./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/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_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa --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 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:56:54,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:56:54,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:56:54,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:56:54,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:56:54,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:56:54,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:56:54,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:56:54,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:56:54,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:56:54,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:56:54,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:56:54,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:56:54,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:56:54,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:56:54,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:56:54,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:56:54,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:56:54,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:56:54,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:56:54,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:56:54,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:56:54,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:56:54,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:56:54,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:56:54,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:56:54,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:56:54,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:56:54,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:56:54,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:56:54,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:56:54,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:56:54,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:56:54,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:56:54,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:56:54,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:56:54,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:56:54,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:56:54,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:56:54,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:56:54,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:56:54,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:56:54,495 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:56:54,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:56:54,495 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:56:54,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:56:54,496 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:56:54,496 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:56:54,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:56:54,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:56:54,497 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:56:54,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:56:54,497 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:56:54,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:56:54,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:56:54,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:56:54,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:56:54,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:56:54,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:56:54,498 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:56:54,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:56:54,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:56:54,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:56:54,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:56:54,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:56:54,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:56:54,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:56:54,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:56:54,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:56:54,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:56:54,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:56:54,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:56:54,500 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:56:54,500 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:56:54,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:56:54,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:56:54,500 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_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-12-06 17:56:54,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:56:54,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:56:54,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:56:54,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:56:54,701 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:56:54,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-12-06 17:56:54,744 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/data/24a0c1a31/621148bfcd094275907bc15a54bc566b/FLAGf653ff7fe [2021-12-06 17:56:55,248 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:56:55,249 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-12-06 17:56:55,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/data/24a0c1a31/621148bfcd094275907bc15a54bc566b/FLAGf653ff7fe [2021-12-06 17:56:55,732 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/data/24a0c1a31/621148bfcd094275907bc15a54bc566b [2021-12-06 17:56:55,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:56:55,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:56:55,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:56:55,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:56:55,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:56:55,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:56:55" (1/1) ... [2021-12-06 17:56:55,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b0156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:55, skipping insertion in model container [2021-12-06 17:56:55,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:56:55" (1/1) ... [2021-12-06 17:56:55,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:56:55,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:56:56,037 WARN L230 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_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-12-06 17:56:56,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:56:56,054 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:56:56,127 WARN L230 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_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-12-06 17:56:56,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:56:56,141 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:56:56,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56 WrapperNode [2021-12-06 17:56:56,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:56:56,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:56:56,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:56:56,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:56:56,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,206 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 782 [2021-12-06 17:56:56,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:56:56,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:56:56,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:56:56,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:56:56,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:56:56,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:56:56,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:56:56,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:56:56,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (1/1) ... [2021-12-06 17:56:56,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:56:56,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:56,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:56:56,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:56:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:56:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 17:56:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:56:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:56:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 17:56:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:56:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:56:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:56:56,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:56:56,445 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:56:56,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:56:56,464 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 17:56:59,041 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-06 17:56:59,041 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-06 17:56:59,041 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:56:59,047 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:56:59,047 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:56:59,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:56:59 BoogieIcfgContainer [2021-12-06 17:56:59,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:56:59,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:56:59,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:56:59,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:56:59,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:56:55" (1/3) ... [2021-12-06 17:56:59,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c7694c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:56:59, skipping insertion in model container [2021-12-06 17:56:59,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:56:56" (2/3) ... [2021-12-06 17:56:59,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c7694c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:56:59, skipping insertion in model container [2021-12-06 17:56:59,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:56:59" (3/3) ... [2021-12-06 17:56:59,055 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2021-12-06 17:56:59,059 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:56:59,059 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:56:59,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:56:59,099 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 [2021-12-06 17:56:59,099 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:56:59,113 