:04,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:04,612 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:04,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:04,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:04,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:04,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:05,007 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:05,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:05,215 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:05,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 223 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 17:50:05,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:05,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:05,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914076855] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:05,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:05,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:05,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377064142] [2021-11-13 17:50:05,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:05,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:05,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:05,849 INFO L87 Difference]: Start difference. First operand 1174 states and 1768 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:07,863 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:08,461 INFO L93 Difference]: Finished difference Result 2538 states and 3794 transitions. [2021-11-13 17:50:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-13 17:50:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:08,463 INFO L225 Difference]: With dead ends: 2538 [2021-11-13 17:50:08,464 INFO L226 Difference]: Without dead ends: 1387 [2021-11-13 17:50:08,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 437 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:08,466 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 127 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2357.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2469.55ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:08,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 350 Invalid, 313 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [54 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2469.55ms Time] [2021-11-13 17:50:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-11-13 17:50:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1174. [2021-11-13 17:50:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.4995737425404945) internal successors, (1759), 1173 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1759 transitions. [2021-11-13 17:50:08,548 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1759 transitions. Word has length 222 [2021-11-13 17:50:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:08,549 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1759 transitions. [2021-11-13 17:50:08,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1759 transitions. [2021-11-13 17:50:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-13 17:50:08,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:08,553 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:08,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:08,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:08,779 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1174885849, now seen corresponding path program 1 times [2021-11-13 17:50:08,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:08,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727188644] [2021-11-13 17:50:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:08,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 246 proven. 70 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-13 17:50:08,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:08,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727188644] [2021-11-13 17:50:08,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727188644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:08,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151775567] [2021-11-13 17:50:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:08,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:08,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:08,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:50:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:09,321 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:09,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:09,469 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:09,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:09,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:09,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:09,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:09,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:09,803 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:09,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:10,035 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:10,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 238 proven. 80 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-13 17:50:10,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:10,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:10,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151775567] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:10,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:10,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:10,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028583270] [2021-11-13 17:50:10,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:10,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:10,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:10,683 INFO L87 Difference]: Start difference. First operand 1174 states and 1759 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:12,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:13,251 INFO L93 Difference]: Finished difference Result 2538 states and 3776 transitions. [2021-11-13 17:50:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:13,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-13 17:50:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:13,253 INFO L225 Difference]: With dead ends: 2538 [2021-11-13 17:50:13,253 INFO L226 Difference]: Without dead ends: 1387 [2021-11-13 17:50:13,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 437 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:13,255 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 122 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2370.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2467.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:13,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 316 Invalid, 316 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [58 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2467.11ms Time] [2021-11-13 17:50:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-11-13 17:50:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1168. [2021-11-13 17:50:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.497000856898029) internal successors, (1747), 1167 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1747 transitions. [2021-11-13 17:50:13,324 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1747 transitions. Word has length 222 [2021-11-13 17:50:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:13,324 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1747 transitions. [2021-11-13 17:50:13,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1747 transitions. [2021-11-13 17:50:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-13 17:50:13,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:13,327 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:13,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:13,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:13,528 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash 122946730, now seen corresponding path program 1 times [2021-11-13 17:50:13,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:13,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222235783] [2021-11-13 17:50:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:13,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 248 proven. 72 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-13 17:50:13,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:13,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222235783] [2021-11-13 17:50:13,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222235783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:13,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448712545] [2021-11-13 17:50:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:13,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:13,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:13,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:13,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:50:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:14,043 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:14,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:14,197 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:14,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:14,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:14,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:14,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:14,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:14,569 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:14,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:14,825 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:14,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 241 proven. 79 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-13 17:50:14,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:15,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:15,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448712545] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:15,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:15,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:15,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327027135] [2021-11-13 17:50:15,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:15,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:15,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:15,450 INFO L87 Difference]: Start difference. First operand 1168 states and 1747 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:17,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:18,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:18,037 INFO L93 Difference]: Finished difference Result 2646 states and 3968 transitions. [2021-11-13 17:50:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-13 17:50:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:18,039 INFO L225 Difference]: With dead ends: 2646 [2021-11-13 17:50:18,039 INFO L226 Difference]: Without dead ends: 1501 [2021-11-13 17:50:18,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 437 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:18,041 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 119 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2355.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2473.46ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:18,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 318 Invalid, 299 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [46 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2473.46ms Time] [2021-11-13 17:50:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-11-13 17:50:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1264. [2021-11-13 17:50:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 1.5091053048297705) internal successors, (1906), 1263 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1906 transitions. [2021-11-13 17:50:18,130 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1906 transitions. Word has length 222 [2021-11-13 17:50:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:18,130 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1906 transitions. [2021-11-13 17:50:18,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1906 transitions. [2021-11-13 17:50:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 17:50:18,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:18,135 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:18,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:18,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-11-13 17:50:18,351 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash 275411769, now seen corresponding path program 1 times [2021-11-13 17:50:18,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:18,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305683588] [2021-11-13 17:50:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:18,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 238 proven. 62 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-13 17:50:18,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:18,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305683588] [2021-11-13 17:50:18,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305683588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:18,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715026910] [2021-11-13 17:50:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:18,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:18,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:18,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:18,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:50:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:18,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:18,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:18,886 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:18,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:19,027 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:19,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:19,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:19,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:19,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:19,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:19,361 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:19,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:19,573 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:19,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:50:19,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:19,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:20,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715026910] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:20,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:20,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:20,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108474178] [2021-11-13 17:50:20,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:20,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:20,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:20,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:20,182 INFO L87 Difference]: Start difference. First operand 1264 states and 1906 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:22,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:22,752 INFO L93 Difference]: Finished difference Result 2718 states and 4070 transitions. [2021-11-13 17:50:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:22,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-11-13 17:50:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:22,754 INFO L225 Difference]: With dead ends: 2718 [2021-11-13 17:50:22,754 INFO L226 Difference]: Without dead ends: 1477 [2021-11-13 17:50:22,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 439 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:22,755 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 125 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2356.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2452.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:22,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 304 Invalid, 317 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2452.75ms Time] [2021-11-13 17:50:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-11-13 17:50:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1264. [2021-11-13 17:50:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 1.4996041171813144) internal successors, (1894), 1263 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1894 transitions. [2021-11-13 17:50:22,817 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1894 transitions. Word has length 223 [2021-11-13 17:50:22,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:22,817 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1894 transitions. [2021-11-13 17:50:22,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1894 transitions. [2021-11-13 17:50:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-13 17:50:22,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:22,820 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:22,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:23,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-11-13 17:50:23,020 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash 570016325, now seen corresponding path program 1 times [2021-11-13 17:50:23,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:23,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680239406] [2021-11-13 17:50:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:23,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 240 proven. 64 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-13 17:50:23,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:23,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680239406] [2021-11-13 17:50:23,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680239406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:23,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315801412] [2021-11-13 17:50:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:23,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:23,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:23,199 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:23,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:50:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:23,538 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:23,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:23,671 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:23,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:23,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:23,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:24,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:24,019 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:24,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:24,223 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:24,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 229 proven. 83 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 17:50:24,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:24,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:24,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315801412] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:24,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:24,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:24,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194742418] [2021-11-13 17:50:24,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:24,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:24,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:24,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:24,824 INFO L87 Difference]: Start difference. First operand 1264 states and 1894 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:26,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:27,402 INFO L93 Difference]: Finished difference Result 2847 states and 4268 transitions. [2021-11-13 17:50:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:27,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-13 17:50:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:27,409 INFO L225 Difference]: With dead ends: 2847 [2021-11-13 17:50:27,410 INFO L226 Difference]: Without dead ends: 1606 [2021-11-13 17:50:27,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 441 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:27,412 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 123 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2365.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2460.72ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:27,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 304 Invalid, 316 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [57 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2460.72ms Time] [2021-11-13 17:50:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-13 17:50:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1348. [2021-11-13 17:50:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 1.504083147735709) internal successors, (2026), 1347 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2026 transitions. [2021-11-13 17:50:27,516 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2026 transitions. Word has length 224 [2021-11-13 17:50:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:27,516 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 2026 transitions. [2021-11-13 17:50:27,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2026 transitions. [2021-11-13 17:50:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-13 17:50:27,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:27,520 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:27,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-13 17:50:27,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:27,721 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1819733795, now seen corresponding path program 1 times [2021-11-13 17:50:27,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:27,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154283638] [2021-11-13 17:50:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:27,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 242 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:50:27,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:27,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154283638] [2021-11-13 17:50:27,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154283638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:27,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320299510] [2021-11-13 17:50:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:27,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:27,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:27,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:50:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:28,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:28,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:28,277 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:28,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:28,426 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:28,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:28,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:28,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:28,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:28,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:28,741 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:28,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:28,970 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 232 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 17:50:29,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:29,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320299510] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:29,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:29,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:29,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967823815] [2021-11-13 17:50:29,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:29,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:29,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:29,493 INFO L87 Difference]: Start difference. First operand 1348 states and 2026 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:31,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:32,064 INFO L93 Difference]: Finished difference Result 2886 states and 4310 transitions. [2021-11-13 17:50:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:32,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-11-13 17:50:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:32,067 INFO L225 Difference]: With dead ends: 2886 [2021-11-13 17:50:32,067 INFO L226 Difference]: Without dead ends: 1561 [2021-11-13 17:50:32,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 443 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:32,082 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 122 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2355.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2452.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:32,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 310 Invalid, 316 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [58 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2452.61ms Time] [2021-11-13 17:50:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2021-11-13 17:50:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1336. [2021-11-13 17:50:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 1.499625468164794) internal successors, (2002), 1335 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2002 transitions. [2021-11-13 17:50:32,143 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2002 transitions. Word has length 225 [2021-11-13 17:50:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:32,144 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2002 transitions. [2021-11-13 17:50:32,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2002 transitions. [2021-11-13 17:50:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-13 17:50:32,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:32,147 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:32,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:32,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:32,349 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1201117865, now seen corresponding path program 1 times [2021-11-13 17:50:32,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:32,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757987480] [2021-11-13 17:50:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:32,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-13 17:50:32,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:32,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757987480] [2021-11-13 17:50:32,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757987480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:32,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:32,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:50:32,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405087309] [2021-11-13 17:50:32,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:32,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:32,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:50:32,472 INFO L87 Difference]: Start difference. First operand 1336 states and 2002 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:34,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:34,840 INFO L93 Difference]: Finished difference Result 2761 states and 4142 transitions. [2021-11-13 17:50:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-11-13 17:50:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:34,843 INFO L225 Difference]: With dead ends: 2761 [2021-11-13 17:50:34,843 INFO L226 Difference]: Without dead ends: 1448 [2021-11-13 17:50:34,845 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:50:34,845 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 28 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2218.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2290.14ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:34,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 549 Invalid, 169 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2290.14ms Time] [2021-11-13 17:50:34,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-11-13 17:50:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1399. [2021-11-13 17:50:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 1.5071530758226037) internal successors, (2107), 1398 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2107 transitions. [2021-11-13 17:50:34,924 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2107 transitions. Word has length 225 [2021-11-13 17:50:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:34,924 INFO L470 AbstractCegarLoop]: Abstraction has 1399 states and 2107 transitions. [2021-11-13 17:50:34,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2107 transitions. [2021-11-13 17:50:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-13 17:50:34,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:34,927 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:34,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-11-13 17:50:34,927 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2097336035, now seen corresponding path program 1 times [2021-11-13 17:50:34,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:34,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674012807] [2021-11-13 17:50:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:34,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 254 proven. 78 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 17:50:35,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:35,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674012807] [2021-11-13 17:50:35,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674012807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:35,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650697138] [2021-11-13 17:50:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:35,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:35,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:35,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:35,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:50:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:35,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:35,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:35,380 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:35,505 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:35,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:35,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:35,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:35,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:35,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:35,798 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:35,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:36,012 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:36,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 250 proven. 76 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:50:36,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:36,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:36,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650697138] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:36,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:36,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:36,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480677098] [2021-11-13 17:50:36,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:36,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:36,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:36,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:36,556 INFO L87 Difference]: Start difference. First operand 1399 states and 2107 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:38,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:39,185 INFO L93 Difference]: Finished difference Result 3117 states and 4688 transitions. [2021-11-13 17:50:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2021-11-13 17:50:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:39,189 INFO L225 Difference]: With dead ends: 3117 [2021-11-13 17:50:39,189 INFO L226 Difference]: Without dead ends: 1741 [2021-11-13 17:50:39,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 445 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:39,192 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 115 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2369.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2470.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:39,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 330 Invalid, 314 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [55 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2470.09ms Time] [2021-11-13 17:50:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2021-11-13 17:50:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1504. [2021-11-13 17:50:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 1.511643379906853) internal successors, (2272), 1503 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2272 transitions. [2021-11-13 17:50:39,273 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2272 transitions. Word has length 226 [2021-11-13 17:50:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:39,273 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 2272 transitions. [2021-11-13 17:50:39,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2272 transitions. [2021-11-13 17:50:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-13 17:50:39,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:39,276 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:39,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:39,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:39,479 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:39,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:39,479 INFO L85 PathProgramCache]: Analyzing trace with hash 682199459, now seen corresponding path program 1 times [2021-11-13 17:50:39,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:39,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973298228] [2021-11-13 17:50:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:39,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-13 17:50:39,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:39,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973298228] [2021-11-13 17:50:39,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973298228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:39,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:39,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:50:39,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613336330] [2021-11-13 17:50:39,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:39,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:39,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:50:39,571 INFO L87 Difference]: Start difference. First operand 1504 states and 2272 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:41,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:42,027 INFO L93 Difference]: Finished difference Result 3079 states and 4632 transitions. [2021-11-13 17:50:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:42,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2021-11-13 17:50:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:42,031 INFO L225 Difference]: With dead ends: 3079 [2021-11-13 17:50:42,031 INFO L226 Difference]: Without dead ends: 1598 [2021-11-13 17:50:42,035 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:50:42,035 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 49 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2265.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2345.77ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:42,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 586 Invalid, 217 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [8 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 2345.77ms Time] [2021-11-13 17:50:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-11-13 17:50:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1504. [2021-11-13 17:50:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 1.509647371922821) internal successors, (2269), 1503 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2269 transitions. [2021-11-13 17:50:42,107 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2269 transitions. Word has length 226 [2021-11-13 17:50:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:42,107 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 2269 transitions. [2021-11-13 17:50:42,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2269 transitions. [2021-11-13 17:50:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-13 17:50:42,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:42,110 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:42,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-11-13 17:50:42,110 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash -528341472, now seen corresponding path program 1 times [2021-11-13 17:50:42,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:42,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967271238] [2021-11-13 17:50:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:42,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 256 proven. 80 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 17:50:42,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:42,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967271238] [2021-11-13 17:50:42,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967271238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:42,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452896185] [2021-11-13 17:50:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:42,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:42,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:42,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:42,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 17:50:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:42,589 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:42,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:42,748 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:42,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:42,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:42,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:43,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:43,119 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:43,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:43,403 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:43,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 75 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-13 17:50:43,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:43,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:43,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452896185] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:43,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:43,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:43,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327436889] [2021-11-13 17:50:43,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:43,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:43,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:43,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:43,933 INFO L87 Difference]: Start difference. First operand 1504 states and 2269 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:45,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:46,539 INFO L93 Difference]: Finished difference Result 3198 states and 4796 transitions. [2021-11-13 17:50:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:46,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2021-11-13 17:50:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:46,541 INFO L225 Difference]: With dead ends: 3198 [2021-11-13 17:50:46,541 INFO L226 Difference]: Without dead ends: 1717 [2021-11-13 17:50:46,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 447 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:46,543 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 114 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2370.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2472.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:46,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 310 Invalid, 316 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [58 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2472.08ms Time] [2021-11-13 17:50:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-11-13 17:50:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1504. [2021-11-13 17:50:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 1.5056553559547572) internal successors, (2263), 1503 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2263 transitions. [2021-11-13 17:50:46,632 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2263 transitions. Word has length 227 [2021-11-13 17:50:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:46,633 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 2263 transitions. [2021-11-13 17:50:46,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2263 transitions. [2021-11-13 17:50:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-13 17:50:46,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:46,635 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:46,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:46,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-13 17:50:46,839 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:46,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:46,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1957532696, now seen corresponding path program 1 times [2021-11-13 17:50:46,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:46,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860832988] [2021-11-13 17:50:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:46,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 258 proven. 82 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 17:50:46,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:46,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860832988] [2021-11-13 17:50:46,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860832988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:46,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475752289] [2021-11-13 17:50:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:46,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:46,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:46,991 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:47,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 17:50:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:47,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:47,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:47,310 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:47,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:47,441 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:47,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:47,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:47,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:47,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:47,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:47,731 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:47,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:47,994 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:47,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 256 proven. 74 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-13 17:50:48,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:48,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:48,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475752289] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:48,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:48,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:48,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708841935] [2021-11-13 17:50:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:48,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:48,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:48,504 INFO L87 Difference]: Start difference. First operand 1504 states and 2263 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:50,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:51,137 INFO L93 Difference]: Finished difference Result 3327 states and 4994 transitions. [2021-11-13 17:50:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-11-13 17:50:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:51,140 INFO L225 Difference]: With dead ends: 3327 [2021-11-13 17:50:51,140 INFO L226 Difference]: Without dead ends: 1846 [2021-11-13 17:50:51,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 449 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:51,142 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 112 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2379.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2485.85ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:51,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 310 Invalid, 315 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [56 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2485.85ms Time] [2021-11-13 17:50:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-11-13 17:50:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1615. [2021-11-13 17:50:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 1.5080545229244113) internal successors, (2434), 1614 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2434 transitions. [2021-11-13 17:50:51,242 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2434 transitions. Word has length 228 [2021-11-13 17:50:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:51,242 INFO L470 AbstractCegarLoop]: Abstraction has 1615 states and 2434 transitions. [2021-11-13 17:50:51,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2434 transitions. [2021-11-13 17:50:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-13 17:50:51,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:51,245 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:51,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:51,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-13 17:50:51,446 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1328383867, now seen corresponding path program 1 times [2021-11-13 17:50:51,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:51,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038160685] [2021-11-13 17:50:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:51,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 260 proven. 84 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 17:50:51,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:51,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038160685] [2021-11-13 17:50:51,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038160685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:51,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531332668] [2021-11-13 17:50:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:51,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:51,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:51,603 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:51,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 17:50:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:50:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:51,908 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:51,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:52,052 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:52,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:52,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:52,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-13 17:50:52,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:50:52,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:50:52,330 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:52,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-13 17:50:52,583 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:50:52,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:50:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 259 proven. 73 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 17:50:52,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:52,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 17:50:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 17:50:53,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531332668] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:53,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:53,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 10] total 11 [2021-11-13 17:50:53,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602349852] [2021-11-13 17:50:53,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:53,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:53,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:53,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:53,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:53,103 INFO L87 Difference]: Start difference. First operand 1615 states and 2434 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:55,112 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:55,690 INFO L93 Difference]: Finished difference Result 3420 states and 5126 transitions. [2021-11-13 17:50:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:55,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-13 17:50:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:55,692 INFO L225 Difference]: With dead ends: 3420 [2021-11-13 17:50:55,693 INFO L226 Difference]: Without dead ends: 1828 [2021-11-13 17:50:55,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 451 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:50:55,694 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 111 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2351.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2445.34ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:55,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 310 Invalid, 316 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [58 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2445.34ms Time] [2021-11-13 17:50:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-11-13 17:50:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1615. [2021-11-13 17:50:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 1.5043370508054523) internal successors, (2428), 1614 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2428 transitions. [2021-11-13 17:50:55,796 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2428 transitions. Word has length 229 [2021-11-13 17:50:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:55,796 INFO L470 AbstractCegarLoop]: Abstraction has 1615 states and 2428 transitions. [2021-11-13 17:50:55,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2428 transitions. [2021-11-13 17:50:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-13 17:50:55,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:55,798 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:55,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:55,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-13 17:50:55,999 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash -675816360, now seen corresponding path program 1 times [2021-11-13 17:50:56,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:56,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749849546] [2021-11-13 17:50:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:56,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-11-13 17:50:56,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:56,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749849546] [2021-11-13 17:50:56,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749849546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:56,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:56,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:50:56,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457708433] [2021-11-13 17:50:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:56,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:56,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:50:56,119 INFO L87 Difference]: Start difference. First operand 1615 states and 2428 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:58,132 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:50:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:58,559 INFO L93 Difference]: Finished difference Result 3388 states and 5091 transitions. [2021-11-13 17:50:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:50:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-13 17:50:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:58,562 INFO L225 Difference]: With dead ends: 3388 [2021-11-13 17:50:58,562 INFO L226 Difference]: Without dead ends: 1796 [2021-11-13 17:50:58,563 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:50:58,564 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 44 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2260.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2335.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:58,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 564 Invalid, 214 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [12 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2335.42ms Time] [2021-11-13 17:50:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-11-13 17:50:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1711. [2021-11-13 17:50:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 1.5093567251461988) internal successors, (2581), 1710 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2581 transitions. [2021-11-13 17:50:58,667 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2581 transitions. Word has length 229 [2021-11-13 17:50:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:58,667 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2581 transitions. [2021-11-13 17:50:58,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2581 transitions. [2021-11-13 17:50:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-13 17:50:58,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:58,670 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:58,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-11-13 17:50:58,670 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:58,671 INFO L85 PathProgramCache]: Analyzing trace with hash -953478740, now seen corresponding path program 1 times [2021-11-13 17:50:58,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:58,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946648868] [2021-11-13 17:50:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:58,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-11-13 17:50:58,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:58,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946648868] [2021-11-13 17:50:58,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946648868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:58,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:58,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:50:58,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164845113] [2021-11-13 17:50:58,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:58,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:50:58,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:58,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:50:58,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:50:58,778 INFO L87 Difference]: Start difference. First operand 1711 states and 2581 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:00,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:01,182 INFO L93 Difference]: Finished difference Result 3483 states and 5243 transitions. [2021-11-13 17:51:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2021-11-13 17:51:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:01,185 INFO L225 Difference]: With dead ends: 3483 [2021-11-13 17:51:01,185 INFO L226 Difference]: Without dead ends: 1789 [2021-11-13 17:51:01,186 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:51:01,187 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 22 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2232.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2301.74ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:01,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 529 Invalid, 200 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 2301.74ms Time] [2021-11-13 17:51:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-11-13 17:51:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1762. [2021-11-13 17:51:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.5031232254400908) internal successors, (2647), 1761 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2647 transitions. [2021-11-13 17:51:01,300 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2647 transitions. Word has length 230 [2021-11-13 17:51:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:01,301 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 2647 transitions. [2021-11-13 17:51:01,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2647 transitions. [2021-11-13 17:51:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-13 17:51:01,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:01,305 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:01,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-11-13 17:51:01,305 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:01,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash 506818684, now seen corresponding path program 1 times [2021-11-13 17:51:01,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:01,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478021865] [2021-11-13 17:51:01,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:01,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-13 17:51:01,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:01,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478021865] [2021-11-13 17:51:01,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478021865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:01,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:01,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:51:01,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108139380] [2021-11-13 17:51:01,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:01,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:51:01,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:51:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:51:01,430 INFO L87 Difference]: Start difference. First operand 1762 states and 2647 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:03,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:03,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:03,851 INFO L93 Difference]: Finished difference Result 3583 states and 5370 transitions. [2021-11-13 17:51:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-11-13 17:51:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:03,854 INFO L225 Difference]: With dead ends: 3583 [2021-11-13 17:51:03,854 INFO L226 Difference]: Without dead ends: 1844 [2021-11-13 17:51:03,855 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:51:03,856 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 57 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2237.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2314.50ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:03,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 525 Invalid, 192 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2314.50ms Time] [2021-11-13 17:51:03,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-13 17:51:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1762. [2021-11-13 17:51:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.501419647927314) internal successors, (2644), 1761 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2644 transitions. [2021-11-13 17:51:04,002 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2644 transitions. Word has length 231 [2021-11-13 17:51:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:04,003 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 2644 transitions. [2021-11-13 17:51:04,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2644 transitions. [2021-11-13 17:51:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-13 17:51:04,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:04,005 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:04,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-11-13 17:51:04,005 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash -286349616, now seen corresponding path program 1 times [2021-11-13 17:51:04,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:04,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003939292] [2021-11-13 17:51:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:04,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-13 17:51:04,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:04,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003939292] [2021-11-13 17:51:04,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003939292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:04,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:04,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:51:04,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327186877] [2021-11-13 17:51:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:04,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:51:04,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:04,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:51:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:51:04,113 INFO L87 Difference]: Start difference. First operand 1762 states and 2644 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:06,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:06,540 INFO L93 Difference]: Finished difference Result 3583 states and 5364 transitions. [2021-11-13 17:51:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-11-13 17:51:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:06,542 INFO L225 Difference]: With dead ends: 3583 [2021-11-13 17:51:06,543 INFO L226 Difference]: Without dead ends: 1844 [2021-11-13 17:51:06,544 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:51:06,544 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 55 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2247.