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) [2021-12-06 17:56:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 17:56:59,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:59,120 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] [2021-12-06 17:56:59,121 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2021-12-06 17:56:59,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:59,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560519677] [2021-12-06 17:56:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:59,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:56:59,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:59,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560519677] [2021-12-06 17:56:59,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560519677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:56:59,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:56:59,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:56:59,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000462657] [2021-12-06 17:56:59,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:56:59,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:56:59,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:56:59,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:56:59,578 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) [2021-12-06 17:57:01,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:01,715 INFO L93 Difference]: Finished difference Result 406 states and 687 transitions. [2021-12-06 17:57:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:01,718 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 [2021-12-06 17:57:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:01,730 INFO L225 Difference]: With dead ends: 406 [2021-12-06 17:57:01,731 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 17:57:01,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:01,736 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:01,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 411 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:57:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 17:57:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 175. [2021-12-06 17:57:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.6091954022988506) internal successors, (280), 174 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 280 transitions. [2021-12-06 17:57:01,774 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 280 transitions. Word has length 47 [2021-12-06 17:57:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:01,775 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 280 transitions. [2021-12-06 17:57:01,775 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) [2021-12-06 17:57:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 280 transitions. [2021-12-06 17:57:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 17:57:01,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:01,777 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, 1] [2021-12-06 17:57:01,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:57:01,777 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829262, now seen corresponding path program 1 times [2021-12-06 17:57:01,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:01,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053160331] [2021-12-06 17:57:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:01,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:01,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:01,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053160331] [2021-12-06 17:57:01,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053160331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:01,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:01,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:01,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580795686] [2021-12-06 17:57:01,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:01,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:01,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:01,886 INFO L87 Difference]: Start difference. First operand 175 states and 280 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:03,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:04,084 INFO L93 Difference]: Finished difference Result 368 states and 587 transitions. [2021-12-06 17:57:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:04,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-12-06 17:57:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:04,086 INFO L225 Difference]: With dead ends: 368 [2021-12-06 17:57:04,086 INFO L226 Difference]: Without dead ends: 203 [2021-12-06 17:57:04,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:04,088 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 22 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:04,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 439 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-06 17:57:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2021-12-06 17:57:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6162162162162161) internal successors, (299), 185 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 299 transitions. [2021-12-06 17:57:04,099 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 299 transitions. Word has length 48 [2021-12-06 17:57:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:04,100 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 299 transitions. [2021-12-06 17:57:04,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 299 transitions. [2021-12-06 17:57:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:57:04,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:04,102 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, 1] [2021-12-06 17:57:04,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:57:04,103 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1875534592, now seen corresponding path program 1 times [2021-12-06 17:57:04,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:04,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719338190] [2021-12-06 17:57:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:04,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:04,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719338190] [2021-12-06 17:57:04,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719338190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:04,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:04,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:04,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348961502] [2021-12-06 17:57:04,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:04,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:04,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:04,221 INFO L87 Difference]: Start difference. First operand 186 states and 299 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) [2021-12-06 17:57:06,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:06,418 INFO L93 Difference]: Finished difference Result 368 states and 586 transitions. [2021-12-06 17:57:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:06,418 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 [2021-12-06 17:57:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:06,420 INFO L225 Difference]: With dead ends: 368 [2021-12-06 17:57:06,420 INFO L226 Difference]: Without dead ends: 203 [2021-12-06 17:57:06,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:06,422 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 24 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:06,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 441 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-06 17:57:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2021-12-06 17:57:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6108108108108108) internal successors, (298), 185 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 298 transitions. [2021-12-06 17:57:06,431 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 298 transitions. Word has length 61 [2021-12-06 17:57:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:06,431 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 298 transitions. [2021-12-06 17:57:06,431 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) [2021-12-06 17:57:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 298 transitions. [2021-12-06 17:57:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:57:06,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:06,434 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, 1] [2021-12-06 17:57:06,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:57:06,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:06,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:06,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1839351473, now seen corresponding path program 1 times [2021-12-06 17:57:06,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:06,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499311514] [2021-12-06 17:57:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:06,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:06,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499311514] [2021-12-06 17:57:06,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499311514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:06,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:06,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:06,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965927504] [2021-12-06 17:57:06,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:06,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:06,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:06,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:06,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:06,515 INFO L87 Difference]: Start difference. First operand 186 states and 298 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) [2021-12-06 17:57:08,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:08,714 INFO L93 Difference]: Finished difference Result 367 states and 584 transitions. [2021-12-06 17:57:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:08,715 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 [2021-12-06 17:57:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:08,716 INFO L225 Difference]: With dead ends: 367 [2021-12-06 17:57:08,716 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 17:57:08,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:08,718 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 28 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:08,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 