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2322.12ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:06,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 525 Invalid, 192 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2322.12ms Time] [2021-11-13 17:51:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-13 17:51:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1762. [2021-11-13 17:51:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.4997160704145371) internal successors, (2641), 1761 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2641 transitions. [2021-11-13 17:51:06,644 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2641 transitions. Word has length 232 [2021-11-13 17:51:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:06,645 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 2641 transitions. [2021-11-13 17:51:06,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2641 transitions. [2021-11-13 17:51:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-13 17:51:06,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:06,647 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:06,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-11-13 17:51:06,647 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2028744767, now seen corresponding path program 1 times [2021-11-13 17:51:06,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:06,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155541963] [2021-11-13 17:51:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:06,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-13 17:51:06,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:06,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155541963] [2021-11-13 17:51:06,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155541963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:06,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:06,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:51:06,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841640710] [2021-11-13 17:51:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:06,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:51:06,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:51:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:51:06,737 INFO L87 Difference]: Start difference. First operand 1762 states and 2641 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:08,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:09,156 INFO L93 Difference]: Finished difference Result 3583 states and 5358 transitions. [2021-11-13 17:51:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-11-13 17:51:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:09,159 INFO L225 Difference]: With dead ends: 3583 [2021-11-13 17:51:09,160 INFO L226 Difference]: Without dead ends: 1844 [2021-11-13 17:51:09,161 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:51:09,161 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 53 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2231.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2310.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:09,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 525 Invalid, 192 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2310.09ms Time] [2021-11-13 17:51:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-13 17:51:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1762. [2021-11-13 17:51:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.4980124929017604) internal successors, (2638), 1761 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2638 transitions. [2021-11-13 17:51:09,263 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2638 transitions. Word has length 233 [2021-11-13 17:51:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:09,264 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 2638 transitions. [2021-11-13 17:51:09,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2638 transitions. [2021-11-13 17:51:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-13 17:51:09,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:09,266 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:09,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-11-13 17:51:09,266 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:09,267 INFO L85 PathProgramCache]: Analyzing trace with hash 198969349, now seen corresponding path program 1 times [2021-11-13 17:51:09,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:09,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719694252] [2021-11-13 17:51:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:09,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 17:51:09,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:09,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719694252] [2021-11-13 17:51:09,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719694252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:09,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:09,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:51:09,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120186642] [2021-11-13 17:51:09,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:09,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:51:09,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:51:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:51:09,595 INFO L87 Difference]: Start difference. First operand 1762 states and 2638 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:11,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:13,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:14,572 INFO L93 Difference]: Finished difference Result 3937 states and 5868 transitions. [2021-11-13 17:51:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:51:14,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-13 17:51:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:14,576 INFO L225 Difference]: With dead ends: 3937 [2021-11-13 17:51:14,577 INFO L226 Difference]: Without dead ends: 2198 [2021-11-13 17:51:14,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:51:14,578 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 149 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4527.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4696.37ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:14,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 752 Invalid, 427 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [24 Valid, 401 Invalid, 2 Unknown, 0 Unchecked, 4696.37ms Time] [2021-11-13 17:51:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2021-11-13 17:51:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 1897. [2021-11-13 17:51:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 1.5084388185654007) internal successors, (2860), 1896 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2860 transitions. [2021-11-13 17:51:14,721 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2860 transitions. Word has length 234 [2021-11-13 17:51:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:14,721 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 2860 transitions. [2021-11-13 17:51:14,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2860 transitions. [2021-11-13 17:51:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-13 17:51:14,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:14,725 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:14,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-11-13 17:51:14,725 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1942891129, now seen corresponding path program 1 times [2021-11-13 17:51:14,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:14,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947728762] [2021-11-13 17:51:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:14,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 17:51:15,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:15,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947728762] [2021-11-13 17:51:15,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947728762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:15,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:15,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:51:15,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79912624] [2021-11-13 17:51:15,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:15,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:51:15,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:51:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:51:15,016 INFO L87 Difference]: Start difference. First operand 1897 states and 2860 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:17,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:19,062 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:21,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:23,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:24,572 INFO L93 Difference]: Finished difference Result 5303 states and 7944 transitions. [2021-11-13 17:51:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:51:24,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-13 17:51:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:24,577 INFO L225 Difference]: With dead ends: 5303 [2021-11-13 17:51:24,577 INFO L226 Difference]: Without dead ends: 3429 [2021-11-13 17:51:24,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:51:24,579 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 212 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 41 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9056.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.80ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9332.46ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:24,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1276 Invalid, 1042 Unknown, 0 Unchecked, 5.80ms Time], IncrementalHoareTripleChecker [41 Valid, 997 Invalid, 4 Unknown, 0 Unchecked, 9332.46ms Time] [2021-11-13 17:51:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-11-13 17:51:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 3169. [2021-11-13 17:51:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 1.5088383838383839) internal successors, (4780), 3168 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 4780 transitions. [2021-11-13 17:51:24,753 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 4780 transitions. Word has length 234 [2021-11-13 17:51:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:24,753 INFO L470 AbstractCegarLoop]: Abstraction has 3169 states and 4780 transitions. [2021-11-13 17:51:24,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 4780 transitions. [2021-11-13 17:51:24,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-13 17:51:24,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:24,756 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:24,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-11-13 17:51:24,756 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash -979294409, now seen corresponding path program 1 times [2021-11-13 17:51:24,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:24,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463042550] [2021-11-13 17:51:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:24,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-13 17:51:24,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:24,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463042550] [2021-11-13 17:51:24,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463042550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:24,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:24,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:51:24,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103002605] [2021-11-13 17:51:24,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:24,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:51:24,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:24,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:51:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:51:24,850 INFO L87 Difference]: Start difference. First operand 3169 states and 4780 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:26,857 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:27,227 INFO L93 Difference]: Finished difference Result 6407 states and 9649 transitions. [2021-11-13 17:51:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:27,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-13 17:51:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:27,230 INFO L225 Difference]: With dead ends: 6407 [2021-11-13 17:51:27,230 INFO L226 Difference]: Without dead ends: 3261 [2021-11-13 17:51:27,232 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:51:27,232 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 44 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2176.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2233.66ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:27,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 537 Invalid, 176 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 2233.66ms Time] [2021-11-13 17:51:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-11-13 17:51:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 3169. [2021-11-13 17:51:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 1.5069444444444444) internal successors, (4774), 3168 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 4774 transitions. [2021-11-13 17:51:27,365 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 4774 transitions. Word has length 234 [2021-11-13 17:51:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:27,365 INFO L470 AbstractCegarLoop]: Abstraction has 3169 states and 4774 transitions. [2021-11-13 17:51:27,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 4774 transitions. [2021-11-13 17:51:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-13 17:51:27,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:27,367 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:27,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-11-13 17:51:27,368 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash 999970559, now seen corresponding path program 1 times [2021-11-13 17:51:27,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:27,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840574258] [2021-11-13 17:51:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:27,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 17:51:27,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:27,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840574258] [2021-11-13 17:51:27,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840574258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:27,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:27,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:51:27,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552176184] [2021-11-13 17:51:27,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:27,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:51:27,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:51:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:51:27,510 INFO L87 Difference]: Start difference. First operand 3169 states and 4774 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:29,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:30,239 INFO L93 Difference]: Finished difference Result 6689 states and 9998 transitions. [2021-11-13 17:51:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:51:30,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-11-13 17:51:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:30,243 INFO L225 Difference]: With dead ends: 6689 [2021-11-13 17:51:30,244 INFO L226 Difference]: Without dead ends: 3543 [2021-11-13 17:51:30,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:51:30,246 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 134 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2355.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2448.45ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:30,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 730 Invalid, 415 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [24 Valid, 390 Invalid, 1 Unknown, 0 Unchecked, 2448.45ms Time] [2021-11-13 17:51:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2021-11-13 17:51:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3175. [2021-11-13 17:51:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 1.5040957781978577) internal successors, (4774), 3174 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 4774 transitions. [2021-11-13 17:51:30,370 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 4774 transitions. Word has length 235 [2021-11-13 17:51:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:30,371 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 4774 transitions. [2021-11-13 17:51:30,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 4774 transitions. [2021-11-13 17:51:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-13 17:51:30,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:30,373 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:30,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-11-13 17:51:30,373 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash -973194819, now seen corresponding path program 1 times [2021-11-13 17:51:30,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:30,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122677303] [2021-11-13 17:51:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:30,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 17:51:30,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:30,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122677303] [2021-11-13 17:51:30,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122677303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:30,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:30,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:51:30,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872379495] [2021-11-13 17:51:30,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:30,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:51:30,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:51:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:51:30,546 INFO L87 Difference]: Start difference. First operand 3175 states and 4774 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:32,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:34,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:36,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:37,908 INFO L93 Difference]: Finished difference Result 7793 states and 11649 transitions. [2021-11-13 17:51:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:51:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-11-13 17:51:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:37,912 INFO L225 Difference]: With dead ends: 7793 [2021-11-13 17:51:37,912 INFO L226 Difference]: Without dead ends: 4641 [2021-11-13 17:51:37,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:51:37,914 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 373 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 83 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6845.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.23ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7071.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:37,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1128 Invalid, 910 Unknown, 0 Unchecked, 5.23ms Time], IncrementalHoareTripleChecker [83 Valid, 824 Invalid, 3 Unknown, 0 Unchecked, 7071.51ms Time] [2021-11-13 17:51:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-11-13 17:51:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3178. [2021-11-13 17:51:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 1.504564054139125) internal successors, (4780), 3177 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4780 transitions. [2021-11-13 17:51:38,084 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4780 transitions. Word has length 235 [2021-11-13 17:51:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:38,084 INFO L470 AbstractCegarLoop]: Abstraction has 3178 states and 4780 transitions. [2021-11-13 17:51:38,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4780 transitions. [2021-11-13 17:51:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-13 17:51:38,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:38,087 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:38,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-11-13 17:51:38,087 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash 888137692, now seen corresponding path program 1 times [2021-11-13 17:51:38,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:38,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925825029] [2021-11-13 17:51:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:38,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-13 17:51:38,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:38,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925825029] [2021-11-13 17:51:38,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925825029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:38,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:38,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:51:38,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091425776] [2021-11-13 17:51:38,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:38,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:51:38,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:51:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:51:38,178 INFO L87 Difference]: Start difference. First operand 3178 states and 4780 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:40,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:40,600 INFO L93 Difference]: Finished difference Result 6425 states and 9649 transitions. [2021-11-13 17:51:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-11-13 17:51:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:40,603 INFO L225 Difference]: With dead ends: 6425 [2021-11-13 17:51:40,603 INFO L226 Difference]: Without dead ends: 3270 [2021-11-13 17:51:40,604 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:51:40,604 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 42 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2188.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2244.98ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:40,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 537 Invalid, 176 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 2244.98ms Time] [2021-11-13 17:51:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2021-11-13 17:51:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 3178. [2021-11-13 17:51:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 1.5026754800125905) internal successors, (4774), 3177 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4774 transitions. [2021-11-13 17:51:40,721 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4774 transitions. Word has length 244 [2021-11-13 17:51:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:40,721 INFO L470 AbstractCegarLoop]: Abstraction has 3178 states and 4774 transitions. [2021-11-13 17:51:40,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4774 transitions. [2021-11-13 17:51:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-13 17:51:40,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:40,724 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:40,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-11-13 17:51:40,724 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash 469828121, now seen corresponding path program 1 times [2021-11-13 17:51:40,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:40,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435417918] [2021-11-13 17:51:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:40,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-11-13 17:51:40,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:40,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435417918] [2021-11-13 17:51:40,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435417918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:40,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:40,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:51:40,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965052384] [2021-11-13 17:51:40,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:40,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:51:40,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:40,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:51:40,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:51:40,840 INFO L87 Difference]: Start difference. First operand 3178 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:42,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:43,272 INFO L93 Difference]: Finished difference Result 6473 states and 9703 transitions. [2021-11-13 17:51:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-11-13 17:51:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:43,276 INFO L225 Difference]: With dead ends: 6473 [2021-11-13 17:51:43,276 INFO L226 Difference]: Without dead ends: 3318 [2021-11-13 17:51:43,277 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:51:43,278 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 52 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2209.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2278.07ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:43,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 556 Invalid, 213 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [8 Valid, 204 Invalid, 1 Unknown, 0 Unchecked, 2278.07ms Time] [2021-11-13 17:51:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-11-13 17:51:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 3178. [2021-11-13 17:51:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 1.5007869058860561) internal successors, (4768), 3177 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4768 transitions. [2021-11-13 17:51:43,427 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4768 transitions. Word has length 244 [2021-11-13 17:51:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:43,427 INFO L470 AbstractCegarLoop]: Abstraction has 3178 states and 4768 transitions. [2021-11-13 17:51:43,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4768 transitions. [2021-11-13 17:51:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-13 17:51:43,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:43,431 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:43,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-11-13 17:51:43,431 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1616589572, now seen corresponding path program 1 times [2021-11-13 17:51:43,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:43,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480350733] [2021-11-13 17:51:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:43,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-13 17:51:43,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:43,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480350733] [2021-11-13 17:51:43,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480350733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:43,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:43,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:51:43,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265612353] [2021-11-13 17:51:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:43,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:51:43,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:51:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:51:43,525 INFO L87 Difference]: Start difference. First operand 3178 states and 4768 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:45,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:45,948 INFO L93 Difference]: Finished difference Result 6419 states and 9619 transitions. [2021-11-13 17:51:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-11-13 17:51:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:45,953 INFO L225 Difference]: With dead ends: 6419 [2021-11-13 17:51:45,953 INFO L226 Difference]: Without dead ends: 3264 [2021-11-13 17:51:45,956 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:51:45,956 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 40 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2156.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2211.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:45,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 541 Invalid, 171 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [3 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2211.51ms Time] [2021-11-13 17:51:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2021-11-13 17:51:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 3178. [2021-11-13 17:51:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 1.4988983317595215) internal successors, (4762), 3177 states have internal predecessors, (4762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4762 transitions. [2021-11-13 17:51:46,108 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4762 transitions. Word has length 245 [2021-11-13 17:51:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:46,108 INFO L470 AbstractCegarLoop]: Abstraction has 3178 states and 4762 transitions. [2021-11-13 17:51:46,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4762 transitions. [2021-11-13 17:51:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-13 17:51:46,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:46,111 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:46,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-11-13 17:51:46,111 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash 761819141, now seen corresponding path program 1 times [2021-11-13 17:51:46,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:46,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266836814] [2021-11-13 17:51:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:46,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 328 proven. 49 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-13 17:51:46,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:46,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266836814] [2021-11-13 17:51:46,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266836814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:51:46,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472700912] [2021-11-13 17:51:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:46,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:51:46,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:51:46,231 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:51:46,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 17:51:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:46,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 17:51:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:51:46,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-13 17:51:46,703 INFO L354 Elim1Store]: treesize reduction 74, result has 46.0 percent of original size [2021-11-13 17:51:46,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 163 [2021-11-13 17:51:46,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 110 [2021-11-13 17:51:46,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 80 [2021-11-13 17:51:46,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 17:51:46,780 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-13 17:51:46,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-11-13 17:51:47,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 11 [2021-11-13 17:51:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 328 proven. 12 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-13 17:51:47,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:51:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 54 [2021-11-13 17:51:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-13 17:51:47,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472700912] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:51:47,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:51:47,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 11 [2021-11-13 17:51:47,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830832282] [2021-11-13 17:51:47,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:47,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:51:47,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:51:47,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:51:47,609 INFO L87 Difference]: Start difference. First operand 3178 states and 4762 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:49,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:50,163 INFO L93 Difference]: Finished difference Result 6571 states and 9813 transitions. [2021-11-13 17:51:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:50,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-11-13 17:51:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:50,166 INFO L225 Difference]: With dead ends: 6571 [2021-11-13 17:51:50,166 INFO L226 Difference]: Without dead ends: 3416 [2021-11-13 17:51:50,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:51:50,172 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 126 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2261.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2334.94ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:50,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 357 Invalid, 314 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [55 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2334.94ms Time] [2021-11-13 17:51:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-11-13 17:51:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 3178. [2021-11-13 17:51:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3177 states have (on average 1.4828454516839786) internal successors, (4711), 3177 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4711 transitions. [2021-11-13 17:51:50,369 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4711 transitions. Word has length 249 [2021-11-13 17:51:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:50,369 INFO L470 AbstractCegarLoop]: Abstraction has 3178 states and 4711 transitions. [2021-11-13 17:51:50,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4711 transitions. [2021-11-13 17:51:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-13 17:51:50,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:50,372 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:50,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 17:51:50,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-13 17:51:50,587 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1268444927, now seen corresponding path program 1 times [2021-11-13 17:51:50,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:50,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694263678] [2021-11-13 17:51:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:50,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-13 17:51:50,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:50,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694263678] [2021-11-13 17:51:50,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694263678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:50,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:50,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:51:50,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102451100] [2021-11-13 17:51:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:50,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:51:50,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:51:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:51:50,691 INFO L87 Difference]: Start difference. First operand 3178 states and 4711 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:52,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:53,192 INFO L93 Difference]: Finished difference Result 5340 states and 7910 transitions. [2021-11-13 17:51:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:51:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-13 17:51:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:53,194 INFO L225 Difference]: With dead ends: 5340 [2021-11-13 17:51:53,194 INFO L226 Difference]: Without dead ends: 2185 [2021-11-13 17:51:53,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:51:53,195 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 141 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2270.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2344.31ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:53,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 401 Invalid, 389 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [61 Valid, 327 Invalid, 1 Unknown, 0 Unchecked, 2344.31ms Time] [2021-11-13 17:51:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-11-13 17:51:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 1762. [2021-11-13 17:51:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.4571266325951164) internal successors, (2566), 1761 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2566 transitions. [2021-11-13 17:51:53,281 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2566 transitions. Word has length 250 [2021-11-13 17:51:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:53,282 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 2566 transitions. [2021-11-13 17:51:53,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2566 transitions. [2021-11-13 17:51:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-13 17:51:53,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:53,284 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:53,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-11-13 17:51:53,285 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:53,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1556018017, now seen corresponding path program 1 times [2021-11-13 17:51:53,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:53,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718761962] [2021-11-13 17:51:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:53,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 374 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-13 17:51:53,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:53,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718761962] [2021-11-13 17:51:53,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718761962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:53,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:53,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:51:53,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585934398] [2021-11-13 17:51:53,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:53,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:51:53,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:51:53,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:51:53,480 INFO L87 Difference]: Start difference. First operand 1762 states and 2566 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:55,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:57,517 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:51:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:58,444 INFO L93 Difference]: Finished difference Result 4110 states and 5930 transitions. [2021-11-13 17:51:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:51:58,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-13 17:51:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:58,447 INFO L225 Difference]: With dead ends: 4110 [2021-11-13 17:51:58,447 INFO L226 Difference]: Without dead ends: 2371 [2021-11-13 17:51:58,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:51:58,448 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 299 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4577.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4723.24ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:58,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 806 Invalid, 533 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [48 Valid, 483 Invalid, 2 Unknown, 0 Unchecked, 4723.24ms Time] [2021-11-13 17:51:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-11-13 17:51:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1879. [2021-11-13 17:51:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 1.4653887113951012) internal successors, (2752), 1878 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 2752 transitions. [2021-11-13 17:51:58,543 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 2752 transitions. Word has length 251 [2021-11-13 17:51:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:58,543 INFO L470 AbstractCegarLoop]: Abstraction has 1879 states and 2752 transitions. [2021-11-13 17:51:58,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:51:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 2752 transitions. [2021-11-13 17:51:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-13 17:51:58,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:58,545 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:58,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-11-13 17:51:58,545 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:58,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1791911393, now seen corresponding path program 1 times [2021-11-13 17:51:58,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:58,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233470240] [2021-11-13 17:51:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:58,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 17:51:58,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:58,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233470240] [2021-11-13 17:51:58,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233470240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:58,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:58,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:51:58,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133758235] [2021-11-13 17:51:58,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:58,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:51:58,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:51:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:51:58,745 INFO L87 Difference]: Start difference. First operand 1879 states and 2752 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:00,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:02,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:04,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:06,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:08,415 INFO L93 Difference]: Finished difference Result 5252 states and 7640 transitions. [2021-11-13 17:52:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:52:08,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-13 17:52:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:08,418 INFO L225 Difference]: With dead ends: 5252 [2021-11-13 17:52:08,418 INFO L226 Difference]: Without dead ends: 3396 [2021-11-13 17:52:08,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:52:08,419 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 208 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 42 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9131.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9425.28ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:08,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1247 Invalid, 1026 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [42 Valid, 980 Invalid, 4 Unknown, 0 Unchecked, 9425.28ms Time] [2021-11-13 17:52:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3396 states. [2021-11-13 17:52:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3396 to 3142. [2021-11-13 17:52:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.4625915313594398) internal successors, (4594), 3141 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4594 transitions. [2021-11-13 17:52:08,570 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4594 transitions. Word has length 251 [2021-11-13 17:52:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:08,570 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4594 transitions. [2021-11-13 17:52:08,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4594 transitions. [2021-11-13 17:52:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-13 17:52:08,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:08,573 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:08,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-11-13 17:52:08,573 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:52:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash 204295532, now seen corresponding path program 1 times [2021-11-13 17:52:08,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:08,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789428190] [2021-11-13 17:52:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:08,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-13 17:52:08,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:08,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789428190] [2021-11-13 17:52:08,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789428190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:08,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:08,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:52:08,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112238999] [2021-11-13 17:52:08,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:08,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:08,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:08,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:08,762 INFO L87 Difference]: Start difference. First operand 3142 states and 4594 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:10,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:12,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:13,790 INFO L93 Difference]: Finished difference Result 6839 states and 9903 transitions. [2021-11-13 17:52:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:52:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2021-11-13 17:52:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:13,793 INFO L225 Difference]: With dead ends: 6839 [2021-11-13 17:52:13,793 INFO L226 Difference]: Without dead ends: 3720 [2021-11-13 17:52:13,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:52:13,795 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 294 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4547.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4691.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:13,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 805 Invalid, 533 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [48 Valid, 483 Invalid, 2 Unknown, 0 Unchecked, 4691.05ms Time] [2021-11-13 17:52:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-11-13 17:52:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3148. [2021-11-13 17:52:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 1.459802986971719) internal successors, (4594), 3147 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 4594 transitions. [2021-11-13 17:52:13,941 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 4594 transitions. Word has length 252 [2021-11-13 17:52:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:13,941 INFO L470 AbstractCegarLoop]: Abstraction has 3148 states and 4594 transitions. [2021-11-13 17:52:13,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 4594 transitions. [2021-11-13 17:52:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-13 17:52:13,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:13,945 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:13,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-11-13 17:52:13,946 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:52:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:13,946 INFO L85 PathProgramCache]: Analyzing trace with hash -502301074, now seen corresponding path program 1 times [2021-11-13 17:52:13,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:13,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363629302] [2021-11-13 17:52:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:13,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 17:52:14,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:14,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363629302] [2021-11-13 17:52:14,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363629302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:14,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:14,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:52:14,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508311649] [2021-11-13 17:52:14,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:14,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:52:14,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:52:14,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:52:14,172 INFO L87 Difference]: Start difference. First operand 3148 states and 4594 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:16,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:18,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:19,582 INFO L93 Difference]: Finished difference Result 7743 states and 11237 transitions. [2021-11-13 17:52:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:52:19,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2021-11-13 17:52:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:19,585 INFO L225 Difference]: With dead ends: 7743 [2021-11-13 17:52:19,585 INFO L226 Difference]: Without dead ends: 4618 [2021-11-13 17:52:19,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:52:19,587 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 315 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4895.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5098.71ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:19,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1107 Invalid, 882 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [65 Valid, 815 Invalid, 2 Unknown, 0 Unchecked, 5098.71ms Time] [2021-11-13 17:52:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4618 states. [2021-11-13 17:52:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4618 to 3151. [2021-11-13 17:52:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3151 states, 3150 states have (on average 1.4603174603174602) internal successors, (4600), 3150 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4600 transitions. [2021-11-13 17:52:19,733 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4600 transitions. Word has length 252 [2021-11-13 17:52:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:19,733 INFO L470 AbstractCegarLoop]: Abstraction has 3151 states and 4600 transitions. [2021-11-13 17:52:19,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4600 transitions. [2021-11-13 17:52:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-13 17:52:19,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:19,735 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:19,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-11-13 17:52:19,750 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:52:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1345889978, now seen corresponding path program 1 times [2021-11-13 17:52:19,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:19,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269847500] [2021-11-13 17:52:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:19,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-13 17:52:19,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:19,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269847500] [2021-11-13 17:52:19,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269847500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:19,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:19,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:52:19,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914065597] [2021-11-13 17:52:19,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:19,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:19,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:19,926 INFO L87 Difference]: Start difference. First operand 3151 states and 4600 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:22,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:23,326 INFO L93 Difference]: Finished difference Result 6821 states and 9867 transitions. [2021-11-13 17:52:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:52:23,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-11-13 17:52:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:23,329 INFO L225 Difference]: With dead ends: 6821 [2021-11-13 17:52:23,329 INFO L226 Difference]: Without dead ends: 3693 [2021-11-13 17:52:23,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:52:23,330 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 284 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2921.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3066.90ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:23,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 800 Invalid, 529 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [45 Valid, 483 Invalid, 1 Unknown, 0 Unchecked, 3066.90ms Time] [2021-11-13 17:52:23,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2021-11-13 17:52:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 3157. [2021-11-13 17:52:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 1.4575411913814955) internal successors, (4600), 3156 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 4600 transitions. [2021-11-13 17:52:23,507 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 4600 transitions. Word has length 253 [2021-11-13 17:52:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:23,507 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 4600 transitions. [2021-11-13 17:52:23,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 4600 transitions. [2021-11-13 17:52:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-13 17:52:23,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:23,510 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:23,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-11-13 17:52:23,510 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:52:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:23,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1775548284, now seen corresponding path program 1 times [2021-11-13 17:52:23,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:23,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835090467] [2021-11-13 17:52:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:23,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 17:52:23,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:23,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835090467] [2021-11-13 17:52:23,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835090467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:23,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:23,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:52:23,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003179331] [2021-11-13 17:52:23,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:23,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:52:23,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:52:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:52:23,708 INFO L87 Difference]: Start difference. First operand 3157 states and 4600 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:25,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:27,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:29,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:31,183 INFO L93 Difference]: Finished difference Result 7748 states and 11228 transitions. [2021-11-13 17:52:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:52:31,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-11-13 17:52:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:31,187 INFO L225 Difference]: With dead ends: 7748 [2021-11-13 17:52:31,187 INFO L226 Difference]: Without dead ends: 4614 [2021-11-13 17:52:31,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:52:31,189 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 352 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 81 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6911.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.21ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7149.82ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:31,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 1107 Invalid, 899 Unknown, 0 Unchecked, 3.21ms Time], IncrementalHoareTripleChecker [81 Valid, 815 Invalid, 3 Unknown, 0 Unchecked, 7149.82ms Time] [2021-11-13 17:52:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2021-11-13 17:52:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 3160. [2021-11-13 17:52:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 1.458056346945236) internal successors, (4606), 3159 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4606 transitions. [2021-11-13 17:52:31,357 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4606 transitions. Word has length 253 [2021-11-13 17:52:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:31,357 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4606 transitions. [2021-11-13 17:52:31,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4606 transitions. [2021-11-13 17:52:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-13 17:52:31,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:31,359 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:31,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-11-13 17:52:31,360 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:52:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1482178204, now seen corresponding path program 1 times [2021-11-13 17:52:31,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:31,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248011261] [2021-11-13 17:52:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:31,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2021-11-13 17:52:31,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:31,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248011261] [2021-11-13 17:52:31,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248011261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:31,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:31,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:52:31,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690911259] [2021-11-13 17:52:31,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:31,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:31,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:31,530 INFO L87 Difference]: Start difference. First operand 3160 states and 4606 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:33,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:35,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:52:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:36,032 INFO L93 Difference]: Finished difference Result 6317 states and 9208 transitions. [2021-11-13 17:52:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:52:36,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-13 17:52:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:36,035 INFO L225 Difference]: With dead ends: 6317 [2021-11-13 17:52:36,035 INFO L226 Difference]: Without dead ends: 3160 [2021-11-13 17:52:36,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:52:36,037 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4226.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4318.46ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:36,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 631 Invalid, 169 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 0 Unchecked, 4318.46ms Time] [2021-11-13 17:52:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-11-13 17:52:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 3160. [2021-11-13 17:52:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 1.4577397910731245) internal successors, (4605), 3159 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4605 transitions. [2021-11-13 17:52:36,250 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4605 transitions. Word has length 263 [2021-11-13 17:52:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:36,250 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4605 transitions. [2021-11-13 17:52:36,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4605 transitions. [2021-11-13 17:52:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-13 17:52:36,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:36,253 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:36,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-11-13 17:52:36,253 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:52:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash 350204006, now seen corresponding path program 1 times [2021-11-13 17:52:36,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:36,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250947615] [2021-11-13 17:52:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:36,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 302 proven. 