17:57:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2021-12-06 17:57:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6054054054054054) internal successors, (297), 185 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 297 transitions. [2021-12-06 17:57:08,726 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 297 transitions. Word has length 62 [2021-12-06 17:57:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:08,726 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 297 transitions. [2021-12-06 17:57:08,726 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) [2021-12-06 17:57:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 297 transitions. [2021-12-06 17:57:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:57:08,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:08,728 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, 1] [2021-12-06 17:57:08,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:57:08,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1630821317, now seen corresponding path program 1 times [2021-12-06 17:57:08,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:08,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151560741] [2021-12-06 17:57:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:08,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:08,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:08,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151560741] [2021-12-06 17:57:08,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151560741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:08,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:08,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:08,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304552352] [2021-12-06 17:57:08,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:08,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:08,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:08,825 INFO L87 Difference]: Start difference. First operand 186 states and 297 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) [2021-12-06 17:57:10,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:11,121 INFO L93 Difference]: Finished difference Result 465 states and 739 transitions. [2021-12-06 17:57:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:11,122 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 [2021-12-06 17:57:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:11,124 INFO L225 Difference]: With dead ends: 465 [2021-12-06 17:57:11,124 INFO L226 Difference]: Without dead ends: 300 [2021-12-06 17:57:11,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:11,126 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 141 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:11,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 302 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-06 17:57:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 198. [2021-12-06 17:57:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5888324873096447) internal successors, (313), 197 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 313 transitions. [2021-12-06 17:57:11,137 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 313 transitions. Word has length 62 [2021-12-06 17:57:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:11,138 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 313 transitions. [2021-12-06 17:57:11,138 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) [2021-12-06 17:57:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 313 transitions. [2021-12-06 17:57:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:57:11,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:11,140 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, 1] [2021-12-06 17:57:11,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:57:11,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash 509961732, now seen corresponding path program 1 times [2021-12-06 17:57:11,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:11,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117076077] [2021-12-06 17:57:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:11,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:11,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117076077] [2021-12-06 17:57:11,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117076077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:11,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:11,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:11,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234380122] [2021-12-06 17:57:11,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:11,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:11,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:11,239 INFO L87 Difference]: Start difference. First operand 198 states and 313 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) [2021-12-06 17:57:13,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:13,448 INFO L93 Difference]: Finished difference Result 390 states and 615 transitions. [2021-12-06 17:57:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:13,449 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 [2021-12-06 17:57:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:13,450 INFO L225 Difference]: With dead ends: 390 [2021-12-06 17:57:13,450 INFO L226 Difference]: Without dead ends: 213 [2021-12-06 17:57:13,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:13,451 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 19 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:13,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 445 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-06 17:57:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 198. [2021-12-06 17:57:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.583756345177665) internal successors, (312), 197 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 312 transitions. [2021-12-06 17:57:13,457 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 312 transitions. Word has length 62 [2021-12-06 17:57:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:13,457 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 312 transitions. [2021-12-06 17:57:13,457 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) [2021-12-06 17:57:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 312 transitions. [2021-12-06 17:57:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:57:13,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:13,458 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, 1] [2021-12-06 17:57:13,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:57:13,458 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1144939844, now seen corresponding path program 1 times [2021-12-06 17:57:13,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:13,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27593245] [2021-12-06 17:57:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:13,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:13,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27593245] [2021-12-06 17:57:13,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27593245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:13,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:13,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:13,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468884470] [2021-12-06 17:57:13,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:13,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:13,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:13,528 INFO L87 Difference]: Start difference. First operand 198 states and 312 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) [2021-12-06 17:57:15,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:15,850 INFO L93 Difference]: Finished difference Result 477 states and 752 transitions. [2021-12-06 17:57:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:15,850 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 [2021-12-06 17:57:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:15,852 INFO L225 Difference]: With dead ends: 477 [2021-12-06 17:57:15,852 INFO L226 Difference]: Without dead ends: 300 [2021-12-06 17:57:15,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:15,853 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 135 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:15,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 302 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-06 17:57:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 203. [2021-12-06 17:57:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.5792079207920793) internal successors, (319), 202 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) [2021-12-06 17:57:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 319 transitions. [2021-12-06 17:57:15,862 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 319 transitions. Word has length 62 [2021-12-06 17:57:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:15,862 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 319 transitions. [2021-12-06 17:57:15,862 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) [2021-12-06 17:57:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 319 transitions. [2021-12-06 17:57:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:57:15,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:15,863 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, 1] [2021-12-06 17:57:15,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:57:15,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1652438455, now seen corresponding path program 1 times [2021-12-06 17:57:15,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023160134] [2021-12-06 17:57:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:15,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:15,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:15,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023160134] [2021-12-06 17:57:15,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023160134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:15,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:15,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:15,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262809788] [2021-12-06 17:57:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:15,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:15,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:15,939 INFO L87 Difference]: Start difference. First operand 203 states and 319 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) [2021-12-06 17:57:17,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:18,155 INFO L93 Difference]: Finished difference