225 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 17:52:36,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:36,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250947615] [2021-11-13 17:52:36,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250947615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:52:36,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936291944] [2021-11-13 17:52:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:36,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:36,918 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:36,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 17:52:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-13 17:52:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:59,653 WARN L227 SmtUtils]: Spent 22.16s on a formula simplification. DAG size of input: 59 DAG size of output: 15 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 17:52:59,653 INFO L354 Elim1Store]: treesize reduction 188, result has 10.0 percent of original size [2021-11-13 17:52:59,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 2584 treesize of output 2585 [2021-11-13 17:52:59,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:59,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:59,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:59,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:59,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2576 treesize of output 2569 [2021-11-13 17:52:59,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-13 17:52:59,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:52:59,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-13 17:52:59,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659657933] [2021-11-13 17:52:59,716 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:52:59,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:52:59,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:52:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:52:59,717 INFO L87 Difference]: Start difference. First operand 3160 states and 4605 transitions. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:52:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:52:59,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:52:59,719 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:59,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:52:59,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 17:52:59,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:59,947 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4db6d21e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 17:52:59,951 INFO L158 Benchmark]: Toolchain (without parser) took 421441.60ms. Allocated memory was 92.3MB in the beginning and 285.2MB in the end (delta: 192.9MB). Free memory was 59.1MB in the beginning and 168.0MB in the end (delta: -108.9MB). Peak memory consumption was 84.7MB. Max. memory is 16.1GB. [2021-11-13 17:52:59,951 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory was 48.7MB in the beginning and 48.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:52:59,951 INFO L158 Benchmark]: CACSL2BoogieTranslator took 963.34ms. Allocated memory was 92.3MB in the beginning and 123.7MB in the end (delta: 31.5MB). Free memory was 58.9MB in the beginning and 78.4MB in the end (delta: -19.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 17:52:59,951 INFO L158 Benchmark]: Boogie Procedure Inliner took 130.05ms. Allocated memory is still 123.7MB. Free memory was 78.4MB in the beginning and 73.7MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 17:52:59,951 INFO L158 Benchmark]: Boogie Preprocessor took 148.12ms. Allocated memory is still 123.7MB. Free memory was 73.7MB in the beginning and 66.3MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 17:52:59,952 INFO L158 Benchmark]: RCFGBuilder took 3892.05ms. Allocated memory is still 123.7MB. Free memory was 66.3MB in the beginning and 78.9MB in the end (delta: -12.6MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2021-11-13 17:52:59,952 INFO L158 Benchmark]: TraceAbstraction took 416297.83ms. Allocated memory was 123.7MB in the beginning and 285.2MB in the end (delta: 161.5MB). Free memory was 78.1MB in the beginning and 168.0MB in the end (delta: -89.9MB). Peak memory consumption was 72.6MB. Max. memory is 16.1GB. [2021-11-13 17:52:59,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory was 48.7MB in the beginning and 48.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 963.34ms. Allocated memory was 92.3MB in the beginning and 123.7MB in the end (delta: 31.5MB). Free memory was 58.9MB in the beginning and 78.4MB in the end (delta: -19.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 130.05ms. Allocated memory is still 123.7MB. Free memory was 78.4MB in the beginning and 73.7MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 148.12ms. Allocated memory is still 123.7MB. Free memory was 73.7MB in the beginning and 66.3MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 3892.05ms. Allocated memory is still 123.7MB. Free memory was 66.3MB in the beginning and 78.9MB in the end (delta: -12.6MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. * TraceAbstraction took 416297.83ms. Allocated memory was 123.7MB in the beginning and 285.2MB in the end (delta: 161.5MB). Free memory was 78.1MB in the beginning and 168.0MB in the end (delta: -89.9MB). Peak memory consumption was 72.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4db6d21e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4db6d21e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 17:53:00,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y --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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:53:02,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:53:02,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:53:02,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:53:02,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:53:02,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:53:02,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:53:02,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:53:02,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:53:02,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:53:02,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:53:02,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:53:02,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:53:02,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:53:02,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:53:02,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:53:02,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:53:02,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:53:02,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:53:02,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:53:02,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:53:02,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:53:02,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:53:02,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:53:02,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:53:02,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:53:02,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:53:02,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:53:02,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:53:02,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:53:02,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:53:02,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:53:02,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:53:02,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:53:02,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:53:02,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:53:02,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:53:02,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:53:02,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:53:02,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:53:02,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:53:02,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-13 17:53:02,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:53:02,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:53:02,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:53:02,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:53:02,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:53:02,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:53:02,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:53:02,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:53:02,387 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:53:02,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:53:02,389 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:53:02,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:53:02,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:53:02,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:53:02,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:53:02,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:53:02,390 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 17:53:02,390 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 17:53:02,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:53:02,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:53:02,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:53:02,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:53:02,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:53:02,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:53:02,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:53:02,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:53:02,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:53:02,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:53:02,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:53:02,393 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 17:53:02,393 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 17:53:02,393 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:53:02,394 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:53:02,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:53:02,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:53:02,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 17:53:02,395 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-13 17:53:02,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:53:02,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:53:02,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:53:02,851 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:53:02,852 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:53:02,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-13 17:53:02,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data/d41fbd644/73bedefe68d547848eda594b2e75ef62/FLAGb7be95bea [2021-11-13 17:53:03,650 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:53:03,650 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-13 17:53:03,679 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data/d41fbd644/73bedefe68d547848eda594b2e75ef62/FLAGb7be95bea [2021-11-13 17:53:03,797 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/data/d41fbd644/73bedefe68d547848eda594b2e75ef62 [2021-11-13 17:53:03,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:53:03,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:53:03,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:53:03,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:53:03,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:53:03,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:53:03" (1/1) ... [2021-11-13 17:53:03,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ad1383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:03, skipping insertion in model container [2021-11-13 17:53:03,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:53:03" (1/1) ... [2021-11-13 17:53:03,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:53:03,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:53:04,360 WARN L228 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_02035cf3-06a2-4caf-97d4-89d55930c95d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-13 17:53:04,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:53:04,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:53:04,506 WARN L228 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_02035cf3-06a2-4caf-97d4-89d55930c95d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-13 17:53:04,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:53:04,549 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:53:04,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04 WrapperNode [2021-11-13 17:53:04,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:53:04,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:53:04,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:53:04,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:53:04,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:53:04,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:53:04,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:53:04,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:53:04,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:53:04,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:53:04,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:53:04,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:53:04,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (1/1) ... [2021-11-13 17:53:04,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:53:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:04,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:53:04,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:53:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 17:53:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:53:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:53:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 17:53:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:53:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:53:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:53:04,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:53:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 17:53:05,093 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-13 17:53:09,284 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-13 17:53:09,284 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-13 17:53:09,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:53:09,292 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:53:09,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:53:09 BoogieIcfgContainer [2021-11-13 17:53:09,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:53:09,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:53:09,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:53:09,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:53:09,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:53:03" (1/3) ... [2021-11-13 17:53:09,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e022f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:53:09, skipping insertion in model container [2021-11-13 17:53:09,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:04" (2/3) ... [2021-11-13 17:53:09,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e022f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:53:09, skipping insertion in model container [2021-11-13 17:53:09,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:53:09" (3/3) ... [2021-11-13 17:53:09,301 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2021-11-13 17:53:09,307 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:53:09,307 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:53:09,367 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:53:09,375 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:53:09,376 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:53:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 17:53:09,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:09,413 INFO L514 BasicCegarLoop]: 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] [2021-11-13 17:53:09,414 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2021-11-13 17:53:09,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:53:09,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626286650] [2021-11-13 17:53:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:09,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:53:09,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:53:09,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:53:09,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 17:53:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:09,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:53:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:10,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:10,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:53:10,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626286650] [2021-11-13 17:53:10,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626286650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:10,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:10,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 17:53:10,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830002570] [2021-11-13 17:53:10,506 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:10,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:53:10,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:53:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:53:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:53:10,542 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:10,704 INFO L93 Difference]: Finished difference Result 542 states and 920 transitions. [2021-11-13 17:53:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:53:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-13 17:53:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:10,736 INFO L225 Difference]: With dead ends: 542 [2021-11-13 17:53:10,736 INFO L226 Difference]: Without dead ends: 368 [2021-11-13 17:53:10,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:53:10,756 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 370 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.77ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.64ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:10,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 667 Invalid, 37 Unknown, 0 Unchecked, 9.77ms Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 77.64ms Time] [2021-11-13 17:53:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-13 17:53:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2021-11-13 17:53:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5231607629427792) internal successors, (559), 367 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 559 transitions. [2021-11-13 17:53:10,849 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 559 transitions. Word has length 47 [2021-11-13 17:53:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:10,849 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 559 transitions. [2021-11-13 17:53:10,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 559 transitions. [2021-11-13 17:53:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 17:53:10,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:10,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:10,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:11,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:53:11,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:11,071 INFO L85 PathProgramCache]: Analyzing trace with hash -483730754, now seen corresponding path program 1 times [2021-11-13 17:53:11,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:53:11,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500202643] [2021-11-13 17:53:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:11,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:53:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:53:11,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:53:11,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 17:53:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:11,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:53:11,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:11,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:11,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:53:11,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500202643] [2021-11-13 17:53:11,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500202643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:11,983 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:11,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 17:53:11,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772860021] [2021-11-13 17:53:11,984 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:11,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:53:11,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:53:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:53:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:53:11,989 INFO L87 Difference]: Start difference. First operand 368 states and 559 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:12,094 INFO L93 Difference]: Finished difference Result 723 states and 1103 transitions. [2021-11-13 17:53:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:53:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-13 17:53:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:12,100 INFO L225 Difference]: With dead ends: 723 [2021-11-13 17:53:12,103 INFO L226 Difference]: Without dead ends: 484 [2021-11-13 17:53:12,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:53:12,110 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:12,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 557 Invalid, 16 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 74.75ms Time] [2021-11-13 17:53:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-13 17:53:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-11-13 17:53:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 483 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 734 transitions. [2021-11-13 17:53:12,163 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 734 transitions. Word has length 87 [2021-11-13 17:53:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:12,163 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 734 transitions. [2021-11-13 17:53:12,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 734 transitions. [2021-11-13 17:53:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 17:53:12,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:12,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:12,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:12,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:53:12,393 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:12,394 INFO L85 PathProgramCache]: Analyzing trace with hash 595564554, now seen corresponding path program 1 times [2021-11-13 17:53:12,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:53:12,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123583484] [2021-11-13 17:53:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:12,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:53:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:53:12,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:53:12,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 17:53:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:12,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:53:12,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:53:13,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:53:13,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:53:13,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123583484] [2021-11-13 17:53:13,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123583484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:13,403 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:13,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 17:53:13,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297666834] [2021-11-13 17:53:13,403 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:13,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:53:13,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:53:13,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:53:13,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:53:13,405 INFO L87 Difference]: Start difference. First operand 484 states and 734 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:13,552 INFO L93 Difference]: Finished difference Result 1074 states and 1637 transitions. [2021-11-13 17:53:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:53:13,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-13 17:53:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:13,560 INFO L225 Difference]: With dead ends: 1074 [2021-11-13 17:53:13,560 INFO L226 Difference]: Without dead ends: 719 [2021-11-13 17:53:13,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:53:13,573 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 324 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.41ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:13,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 724 Invalid, 35 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 105.41ms Time] [2021-11-13 17:53:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-13 17:53:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-13 17:53:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5181058495821727) internal successors, (1090), 718 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1090 transitions. [2021-11-13 17:53:13,617 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1090 transitions. Word has length 109 [2021-11-13 17:53:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:13,619 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1090 transitions. [2021-11-13 17:53:13,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1090 transitions. [2021-11-13 17:53:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 17:53:13,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:13,629 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:13,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:13,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:53:13,846 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:13,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash -65336556, now seen corresponding path program 1 times [2021-11-13 17:53:13,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:53:13,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333632282] [2021-11-13 17:53:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:13,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:53:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:53:13,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:53:13,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 17:53:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:14,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 17:53:14,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:14,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:53:14,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:53:14,503 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-13 17:53:14,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-11-13 17:53:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:14,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:14,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:14,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-13 17:53:14,672 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 17:53:14,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 17:53:14,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:53:14,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 17:53:14,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-13 17:53:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-13 17:53:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-13 17:53:15,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-13 17:53:16,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:53:16,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333632282] [2021-11-13 17:53:16,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333632282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:16,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:16,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 17:53:16,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429690363] [2021-11-13 17:53:16,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:16,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:53:16,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:53:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:53:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:53:16,143 INFO L87 Difference]: Start difference. First operand 719 states and 1090 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:18,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:53:20,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:53:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:22,664 INFO L93 Difference]: Finished difference Result 1435 states and 2176 transitions. [2021-11-13 17:53:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:53:22,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-13 17:53:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:22,671 INFO L225 Difference]: With dead ends: 1435 [2021-11-13 17:53:22,671 INFO L226 Difference]: Without dead ends: 719 [2021-11-13 17:53:22,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:53:22,677 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6048.