Result 398 states and 627 transitions. [2021-12-06 17:57:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:18,156 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 [2021-12-06 17:57:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:18,157 INFO L225 Difference]: With dead ends: 398 [2021-12-06 17:57:18,158 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 17:57:18,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:18,159 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 22 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:18,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 17:57:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 203. [2021-12-06 17:57:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.5742574257425743) internal successors, (318), 202 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 318 transitions. [2021-12-06 17:57:18,167 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 318 transitions. Word has length 63 [2021-12-06 17:57:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:18,167 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 318 transitions. [2021-12-06 17:57:18,167 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) [2021-12-06 17:57:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 318 transitions. [2021-12-06 17:57:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:57:18,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:18,168 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, 1] [2021-12-06 17:57:18,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:57:18,169 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -848424362, now seen corresponding path program 1 times [2021-12-06 17:57:18,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:18,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869806102] [2021-12-06 17:57:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:18,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:18,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869806102] [2021-12-06 17:57:18,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869806102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:18,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:18,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:18,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585142770] [2021-12-06 17:57:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:18,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:18,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:18,241 INFO L87 Difference]: Start difference. First operand 203 states and 318 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) [2021-12-06 17:57:20,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:20,430 INFO L93 Difference]: Finished difference Result 398 states and 626 transitions. [2021-12-06 17:57:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:20,431 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 [2021-12-06 17:57:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:20,432 INFO L225 Difference]: With dead ends: 398 [2021-12-06 17:57:20,432 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 17:57:20,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:20,433 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 20 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:20,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 17:57:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 203. [2021-12-06 17:57:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.5693069306930694) internal successors, (317), 202 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 317 transitions. [2021-12-06 17:57:20,438 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 317 transitions. Word has length 64 [2021-12-06 17:57:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:20,438 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 317 transitions. [2021-12-06 17:57:20,438 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) [2021-12-06 17:57:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 317 transitions. [2021-12-06 17:57:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:57:20,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:20,439 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, 1] [2021-12-06 17:57:20,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:57:20,439 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:20,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2026506290, now seen corresponding path program 1 times [2021-12-06 17:57:20,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:20,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946562595] [2021-12-06 17:57:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:20,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:20,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:20,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946562595] [2021-12-06 17:57:20,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946562595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:20,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:20,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:20,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913993633] [2021-12-06 17:57:20,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:20,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:20,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:20,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:20,518 INFO L87 Difference]: Start difference. First operand 203 states and 317 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:22,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:22,703 INFO L93 Difference]: Finished difference Result 388 states and 612 transitions. [2021-12-06 17:57:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:22,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 17:57:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:22,705 INFO L225 Difference]: With dead ends: 388 [2021-12-06 17:57:22,706 INFO L226 Difference]: Without dead ends: 206 [2021-12-06 17:57:22,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:57:22,707 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:22,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-06 17:57:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2021-12-06 17:57:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.5643564356435644) internal successors, (316), 202 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 316 transitions. [2021-12-06 17:57:22,712 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 316 transitions. Word has length 65 [2021-12-06 17:57:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:22,713 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 316 transitions. [2021-12-06 17:57:22,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 316 transitions. [2021-12-06 17:57:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:57:22,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:22,713 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, 1] [2021-12-06 17:57:22,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:57:22,714 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1546297802, now seen corresponding path program 1 times [2021-12-06 17:57:22,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:22,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78165731] [2021-12-06 17:57:22,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:22,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:22,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:22,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78165731] [2021-12-06 17:57:22,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78165731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:22,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:22,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:22,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923627469] [2021-12-06 17:57:22,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:22,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:22,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:22,781 INFO L87 Difference]: Start difference. First operand 203 states and 316 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:24,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:25,082 INFO L93 Difference]: Finished difference Result 482 states and 754 transitions. [2021-12-06 17:57:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:25,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 17:57:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:25,084 INFO L225 Difference]: With dead ends: 482 [2021-12-06 17:57:25,084 INFO L226 Difference]: Without dead ends: 298 [2021-12-06 17:57:25,084 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 [2021-12-06 17:57:25,085 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 109 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:25,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 312 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-06 17:57:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 228. [2021-12-06 17:57:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.6079295154185023) internal successors, (365), 227 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 365 transitions. [2021-12-06 17:57:25,090 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 365 transitions. Word has length 65 [2021-12-06 17:57:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:25,091 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 365 transitions. [2021-12-06 17:57:25,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 365 transitions. [2021-12-06 17:57:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 17:57:25,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:25,091 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-06 17:57:25,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:57:25,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash 632591508, now seen corresponding path program 1 times [2021-12-06 17:57:25,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:25,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472057208] [2021-12-06 17:57:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:25,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:25,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472057208] [2021-12-06 17:57:25,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472057208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:25,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:25,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:25,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735323719] [2021-12-06 17:57:25,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:25,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:25,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:25,178 INFO L87 Difference]: Start difference. First operand 228 states and 365 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) [2021-12-06 17:57:27,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:27,493 INFO L93 Difference]: Finished difference Result 544 states and 871 transitions. [2021-12-06 17:57:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:27,493 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 93 [2021-12-06 17:57:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:27,495 INFO L225 Difference]: With dead ends: 544 [2021-12-06 17:57:27,495 INFO L226 Difference]: Without dead ends: 337 [2021-12-06 17:57:27,495 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 [2021-12-06 17:57:27,496 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 117 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:27,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 314 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-06 17:57:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 260. [2021-12-06 17:57:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.6216216216216217) internal successors, (420), 259 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 420 transitions. [2021-12-06 17:57:27,502 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 420 transitions. Word has length 93 [2021-12-06 17:57:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:27,503 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 420 transitions. [2021-12-06 17:57:27,503 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) [2021-12-06 17:57:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 420 transitions. [2021-12-06 17:57:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 17:57:27,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:27,504 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-06 17:57:27,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:57:27,504 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:27,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1221146161, now seen corresponding path program 1 times [2021-12-06 17:57:27,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:27,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364960174] [2021-12-06 17:57:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:27,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:57:27,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:27,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364960174] [2021-12-06 17:57:27,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364960174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:27,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:27,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:27,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134770650] [2021-12-06 17:57:27,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:27,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:27,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:27,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:27,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:27,574 INFO L87 Difference]: Start difference. First operand 260 states and 420 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:29,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:29,901 INFO L93 Difference]: Finished difference Result 613 states and 986 transitions. [2021-12-06 17:57:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-12-06 17:57:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:29,903 INFO L225 Difference]: With dead ends: 613 [2021-12-06 17:57:29,903 INFO L226 Difference]: Without dead ends: 374 [2021-12-06 17:57:29,904 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 [2021-12-06 17:57:29,904 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:29,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 318 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-06 17:57:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 303. [2021-12-06 17:57:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.6357615894039734) internal successors, (494), 302 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 494 transitions. [2021-12-06 17:57:29,911 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 494 transitions. Word has length 105 [2021-12-06 17:57:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:29,912 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 494 transitions. [2021-12-06 17:57:29,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 494 transitions. [2021-12-06 17:57:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 17:57:29,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:29,913 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:57:29,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:57:29,913 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1500161074, now seen corresponding path program 1 times [2021-12-06 17:57:29,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:29,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300242296] [2021-12-06 17:57:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:29,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 17:57:29,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:29,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300242296] [2021-12-06 17:57:29,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300242296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:29,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:29,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:29,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346258783] [2021-12-06 17:57:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:29,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:29,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:29,979 INFO L87 Difference]: Start difference. First operand 303 states and 494 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) [2021-12-06 17:57:31,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:32,276 INFO L93 Difference]: Finished difference Result 695 states and 1129 transitions. [2021-12-06 17:57:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:32,277 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 106 [2021-12-06 17:57:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:32,279 INFO L225 Difference]: With dead ends: 695 [2021-12-06 17:57:32,279 INFO L226 Difference]: Without dead ends: 413 [2021-12-06 17:57:32,279 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 [2021-12-06 17:57:32,280 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 134 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:32,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 306 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-12-06 17:57:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 319. [2021-12-06 17:57:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.6226415094339623) internal successors, (516), 318 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 516 transitions. [2021-12-06 17:57:32,287 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 516 transitions. Word has length 106 [2021-12-06 17:57:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:32,287 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 516 transitions. [2021-12-06 17:57:32,287 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) [2021-12-06 17:57:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 516 transitions. [2021-12-06 17:57:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 17:57:32,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:32,288 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-06 17:57:32,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:57:32,288 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2144263610, now seen corresponding path program 1 times [2021-12-06 17:57:32,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:32,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003037691] [2021-12-06 17:57:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:32,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:57:32,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:32,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003037691] [2021-12-06 17:57:32,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003037691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:32,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:32,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:32,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689417742] [2021-12-06 17:57:32,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:32,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:32,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:32,361 INFO L87 Difference]: Start difference. First operand 319 states and 516 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2021-12-06 17:57:34,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:34,574 INFO L93 Difference]: Finished difference Result 659 states and 1070 transitions. [2021-12-06 17:57:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:34,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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 106 [2021-12-06 17:57:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:34,576 INFO L225 Difference]: With dead ends: 659 [2021-12-06 17:57:34,576 INFO L226 Difference]: Without dead ends: 361 [2021-12-06 17:57:34,576 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 [2021-12-06 17:57:34,577 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 33 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:34,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 465 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-12-06 17:57:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 341. [2021-12-06 17:57:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6205882352941177) internal successors, (551), 340 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 551 transitions. [2021-12-06 17:57:34,584 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 551 transitions. Word has length 106 [2021-12-06 17:57:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:34,584 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 551 transitions. [2021-12-06 17:57:34,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2021-12-06 17:57:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 551 transitions. [2021-12-06 17:57:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 17:57:34,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:34,585 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-12-06 17:57:34,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:57:34,585 