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 6304.34ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:22,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 967 Invalid, 232 Unknown, 0 Unchecked, 4.69ms Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 2 Unknown, 58 Unchecked, 6304.34ms Time] [2021-11-13 17:53:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-13 17:53:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-13 17:53:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5167130919220055) internal successors, (1089), 718 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1089 transitions. [2021-11-13 17:53:22,710 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1089 transitions. Word has length 150 [2021-11-13 17:53:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:22,710 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1089 transitions. [2021-11-13 17:53:22,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1089 transitions. [2021-11-13 17:53:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 17:53:22,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:22,720 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:22,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-13 17:53:22,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:53:22,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash -329984046, now seen corresponding path program 1 times [2021-11-13 17:53:22,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:53:22,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518064969] [2021-11-13 17:53:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:22,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:53:22,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:53:22,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:53:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 17:53:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:53:23,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:23,580 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:53:23,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:53:23,901 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:53:23,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:53:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 17:53:24,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 17:53:24,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:53:24,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518064969] [2021-11-13 17:53:24,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518064969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:24,573 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:24,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:53:24,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740381091] [2021-11-13 17:53:24,574 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:24,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:53:24,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:53:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:53:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:53:24,575 INFO L87 Difference]: Start difference. First operand 719 states and 1089 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:26,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:53:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:35,218 INFO L93 Difference]: Finished difference Result 2592 states and 3954 transitions. [2021-11-13 17:53:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:53:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-13 17:53:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:35,237 INFO L225 Difference]: With dead ends: 2592 [2021-11-13 17:53:35,238 INFO L226 Difference]: Without dead ends: 1883 [2021-11-13 17:53:35,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:53:35,241 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 237 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 72 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9780.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.94ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10472.04ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:35,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 728 Invalid, 797 Unknown, 0 Unchecked, 11.94ms Time], IncrementalHoareTripleChecker [72 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 10472.04ms Time] [2021-11-13 17:53:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-11-13 17:53:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 851. [2021-11-13 17:53:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.5494117647058823) internal successors, (1317), 850 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1317 transitions. [2021-11-13 17:53:35,289 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1317 transitions. Word has length 150 [2021-11-13 17:53:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:35,290 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1317 transitions. [2021-11-13 17:53:35,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1317 transitions. [2021-11-13 17:53:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 17:53:35,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:35,298 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:35,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:35,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:53:35,513 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1210495758, now seen corresponding path program 1 times [2021-11-13 17:53:35,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:53:35,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375452311] [2021-11-13 17:53:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:35,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:53:35,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:53:35,515 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:53:35,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 17:53:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:35,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:53:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:36,101 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:53:36,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:53:36,421 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:53:36,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:53:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 17:53:36,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 17:53:37,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:53:37,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375452311] [2021-11-13 17:53:37,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375452311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:37,008 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:37,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:53:37,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774177933] [2021-11-13 17:53:37,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:37,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:53:37,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:53:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:53:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:53:37,010 INFO L87 Difference]: Start difference. First operand 851 states and 1317 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:39,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:53:41,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:53:46,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:46,701 INFO L93 Difference]: Finished difference Result 2807 states and 4330 transitions. [2021-11-13 17:53:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:53:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-13 17:53:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:46,716 INFO L225 Difference]: With dead ends: 2807 [2021-11-13 17:53:46,716 INFO L226 Difference]: Without dead ends: 1966 [2021-11-13 17:53:46,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:53:46,719 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 228 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9041.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.50ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9553.85ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:46,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 540 Invalid, 614 Unknown, 0 Unchecked, 5.50ms Time], IncrementalHoareTripleChecker [74 Valid, 538 Invalid, 2 Unknown, 0 Unchecked, 9553.85ms Time] [2021-11-13 17:53:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-11-13 17:53:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 967. [2021-11-13 17:53:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 1.5714285714285714) internal successors, (1518), 966 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1518 transitions. [2021-11-13 17:53:46,769 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1518 transitions. Word has length 151 [2021-11-13 17:53:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:46,770 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1518 transitions. [2021-11-13 17:53:46,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1518 transitions. [2021-11-13 17:53:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-13 17:53:46,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:46,774 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:46,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:46,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:53:46,990 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:46,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:46,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1783349868, now seen corresponding path program 1 times [2021-11-13 17:53:46,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:53:46,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771359733] [2021-11-13 17:53:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:46,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:53:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:53:46,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:53:47,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 17:53:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:53:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:47,633 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:53:47,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:53:47,853 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:53:47,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:53:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:53:48,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:53:48,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:53:48,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771359733] [2021-11-13 17:53:48,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771359733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:48,467 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:48,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:53:48,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132155869] [2021-11-13 17:53:48,468 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:48,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:53:48,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:53:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:53:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:53:48,469 INFO L87 Difference]: Start difference. First operand 967 states and 1518 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:50,482 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:53:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:56,489 INFO L93 Difference]: Finished difference Result 2921 states and 4538 transitions. [2021-11-13 17:53:56,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:53:56,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-13 17:53:56,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:56,504 INFO L225 Difference]: With dead ends: 2921 [2021-11-13 17:53:56,504 INFO L226 Difference]: Without dead ends: 2104 [2021-11-13 17:53:56,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:53:56,507 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 226 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7331.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.50ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7870.56ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:56,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 833 Invalid, 601 Unknown, 0 Unchecked, 5.50ms Time], IncrementalHoareTripleChecker [52 Valid, 548 Invalid, 1 Unknown, 0 Unchecked, 7870.56ms Time] [2021-11-13 17:53:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-13 17:53:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1081. [2021-11-13 17:53:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.5787037037037037) internal successors, (1705), 1080 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1705 transitions. [2021-11-13 17:53:56,565 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1705 transitions. Word has length 167 [2021-11-13 17:53:56,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:56,565 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1705 transitions. [2021-11-13 17:53:56,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:53:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1705 transitions. [2021-11-13 17:53:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-13 17:53:56,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:56,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:56,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:56,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:53:56,783 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash 113892171, now seen corresponding path program 1 times [2021-11-13 17:53:56,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:53:56,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664919600] [2021-11-13 17:53:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:56,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:53:56,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:53:56,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:53:56,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 17:53:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:57,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:53:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:57,339 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:53:57,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:53:57,597 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:53:57,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:53:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:53:57,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:53:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:53:58,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:53:58,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664919600] [2021-11-13 17:53:58,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664919600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:58,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:58,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:53:58,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814735831] [2021-11-13 17:53:58,204 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:58,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:53:58,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:53:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:53:58,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:53:58,206 INFO L87 Difference]: Start difference. First operand 1081 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:00,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:02,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:07,451 INFO L93 Difference]: Finished difference Result 3027 states and 4697 transitions. [2021-11-13 17:54:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:54:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-13 17:54:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:07,465 INFO L225 Difference]: With dead ends: 3027 [2021-11-13 17:54:07,465 INFO L226 Difference]: Without dead ends: 2115 [2021-11-13 17:54:07,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:07,468 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 231 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8577.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.14ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9109.19ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:07,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 536 Invalid, 614 Unknown, 0 Unchecked, 5.14ms Time], IncrementalHoareTripleChecker [72 Valid, 540 Invalid, 2 Unknown, 0 Unchecked, 9109.19ms Time] [2021-11-13 17:54:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-11-13 17:54:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1098. [2021-11-13 17:54:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 1.5733819507748406) internal successors, (1726), 1097 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1726 transitions. [2021-11-13 17:54:07,528 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1726 transitions. Word has length 168 [2021-11-13 17:54:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:07,529 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 1726 transitions. [2021-11-13 17:54:07,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1726 transitions. [2021-11-13 17:54:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-13 17:54:07,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:07,533 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:07,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-13 17:54:07,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:54:07,749 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash 137677863, now seen corresponding path program 1 times [2021-11-13 17:54:07,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:54:07,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923057479] [2021-11-13 17:54:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:07,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:54:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:54:07,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:54:07,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 17:54:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:08,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:54:08,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:08,317 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:54:08,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:54:08,543 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:54:08,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:54:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:54:08,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:54:09,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:54:09,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923057479] [2021-11-13 17:54:09,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923057479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:09,168 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:09,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:54:09,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861353116] [2021-11-13 17:54:09,168 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:09,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:54:09,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:54:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:54:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:54:09,169 INFO L87 Difference]: Start difference. First operand 1098 states and 1726 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:11,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:16,151 INFO L93 Difference]: Finished difference Result 3138 states and 4862 transitions. [2021-11-13 17:54:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:54:16,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-13 17:54:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:16,166 INFO L225 Difference]: With dead ends: 3138 [2021-11-13 17:54:16,166 INFO L226 Difference]: Without dead ends: 2221 [2021-11-13 17:54:16,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:16,169 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 226 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6347.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.99ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6833.25ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:16,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 525 Invalid, 599 Unknown, 0 Unchecked, 3.99ms Time], IncrementalHoareTripleChecker [71 Valid, 527 Invalid, 1 Unknown, 0 Unchecked, 6833.25ms Time] [2021-11-13 17:54:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-11-13 17:54:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1224. [2021-11-13 17:54:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.5739983646770237) internal successors, (1925), 1223 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1925 transitions. [2021-11-13 17:54:16,261 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1925 transitions. Word has length 169 [2021-11-13 17:54:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:16,262 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1925 transitions. [2021-11-13 17:54:16,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1925 transitions. [2021-11-13 17:54:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-13 17:54:16,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:16,267 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:16,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:16,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:54:16,488 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:16,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2080444553, now seen corresponding path program 1 times [2021-11-13 17:54:16,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:54:16,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128763894] [2021-11-13 17:54:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:16,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:54:16,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:54:16,490 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:54:16,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 17:54:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:54:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:17,046 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:54:17,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:54:17,411 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:54:17,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:54:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:54:17,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 17:54:18,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:54:18,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128763894] [2021-11-13 17:54:18,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128763894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:18,094 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:18,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:54:18,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330150145] [2021-11-13 17:54:18,095 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:18,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:54:18,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:54:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:54:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:54:18,096 INFO L87 Difference]: Start difference. First operand 1224 states and 1925 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:20,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:25,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:25,017 INFO L93 Difference]: Finished difference Result 3517 states and 5454 transitions. [2021-11-13 17:54:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:54:25,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-13 17:54:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:25,031 INFO L225 Difference]: With dead ends: 3517 [2021-11-13 17:54:25,031 INFO L226 Difference]: Without dead ends: 2314 [2021-11-13 17:54:25,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:25,034 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 201 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6330.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.88ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6791.73ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:25,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 556 Invalid, 565 Unknown, 0 Unchecked, 3.88ms Time], IncrementalHoareTripleChecker [58 Valid, 506 Invalid, 1 Unknown, 0 Unchecked, 6791.73ms Time] [2021-11-13 17:54:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-11-13 17:54:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1416. [2021-11-13 17:54:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.5851590106007067) internal successors, (2243), 1415 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2243 transitions. [2021-11-13 17:54:25,142 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2243 transitions. Word has length 179 [2021-11-13 17:54:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:25,145 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2243 transitions. [2021-11-13 17:54:25,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2243 transitions. [2021-11-13 17:54:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-13 17:54:25,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:25,157 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:25,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:25,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:54:25,373 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1105638902, now seen corresponding path program 1 times [2021-11-13 17:54:25,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:54:25,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945900608] [2021-11-13 17:54:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:25,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:54:25,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:54:25,375 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:54:25,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 17:54:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:25,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:54:25,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:26,025 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:54:26,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:54:26,128 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:54:26,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:54:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:54:26,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:54:26,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:54:26,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945900608] [2021-11-13 17:54:26,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945900608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:26,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:26,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:54:26,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522168853] [2021-11-13 17:54:26,838 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:26,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:54:26,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:54:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:54:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:54:26,839 INFO L87 Difference]: Start difference. First operand 1416 states and 2243 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:28,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:34,347 INFO L93 Difference]: Finished difference Result 3770 states and 5882 transitions. [2021-11-13 17:54:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:54:34,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-13 17:54:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:34,360 INFO L225 Difference]: With dead ends: 3770 [2021-11-13 17:54:34,360 INFO L226 Difference]: Without dead ends: 2375 [2021-11-13 17:54:34,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:34,363 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 243 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6877.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.90ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7360.20ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:34,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 519 Invalid, 585 Unknown, 0 Unchecked, 3.90ms Time], IncrementalHoareTripleChecker [69 Valid, 515 Invalid, 1 Unknown, 0 Unchecked, 7360.20ms Time] [2021-11-13 17:54:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-13 17:54:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-11-13 17:54:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.563957597173145) internal successors, (2213), 1415 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2213 transitions. [2021-11-13 17:54:34,456 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2213 transitions. Word has length 182 [2021-11-13 17:54:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:34,457 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2213 transitions. [2021-11-13 17:54:34,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2213 transitions. [2021-11-13 17:54:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-13 17:54:34,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:34,461 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:34,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:34,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:54:34,674 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 612161782, now seen corresponding path program 1 times [2021-11-13 17:54:34,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:54:34,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256637208] [2021-11-13 17:54:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:34,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:54:34,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:54:34,676 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:54:34,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 17:54:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:54:35,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:35,234 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:54:35,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:54:35,352 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:54:35,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:54:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:54:35,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:54:36,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:54:36,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256637208] [2021-11-13 17:54:36,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256637208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:36,046 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:36,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:54:36,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020464141] [2021-11-13 17:54:36,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:36,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:54:36,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:54:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:54:36,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:54:36,048 INFO L87 Difference]: Start difference. First operand 1416 states and 2213 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:38,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:40,078 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:45,728 INFO L93 Difference]: Finished difference Result 3770 states and 5818 transitions. [2021-11-13 17:54:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:54:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-13 17:54:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:45,738 INFO L225 Difference]: With dead ends: 3770 [2021-11-13 17:54:45,738 INFO L226 Difference]: Without dead ends: 2375 [2021-11-13 17:54:45,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:45,741 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 239 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9020.