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:34,586 INFO L85 PathProgramCache]: Analyzing trace with hash 240959469, now seen corresponding path program 1 times [2021-12-06 17:57:34,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:34,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949081236] [2021-12-06 17:57:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:34,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 17:57:34,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:34,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949081236] [2021-12-06 17:57:34,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949081236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:34,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:34,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:34,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966590140] [2021-12-06 17:57:34,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:34,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:34,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:34,653 INFO L87 Difference]: Start difference. First operand 341 states and 551 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:36,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:36,948 INFO L93 Difference]: Finished difference Result 730 states and 1170 transitions. [2021-12-06 17:57:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:36,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 120 [2021-12-06 17:57:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:36,950 INFO L225 Difference]: With dead ends: 730 [2021-12-06 17:57:36,950 INFO L226 Difference]: Without dead ends: 410 [2021-12-06 17:57:36,951 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 [2021-12-06 17:57:36,951 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 139 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:36,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-06 17:57:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2021-12-06 17:57:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6029411764705883) internal successors, (545), 340 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 545 transitions. [2021-12-06 17:57:36,958 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 545 transitions. Word has length 120 [2021-12-06 17:57:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:36,958 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 545 transitions. [2021-12-06 17:57:36,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 545 transitions. [2021-12-06 17:57:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 17:57:36,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:36,960 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 17:57:36,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:57:36,960 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1985043260, now seen corresponding path program 1 times [2021-12-06 17:57:36,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:36,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59184901] [2021-12-06 17:57:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:36,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 17:57:37,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:37,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59184901] [2021-12-06 17:57:37,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59184901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:37,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:37,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:37,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131281688] [2021-12-06 17:57:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:37,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:37,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:37,026 INFO L87 Difference]: Start difference. First operand 341 states and 545 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:39,033 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:39,229 INFO L93 Difference]: Finished difference Result 679 states and 1090 transitions. [2021-12-06 17:57:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:39,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 120 [2021-12-06 17:57:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:39,230 INFO L225 Difference]: With dead ends: 679 [2021-12-06 17:57:39,230 INFO L226 Difference]: Without dead ends: 359 [2021-12-06 17:57:39,231 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 [2021-12-06 17:57:39,231 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 35 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:39,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-06 17:57:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2021-12-06 17:57:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6) internal successors, (544), 340 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 544 transitions. [2021-12-06 17:57:39,238 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 544 transitions. Word has length 120 [2021-12-06 17:57:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:39,238 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 544 transitions. [2021-12-06 17:57:39,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 544 transitions. [2021-12-06 17:57:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 17:57:39,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:39,239 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-12-06 17:57:39,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:57:39,239 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1586861309, now seen corresponding path program 1 times [2021-12-06 17:57:39,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:39,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769792655] [2021-12-06 17:57:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:39,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 17:57:39,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769792655] [2021-12-06 17:57:39,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769792655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:39,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:39,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:39,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125846196] [2021-12-06 17:57:39,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:39,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:39,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:39,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:39,312 INFO L87 Difference]: Start difference. First operand 341 states and 544 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:41,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:41,607 INFO L93 Difference]: Finished difference Result 730 states and 1156 transitions. [2021-12-06 17:57:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:41,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 121 [2021-12-06 17:57:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:41,609 INFO L225 Difference]: With dead ends: 730 [2021-12-06 17:57:41,609 INFO L226 Difference]: Without dead ends: 410 [2021-12-06 17:57:41,610 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 [2021-12-06 17:57:41,610 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 136 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:41,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 318 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-06 17:57:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2021-12-06 17:57:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5823529411764705) internal successors, (538), 340 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 538 transitions. [2021-12-06 17:57:41,617 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 538 transitions. Word has length 121 [2021-12-06 17:57:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:41,617 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 538 transitions. [2021-12-06 17:57:41,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 538 transitions. [2021-12-06 17:57:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 17:57:41,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:41,618 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-12-06 17:57:41,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:57:41,618 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1735358010, now seen corresponding path program 1 times [2021-12-06 17:57:41,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:41,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370841310] [2021-12-06 17:57:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:41,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 17:57:41,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:41,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370841310] [2021-12-06 17:57:41,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370841310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:41,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:41,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:41,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855790748] [2021-12-06 17:57:41,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:41,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:41,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:41,687 INFO L87 Difference]: Start difference. First operand 341 states and 538 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2021-12-06 17:57:43,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:43,887 INFO L93 Difference]: Finished difference Result 679 states and 1076 transitions. [2021-12-06 17:57:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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 122 [2021-12-06 17:57:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:43,889 INFO L225 Difference]: With dead ends: 679 [2021-12-06 17:57:43,889 INFO L226 Difference]: Without dead ends: 359 [2021-12-06 17:57:43,889 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 [2021-12-06 17:57:43,890 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 37 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:43,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:57:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-06 17:57:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2021-12-06 17:57:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5794117647058823) internal successors, (537), 340 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 537 transitions. [2021-12-06 17:57:43,896 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 537 transitions. Word has length 122 [2021-12-06 17:57:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:43,896 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 537 transitions. [2021-12-06 17:57:43,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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) [2021-12-06 17:57:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 537 transitions. [2021-12-06 17:57:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 17:57:43,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:43,897 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1] [2021-12-06 17:57:43,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:57:43,897 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:43,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2093537762, now seen corresponding path program 1 times [2021-12-06 17:57:43,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:43,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539144281] [2021-12-06 17:57:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:43,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 17:57:43,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:43,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539144281] [2021-12-06 17:57:43,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539144281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:43,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:43,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:43,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142730813] [2021-12-06 17:57:43,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:43,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:43,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:43,966 INFO L87 Difference]: Start difference. First operand 341 states and 537 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2021-12-06 17:57:45,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:46,273 INFO L93 Difference]: Finished difference Result 730 states and 1142 transitions. [2021-12-06 17:57:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:46,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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 123 [2021-12-06 17:57:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:46,275 INFO L225 Difference]: With dead ends: 730 [2021-12-06 17:57:46,275 INFO L226 Difference]: Without dead ends: 410 [2021-12-06 17:57:46,276 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 [2021-12-06 17:57:46,277 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 133 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:46,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-06 17:57:46,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2021-12-06 17:57:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.561764705882353) internal successors, (531), 340 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 531 transitions. [2021-12-06 17:57:46,286 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 531 transitions. Word has length 123 [2021-12-06 17:57:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:46,287 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 531 transitions. [2021-12-06 17:57:46,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2021-12-06 17:57:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 531 transitions. [2021-12-06 17:57:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 17:57:46,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:46,288 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] [2021-12-06 17:57:46,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 17:57:46,289 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:46,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1960687741, now seen corresponding path program 1 times [2021-12-06 17:57:46,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:46,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234687445] [2021-12-06 17:57:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:46,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 17:57:46,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234687445] [2021-12-06 17:57:46,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234687445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:46,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:46,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:57:46,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509792073] [2021-12-06 17:57:46,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:46,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:57:46,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:57:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:57:46,374 INFO L87 Difference]: Start difference. First operand 341 states and 531 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) [2021-12-06 17:57:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:46,395 INFO L93 Difference]: Finished difference Result 975 states and 1537 transitions. [2021-12-06 17:57:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:57:46,396 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 [2021-12-06 17:57:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:46,399 INFO L225 Difference]: With dead ends: 975 [2021-12-06 17:57:46,399 INFO L226 Difference]: Without dead ends: 655 [2021-12-06 17:57:46,399 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 [2021-12-06 17:57:46,400 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 134 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:46,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 550 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:57:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-12-06 17:57:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2021-12-06 17:57:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.5688073394495412) internal successors, (1026), 654 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1026 transitions. [2021-12-06 17:57:46,412 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1026 transitions. Word has length 127 [2021-12-06 17:57:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:46,412 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1026 transitions. [2021-12-06 17:57:46,412 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) [2021-12-06 17:57:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1026 transitions. [2021-12-06 17:57:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 17:57:46,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:46,413 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] [2021-12-06 17:57:46,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 17:57:46,414 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:46,414 INFO L85 PathProgramCache]: Analyzing trace with hash -88700101, now seen corresponding path program 1 times [2021-12-06 17:57:46,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:46,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279841287] [2021-12-06 17:57:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:46,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:57:46,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279841287] [2021-12-06 17:57:46,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279841287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:46,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:46,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:57:46,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650766382] [2021-12-06 17:57:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:46,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:57:46,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:57:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:57:46,481 INFO L87 Difference]: Start difference. First operand 655 states and 1026 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2021-12-06 17:57:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:46,514 INFO L93 Difference]: Finished difference Result 1562 states and 2458 transitions. [2021-12-06 17:57:46,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:57:46,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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 127 [2021-12-06 17:57:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:46,518 INFO L225 Difference]: With dead ends: 1562 [2021-12-06 17:57:46,518 INFO L226 Difference]: Without dead ends: 928 [2021-12-06 17:57:46,519 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 [2021-12-06 17:57:46,520 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:46,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 428 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:57:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-12-06 17:57:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2021-12-06 17:57:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.5663430420711975) internal successors, (1452), 927 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1452 transitions. [2021-12-06 17:57:46,537 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1452 transitions. Word has length 127 [2021-12-06 17:57:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:46,537 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1452 transitions. [2021-12-06 17:57:46,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2021-12-06 17:57:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1452 transitions. [2021-12-06 17:57:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 17:57:46,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:46,539 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, 1] [2021-12-06 17:57:46,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 17:57:46,539 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash 859220644, now seen corresponding path program 1 times [2021-12-06 17:57:46,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:46,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836852663] [2021-12-06 17:57:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:46,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 17:57:46,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836852663] [2021-12-06 17:57:46,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836852663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:46,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:46,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:57:46,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619473736] [2021-12-06 17:57:46,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:46,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:57:46,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:57:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:57:46,599 INFO L87 Difference]: Start difference. First operand 928 states and 1452 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-12-06 17:57:46,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:46,622 INFO L93 Difference]: Finished difference Result 1862 states and 2916 transitions. [2021-12-06 17:57:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:57:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 128 [2021-12-06 17:57:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:46,626 INFO L225 Difference]: With dead ends: 1862 [2021-12-06 17:57:46,626 INFO L226 Difference]: Without dead ends: 955 [2021-12-06 17:57:46,627 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 [2021-12-06 17:57:46,628 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:46,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 400 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:57:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-12-06 17:57:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 955. [2021-12-06 17:57:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.5587002096436058) internal successors, (1487), 954 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1487 transitions. [2021-12-06 17:57:46,644 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1487 transitions. Word has length 128 [2021-12-06 17:57:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:46,645 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1487 transitions. [2021-12-06 17:57:46,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-12-06 17:57:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1487 transitions. [2021-12-06 17:57:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 17:57:46,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:46,646 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, 1] [2021-12-06 17:57:46,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 17:57:46,647 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1282639834, now seen corresponding path program 1 times [2021-12-06 17:57:46,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:46,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360126888] [2021-12-06 17:57:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:46,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 17:57:46,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:46,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360126888] [2021-12-06 17:57:46,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360126888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:46,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:46,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:57:46,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023322567] [2021-12-06 17:57:46,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:46,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:57:46,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:46,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:57:46,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:57:46,712 INFO L87 Difference]: Start difference. First operand 955 states and 1487 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-12-06 17:57:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:46,731 INFO L93 Difference]: Finished difference Result 1891 states and 2952 transitions. [2021-12-06 17:57:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:57:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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 128 [2021-12-06 17:57:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:46,735 INFO L225 Difference]: With dead ends: 1891 [2021-12-06 17:57:46,735 INFO L226 Difference]: Without dead ends: 957 [2021-12-06 17:57:46,736 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 [2021-12-06 17:57:46,736 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:46,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 379 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:57:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-12-06 17:57:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2021-12-06 17:57:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.5575313807531381) internal successors, (1489), 956 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1489 transitions. [2021-12-06 17:57:46,753 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1489 transitions. Word has length 128 [2021-12-06 17:57:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:46,753 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1489 transitions. [2021-12-06 17:57:46,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-12-06 17:57:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1489 transitions. [2021-12-06 17:57:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-06 17:57:46,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:46,755 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, 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] [2021-12-06 17:57:46,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 17:57:46,755 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1581011726, now seen corresponding path program 1 times [2021-12-06 17:57:46,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559745644] [2021-12-06 17:57:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:46,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 211 proven. 34 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 17:57:46,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:46,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559745644] [2021-12-06 17:57:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559745644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:46,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096769033] [2021-12-06 17:57:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:46,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:46,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:46,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:46,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:57:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:47,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:57:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:47,359 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 17:57:47,360 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 17:57:47,408 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:57:47,409 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 [2021-12-06 17:57:47,466 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 17:57:47,466 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 17:57:47,510 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 [2021-12-06 17:57:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 212 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 17:57:47,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:57:47,715 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 19 treesize of output 17 [2021-12-06 17:57:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 17:57:47,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096769033] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:47,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:57:47,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2021-12-06 17:57:47,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22615758] [2021-12-06 17:57:47,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:47,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:47,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:47,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:47,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:57:47,765 INFO L87 Difference]: Start difference. First operand 957 states and 1489 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) [2021-12-06 17:57:49,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:50,073 INFO L93 Difference]: Finished difference Result 2165 states and 3350 transitions. [2021-12-06 17:57:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:50,073 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 191 [2021-12-06 17:57:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:50,078 INFO L225 Difference]: With dead ends: 2165 [2021-12-06 17:57:50,078 INFO L226 Difference]: Without dead ends: 1231 [2021-12-06 17:57:50,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:57:50,080 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 96 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:50,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 421 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-12-06 17:57:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1023. [2021-12-06 17:57:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.5459882583170255) internal successors, (1580), 1022 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1580 transitions. [2021-12-06 17:57:50,105 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1580 transitions. Word has length 191 [2021-12-06 17:57:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:50,105 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1580 transitions. [2021-12-06 17:57:50,106 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) [2021-12-06 17:57:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1580 transitions. [2021-12-06 17:57:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-06 17:57:50,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:50,109 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 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, 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] [2021-12-06 17:57:50,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:57:50,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 17:57:50,310 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash 893611286, now seen corresponding path program 1 times [2021-12-06 17:57:50,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:50,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272015814] [2021-12-06 17:57:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:50,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 17:57:50,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272015814] [2021-12-06 17:57:50,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272015814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:50,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:50,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:50,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801337090] [2021-12-06 17:57:50,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:50,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:50,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:50,397 INFO L87 Difference]: Start difference. First operand 1023 states and 1580 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) [2021-12-06 17:57:52,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:52,