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.43ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9523.14ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:45,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 524 Invalid, 592 Unknown, 0 Unchecked, 3.43ms Time], IncrementalHoareTripleChecker [69 Valid, 521 Invalid, 2 Unknown, 0 Unchecked, 9523.14ms Time] [2021-11-13 17:54:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-13 17:54:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-11-13 17:54:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.542756183745583) internal successors, (2183), 1415 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2183 transitions. [2021-11-13 17:54:45,825 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2183 transitions. Word has length 182 [2021-11-13 17:54:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:45,826 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2183 transitions. [2021-11-13 17:54:45,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2183 transitions. [2021-11-13 17:54:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-13 17:54:45,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:45,830 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:45,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 17:54:46,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:54:46,047 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash 610130770, now seen corresponding path program 1 times [2021-11-13 17:54:46,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:54:46,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253198257] [2021-11-13 17:54:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:46,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:54:46,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:54:46,049 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:54:46,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 17:54:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:54:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:46,603 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:54:46,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:54:46,731 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:54:46,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:54:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:54:46,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:54:47,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:54:47,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253198257] [2021-11-13 17:54:47,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253198257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:47,457 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:47,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:54:47,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006999185] [2021-11-13 17:54:47,457 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:47,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:54:47,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:54:47,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:54:47,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:54:47,459 INFO L87 Difference]: Start difference. First operand 1416 states and 2183 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:49,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:54,810 INFO L93 Difference]: Finished difference Result 3770 states and 5754 transitions. [2021-11-13 17:54:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:54:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-13 17:54:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:54,819 INFO L225 Difference]: With dead ends: 3770 [2021-11-13 17:54:54,819 INFO L226 Difference]: Without dead ends: 2375 [2021-11-13 17:54:54,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:54,821 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 235 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6703.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.53ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7193.90ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:54,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 522 Invalid, 591 Unknown, 0 Unchecked, 3.53ms Time], IncrementalHoareTripleChecker [69 Valid, 521 Invalid, 1 Unknown, 0 Unchecked, 7193.90ms Time] [2021-11-13 17:54:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-13 17:54:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-11-13 17:54:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.5215547703180212) internal successors, (2153), 1415 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2153 transitions. [2021-11-13 17:54:54,907 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2153 transitions. Word has length 183 [2021-11-13 17:54:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:54,907 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2153 transitions. [2021-11-13 17:54:54,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2153 transitions. [2021-11-13 17:54:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 17:54:54,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:54,911 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:54,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:55,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:54:55,129 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash 944860177, now seen corresponding path program 1 times [2021-11-13 17:54:55,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:54:55,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084154056] [2021-11-13 17:54:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:55,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:54:55,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:54:55,131 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:54:55,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 17:54:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:55,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:54:55,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:55,725 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:54:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:54:55,921 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:54:55,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:54:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:54:56,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:54:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:54:56,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:54:56,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084154056] [2021-11-13 17:54:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084154056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:56,665 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:56,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:54:56,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123150273] [2021-11-13 17:54:56,666 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:54:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:54:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:54:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:54:56,667 INFO L87 Difference]: Start difference. First operand 1416 states and 2153 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:54:58,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:00,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:07,612 INFO L93 Difference]: Finished difference Result 3770 states and 5690 transitions. [2021-11-13 17:55:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:55:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-13 17:55:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:07,624 INFO L225 Difference]: With dead ends: 3770 [2021-11-13 17:55:07,624 INFO L226 Difference]: Without dead ends: 2375 [2021-11-13 17:55:07,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:07,627 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 231 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10142.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.20ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10780.29ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:07,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 683 Invalid, 758 Unknown, 0 Unchecked, 4.20ms Time], IncrementalHoareTripleChecker [69 Valid, 687 Invalid, 2 Unknown, 0 Unchecked, 10780.29ms Time] [2021-11-13 17:55:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-13 17:55:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1416. [2021-11-13 17:55:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.5003533568904595) internal successors, (2123), 1415 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2123 transitions. [2021-11-13 17:55:07,718 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2123 transitions. Word has length 184 [2021-11-13 17:55:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:07,719 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2123 transitions. [2021-11-13 17:55:07,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2123 transitions. [2021-11-13 17:55:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 17:55:07,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:07,730 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:07,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:07,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:55:07,946 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:07,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1165739315, now seen corresponding path program 1 times [2021-11-13 17:55:07,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:55:07,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594491426] [2021-11-13 17:55:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:07,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:55:07,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:55:07,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:55:07,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 17:55:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:55:08,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:08,540 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:55:08,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:55:08,708 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:55:08,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:55:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:55:08,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:55:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:55:09,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:55:09,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594491426] [2021-11-13 17:55:09,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594491426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:09,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:09,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:55:09,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116512484] [2021-11-13 17:55:09,456 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:09,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:55:09,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:55:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:55:09,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:55:09,457 INFO L87 Difference]: Start difference. First operand 1416 states and 2123 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:11,471 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:18,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:18,098 INFO L93 Difference]: Finished difference Result 3660 states and 5483 transitions. [2021-11-13 17:55:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:55:18,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-13 17:55:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:18,105 INFO L225 Difference]: With dead ends: 3660 [2021-11-13 17:55:18,105 INFO L226 Difference]: Without dead ends: 2265 [2021-11-13 17:55:18,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:18,108 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 213 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7901.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8468.65ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:18,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 672 Invalid, 692 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [59 Valid, 632 Invalid, 1 Unknown, 0 Unchecked, 8468.65ms Time] [2021-11-13 17:55:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-11-13 17:55:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1416. [2021-11-13 17:55:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.4791519434628975) internal successors, (2093), 1415 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2093 transitions. [2021-11-13 17:55:18,217 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2093 transitions. Word has length 185 [2021-11-13 17:55:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:18,218 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2093 transitions. [2021-11-13 17:55:18,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2093 transitions. [2021-11-13 17:55:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 17:55:18,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:18,222 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:18,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:18,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:55:18,439 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1602969417, now seen corresponding path program 1 times [2021-11-13 17:55:18,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:55:18,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741714048] [2021-11-13 17:55:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:18,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:55:18,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:55:18,441 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:55:18,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 17:55:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:18,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:55:18,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:18,967 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:55:18,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:55:19,141 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:55:19,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:55:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:55:19,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:55:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:55:19,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:55:19,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741714048] [2021-11-13 17:55:19,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741714048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:19,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:19,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:55:19,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202008260] [2021-11-13 17:55:19,971 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:19,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:55:19,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:55:19,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:55:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:55:19,972 INFO L87 Difference]: Start difference. First operand 1416 states and 2093 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:21,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:27,040 INFO L93 Difference]: Finished difference Result 3852 states and 5707 transitions. [2021-11-13 17:55:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:55:27,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-13 17:55:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:27,047 INFO L225 Difference]: With dead ends: 3852 [2021-11-13 17:55:27,047 INFO L226 Difference]: Without dead ends: 2457 [2021-11-13 17:55:27,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:27,049 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 209 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6430.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.36ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6888.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:27,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 504 Invalid, 539 Unknown, 0 Unchecked, 3.36ms Time], IncrementalHoareTripleChecker [58 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 6888.11ms Time] [2021-11-13 17:55:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-11-13 17:55:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1512. [2021-11-13 17:55:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.4526803441429517) internal successors, (2195), 1511 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2195 transitions. [2021-11-13 17:55:27,143 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2195 transitions. Word has length 192 [2021-11-13 17:55:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:27,144 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2195 transitions. [2021-11-13 17:55:27,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2195 transitions. [2021-11-13 17:55:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-13 17:55:27,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:27,148 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:27,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:27,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:55:27,365 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash 358080211, now seen corresponding path program 1 times [2021-11-13 17:55:27,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:55:27,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061498233] [2021-11-13 17:55:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:27,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:55:27,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:55:27,367 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:55:27,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 17:55:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:27,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:55:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:27,967 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:55:27,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:55:28,180 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:55:28,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:55:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:55:28,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:55:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:55:29,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:55:29,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061498233] [2021-11-13 17:55:29,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061498233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:29,021 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:29,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:55:29,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225679991] [2021-11-13 17:55:29,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:29,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:55:29,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:55:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:55:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:55:29,023 INFO L87 Difference]: Start difference. First operand 1512 states and 2195 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:31,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:33,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:39,538 INFO L93 Difference]: Finished difference Result 3842 states and 5609 transitions. [2021-11-13 17:55:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:55:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-13 17:55:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:39,544 INFO L225 Difference]: With dead ends: 3842 [2021-11-13 17:55:39,545 INFO L226 Difference]: Without dead ends: 2351 [2021-11-13 17:55:39,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:39,547 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 206 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9747.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.89ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10324.47ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:39,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 691 Invalid, 697 Unknown, 0 Unchecked, 3.89ms Time], IncrementalHoareTripleChecker [57 Valid, 638 Invalid, 2 Unknown, 0 Unchecked, 10324.47ms Time] [2021-11-13 17:55:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-11-13 17:55:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1512. [2021-11-13 17:55:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.4328259430840502) internal successors, (2165), 1511 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2165 transitions. [2021-11-13 17:55:39,641 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2165 transitions. Word has length 193 [2021-11-13 17:55:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:39,642 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2165 transitions. [2021-11-13 17:55:39,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2165 transitions. [2021-11-13 17:55:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 17:55:39,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:39,645 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:39,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:39,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:55:39,859 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash -885263924, now seen corresponding path program 1 times [2021-11-13 17:55:39,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:55:39,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006364393] [2021-11-13 17:55:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:39,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:55:39,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:55:39,861 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:55:39,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 17:55:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:40,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:55:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:40,431 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:55:40,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:55:40,853 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:55:40,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:55:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 17:55:41,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:55:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 17:55:41,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:55:41,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006364393] [2021-11-13 17:55:41,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006364393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:41,695 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:41,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:55:41,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54035335] [2021-11-13 17:55:41,695 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:41,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:55:41,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:55:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:55:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:55:41,697 INFO L87 Difference]: Start difference. First operand 1512 states and 2165 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:43,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:48,528 INFO L93 Difference]: Finished difference Result 3980 states and 5719 transitions. [2021-11-13 17:55:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:55:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-13 17:55:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:48,541 INFO L225 Difference]: With dead ends: 3980 [2021-11-13 17:55:48,541 INFO L226 Difference]: Without dead ends: 2489 [2021-11-13 17:55:48,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:48,544 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 172 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6203.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.24ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6651.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:48,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 503 Invalid, 532 Unknown, 0 Unchecked, 3.24ms Time], IncrementalHoareTripleChecker [55 Valid, 476 Invalid, 1 Unknown, 0 Unchecked, 6651.38ms Time] [2021-11-13 17:55:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-11-13 17:55:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1710. [2021-11-13 17:55:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 1.4353423054417789) internal successors, (2453), 1709 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2453 transitions. [2021-11-13 17:55:48,658 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2453 transitions. Word has length 200 [2021-11-13 17:55:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:48,658 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2453 transitions. [2021-11-13 17:55:48,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2453 transitions. [2021-11-13 17:55:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 17:55:48,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:48,662 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:48,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:48,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:55:48,878 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1051892435, now seen corresponding path program 1 times [2021-11-13 17:55:48,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:55:48,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520409495] [2021-11-13 17:55:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:48,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:55:48,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:55:48,881 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:55:48,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 17:55:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:49,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:55:49,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:49,456 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:55:49,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:55:49,865 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:55:49,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:55:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 17:55:50,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:55:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 17:55:50,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:55:50,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520409495] [2021-11-13 17:55:50,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520409495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:50,715 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:50,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:55:50,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537699907] [2021-11-13 17:55:50,716 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:50,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:55:50,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:55:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:55:50,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:55:50,717 INFO L87 Difference]: Start difference. First operand 1710 states and 2453 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:52,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:57,319 INFO L93 Difference]: Finished difference Result 4218 states and 6091 transitions. [2021-11-13 17:55:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:55:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-13 17:55:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:57,324 INFO L225 Difference]: With dead ends: 4218 [2021-11-13 17:55:57,324 INFO L226 Difference]: Without dead ends: 2529 [2021-11-13 17:55:57,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:57,326 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 166 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5966.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6401.66ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:57,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 501 Invalid, 528 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [57 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 6401.66ms Time] [2021-11-13 17:55:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-11-13 17:55:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1776. [2021-11-13 17:55:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 1.4529577464788732) internal successors, (2579), 1775 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2579 transitions. [2021-11-13 17:55:57,417 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2579 transitions. Word has length 201 [2021-11-13 17:55:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:57,418 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 2579 transitions. [2021-11-13 17:55:57,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:55:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2579 transitions. [2021-11-13 17:55:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 17:55:57,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:57,422 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:57,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:57,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:55:57,640 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1389126964, now seen corresponding path program 1 times [2021-11-13 17:55:57,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:55:57,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733530926] [2021-11-13 17:55:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:57,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:55:57,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:55:57,643 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:55:57,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 17:55:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:58,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:55:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:58,244 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:55:58,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:55:58,603 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:55:58,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:55:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:55:58,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:55:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:55:59,555 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:55:59,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733530926] [2021-11-13 17:55:59,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733530926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:59,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:59,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:55:59,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519308736] [2021-11-13 17:55:59,556 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:59,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:55:59,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:55:59,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:55:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:55:59,558 INFO L87 Difference]: Start difference. First operand 1776 states and 2579 transitions. Second operand has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:01,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:07,401 INFO L93 Difference]: Finished difference Result 4488 states and 6494 transitions. [2021-11-13 17:56:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:56:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-13 17:56:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:07,407 INFO L225 Difference]: With dead ends: 4488 [2021-11-13 17:56:07,407 INFO L226 Difference]: Without dead ends: 2733 [2021-11-13 17:56:07,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:56:07,410 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 172 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7107.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.72ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7637.83ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:07,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 660 Invalid, 670 Unknown, 0 Unchecked, 3.72ms Time], IncrementalHoareTripleChecker [51 Valid, 618 Invalid, 1 Unknown, 0 Unchecked, 7637.83ms Time] [2021-11-13 17:56:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-11-13 17:56:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1956. [2021-11-13 17:56:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.4419437340153454) internal successors, (2819), 1955 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2819 transitions. [2021-11-13 17:56:07,521 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2819 transitions. Word has length 206 [2021-11-13 17:56:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:07,521 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 2819 transitions. [2021-11-13 17:56:07,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2819 transitions. [2021-11-13 17:56:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 17:56:07,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:07,525 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:07,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 17:56:07,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:56:07,727 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:07,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash -612435472, now seen corresponding path program 1 times [2021-11-13 17:56:07,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:56:07,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26218593] [2021-11-13 17:56:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:07,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:56:07,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:56:07,730 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:56:07,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 17:56:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:56:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:56:08,292 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:56:08,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:56:08,692 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:56:08,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:56:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:56:08,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:56:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:56:09,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:56:09,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26218593] [2021-11-13 17:56:09,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26218593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:09,561 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:09,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:56:09,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900069905] [2021-11-13 17:56:09,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:09,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:56:09,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:56:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:56:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:56:09,563 INFO L87 Difference]: Start difference. First operand 1956 states and 2819 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:11,587 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:13,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:17,955 INFO L93 Difference]: Finished difference Result 4634 states and 6671 transitions. [2021-11-13 17:56:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:56:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-11-13 17:56:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:17,960 INFO L225 Difference]: With dead ends: 4634 [2021-11-13 17:56:17,961 INFO L226 Difference]: Without dead ends: 2699 [2021-11-13 17:56:17,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:56:17,963 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 168 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7739.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.13ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8173.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:17,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 519 Invalid, 538 Unknown, 0 Unchecked, 3.13ms Time], IncrementalHoareTripleChecker [57 Valid, 479 Invalid, 2 Unknown, 0 Unchecked, 8173.51ms Time] [2021-11-13 17:56:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-11-13 17:56:18,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 1956. [2021-11-13 17:56:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.4327365728900257) internal successors, (2801), 1955 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2801 transitions. [2021-11-13 17:56:18,094 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2801 transitions. Word has length 207 [2021-11-13 17:56:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:18,095 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 2801 transitions. [2021-11-13 17:56:18,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2801 transitions. [2021-11-13 17:56:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-13 17:56:18,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:18,099 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:18,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 17:56:18,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:56:18,315 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 899409284, now seen corresponding path program 1 times [2021-11-13 17:56:18,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:56:18,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407488743] [2021-11-13 17:56:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:18,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:56:18,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:56:18,317 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:56:18,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 17:56:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:18,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:56:18,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:56:18,929 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:56:18,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:56:19,267 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:56:19,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:56:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:56:19,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:56:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:56:20,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:56:20,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407488743] [2021-11-13 17:56:20,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407488743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:20,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:20,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:56:20,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985216893] [2021-11-13 17:56:20,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:20,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:56:20,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:56:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:56:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:56:20,143 INFO L87 Difference]: Start difference. First operand 1956 states and 2801 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:22,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:27,676 INFO L93 Difference]: Finished difference Result 4838 states and 6906 transitions. [2021-11-13 17:56:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:56:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-11-13 17:56:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:27,685 INFO L225 Difference]: With dead ends: 4838 [2021-11-13 17:56:27,685 INFO L226 Difference]: Without dead ends: 2903 [2021-11-13 17:56:27,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:56:27,688 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 172 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6759.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.63ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7294.67ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:27,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 676 Invalid, 683 Unknown, 0 Unchecked, 3.63ms Time], IncrementalHoareTripleChecker [55 Valid, 627 Invalid, 1 Unknown, 0 Unchecked, 7294.67ms Time] [2021-11-13 17:56:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-11-13 17:56:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2124. [2021-11-13 17:56:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.418276024493641) internal successors, (3011), 2123 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3011 transitions. [2021-11-13 17:56:27,847 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3011 transitions. Word has length 209 [2021-11-13 17:56:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:27,848 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 3011 transitions. [2021-11-13 17:56:27,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3011 transitions. [2021-11-13 17:56:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-13 17:56:27,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:27,852 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:27,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 17:56:28,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:56:28,070 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1495044440, now seen corresponding path program 1 times [2021-11-13 17:56:28,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:56:28,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421726229] [2021-11-13 17:56:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:28,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:56:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:56:28,073 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:56:28,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 17:56:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:56:28,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:56:28,641 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:56:28,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:56:28,985 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:56:28,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:56:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:56:29,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:56:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:56:29,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:56:29,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421726229] [2021-11-13 17:56:29,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421726229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:29,892 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:29,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:56:29,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878876891] [2021-11-13 17:56:29,892 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:29,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:56:29,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:56:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:56:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:56:29,893 INFO L87 Difference]: Start difference. First operand 2124 states and 3011 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:31,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:37,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:37,117 INFO L93 Difference]: Finished difference Result 4930 states and 6980 transitions. [2021-11-13 17:56:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:56:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-13 17:56:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:37,123 INFO L225 Difference]: With dead ends: 4930 [2021-11-13 17:56:37,123 INFO L226 Difference]: Without dead ends: 2827 [2021-11-13 17:56:37,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:56:37,126 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 160 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6446.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.64ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6936.59ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:37,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 635 Invalid, 641 Unknown, 0 Unchecked, 3.64ms Time], IncrementalHoareTripleChecker [57 Valid, 583 Invalid, 1 Unknown, 0 Unchecked, 6936.59ms Time] [2021-11-13 17:56:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2021-11-13 17:56:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2124. [2021-11-13 17:56:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.406971267074894) internal successors, (2987), 2123 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:37,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 2987 transitions. [2021-11-13 17:56:37,301 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 2987 transitions. Word has length 210 [2021-11-13 17:56:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:37,302 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 2987 transitions. [2021-11-13 17:56:37,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 2987 transitions. [2021-11-13 17:56:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-13 17:56:37,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:37,307 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:37,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 17:56:37,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:56:37,524 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1940297028, now seen corresponding path program 1 times [2021-11-13 17:56:37,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:56:37,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191482135] [2021-11-13 17:56:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:37,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:56:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:56:37,527 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:56:37,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 17:56:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 17:56:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:56:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:56:38,247 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:56:38,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 17:56:38,747 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:56:38,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:56:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-13 17:56:38,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:56:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-13 17:56:39,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:56:39,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191482135] [2021-11-13 17:56:39,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191482135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:39,226 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:39,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-13 17:56:39,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203289317] [2021-11-13 17:56:39,226 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:39,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:56:39,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:56:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:56:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:56:39,227 INFO L87 Difference]: Start difference. First operand 2124 states and 2987 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:41,254 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:42,994 INFO L93 Difference]: Finished difference Result 4579 states and 6420 transitions. [2021-11-13 17:56:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:56:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-13 17:56:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:43,001 INFO L225 Difference]: With dead ends: 4579 [2021-11-13 17:56:43,001 INFO L226 Difference]: Without dead ends: 2476 [2021-11-13 17:56:43,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:56:43,004 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 60 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3402.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3601.94ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:43,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 545 Invalid, 221 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 3601.94ms Time] [2021-11-13 17:56:43,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-11-13 17:56:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2380. [2021-11-13 17:56:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 1.403530895334174) internal successors, (3339), 2379 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3339 transitions. [2021-11-13 17:56:43,164 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3339 transitions. Word has length 222 [2021-11-13 17:56:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:43,164 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 3339 transitions. [2021-11-13 17:56:43,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3339 transitions. [2021-11-13 17:56:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-13 17:56:43,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:43,169 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:43,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 17:56:43,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:56:43,386 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:43,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1457276990, now seen corresponding path program 1 times [2021-11-13 17:56:43,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:56:43,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70931645] [2021-11-13 17:56:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:43,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:56:43,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:56:43,401 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:56:43,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 17:56:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 17:56:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:56:44,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:56:44,258 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:56:44,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 17:56:44,524 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:56:44,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-13 17:56:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-13 17:56:44,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:56:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-13 17:56:44,991 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:56:44,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70931645] [2021-11-13 17:56:44,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70931645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:44,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:44,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-13 17:56:44,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463562719] [2021-11-13 17:56:44,991 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:44,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:56:44,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:56:44,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:56:44,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:56:44,992 INFO L87 Difference]: Start difference. First operand 2380 states and 3339 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:47,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:49,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:51,421 INFO L93 Difference]: Finished difference Result 4855 states and 6800 transitions. [2021-11-13 17:56:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:56:51,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-13 17:56:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:51,427 INFO L225 Difference]: With dead ends: 4855 [2021-11-13 17:56:51,427 INFO L226 Difference]: Without dead ends: 2496 [2021-11-13 17:56:51,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:56:51,430 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 15 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6007.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6270.88ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:51,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 620 Invalid, 254 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 2 Unknown, 0 Unchecked, 6270.88ms Time] [2021-11-13 17:56:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-11-13 17:56:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2476. [2021-11-13 17:56:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 1.3975757575757575) internal successors, (3459), 2475 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 3459 transitions. [2021-11-13 17:56:51,589 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 3459 transitions. Word has length 222 [2021-11-13 17:56:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:51,589 INFO L470 AbstractCegarLoop]: Abstraction has 2476 states and 3459 transitions. [2021-11-13 17:56:51,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 3459 transitions. [2021-11-13 17:56:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 17:56:51,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:51,592 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:51,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 17:56:51,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:56:51,793 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1989337734, now seen corresponding path program 1 times [2021-11-13 17:56:51,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:56:51,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812444144] [2021-11-13 17:56:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:51,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:56:51,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:56:51,795 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:56:51,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 17:56:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:56:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:56:52,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:56:52,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-13 17:56:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-13 17:56:52,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:56:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-13 17:56:53,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:56:53,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812444144] [2021-11-13 17:56:53,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812444144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:53,092 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:53,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:56:53,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895564491] [2021-11-13 17:56:53,093 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:53,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:56:53,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:56:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:56:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:56:53,094 INFO L87 Difference]: Start difference. First operand 2476 states and 3459 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:56:55,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:00,540 INFO L93 Difference]: Finished difference Result 5866 states and 8175 transitions. [2021-11-13 17:57:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:57:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-13 17:57:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:00,545 INFO L225 Difference]: With dead ends: 5866 [2021-11-13 17:57:00,546 INFO L226 Difference]: Without dead ends: 3411 [2021-11-13 17:57:00,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:57:00,549 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 141 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6640.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.48ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7166.92ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:00,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 599 Invalid, 629 Unknown, 0 Unchecked, 3.48ms Time], IncrementalHoareTripleChecker [60 Valid, 568 Invalid, 1 Unknown, 0 Unchecked, 7166.92ms Time] [2021-11-13 17:57:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-11-13 17:57:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2700. [2021-11-13 17:57:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 1.4008892182289736) internal successors, (3781), 2699 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:57:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 3781 transitions. [2021-11-13 17:57:00,741 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 3781 transitions. Word has length 236 [2021-11-13 17:57:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:00,742 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 3781 transitions. [2021-11-13 17:57:00,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:57:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 3781 transitions. [2021-11-13 17:57:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-13 17:57:00,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:00,747 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:00,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:00,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:57:00,963 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1532743095, now seen corresponding path program 1 times [2021-11-13 17:57:00,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:57:00,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372962750] [2021-11-13 17:57:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:00,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:57:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:57:00,965 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:57:00,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 17:57:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:01,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:57:01,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:01,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:57:01,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-13 17:57:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-13 17:57:01,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:57:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-13 17:57:02,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:57:02,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372962750] [2021-11-13 17:57:02,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372962750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:02,302 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:02,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 17:57:02,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25951848] [2021-11-13 17:57:02,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:02,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:57:02,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:57:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:57:02,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:57:02,304 INFO L87 Difference]: Start difference. First operand 2700 states and 3781 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:57:04,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:10,086 INFO L93 Difference]: Finished difference Result 6113 states and 8553 transitions. [2021-11-13 17:57:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:57:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-13 17:57:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:10,090 INFO L225 Difference]: With dead ends: 6113 [2021-11-13 17:57:10,090 INFO L226 Difference]: Without dead ends: 3410 [2021-11-13 17:57:10,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:57:10,092 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 135 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7019.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.34ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7510.56ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:10,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 590 Invalid, 624 Unknown, 0 Unchecked, 3.34ms Time], IncrementalHoareTripleChecker [59 Valid, 564 Invalid, 1 Unknown, 0 Unchecked, 7510.56ms Time] [2021-11-13 17:57:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-11-13 17:57:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2739. [2021-11-13 17:57:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 1.4075967859751644) internal successors, (3854), 2738 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:57:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3854 transitions. [2021-11-13 17:57:10,287 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3854 transitions. Word has length 237 [2021-11-13 17:57:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:10,288 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 3854 transitions. [2021-11-13 17:57:10,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:57:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3854 transitions. [2021-11-13 17:57:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-13 17:57:10,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:10,293 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:10,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:10,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:57:10,506 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:10,507 INFO L85 PathProgramCache]: Analyzing trace with hash 350204006, now seen corresponding path program 1 times [2021-11-13 17:57:10,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:57:10,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141476441] [2021-11-13 17:57:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:10,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:57:10,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:57:10,509 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:57:10,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02035cf3-06a2-4caf-97d4-89d55930c95d/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 17:57:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-13 17:57:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates...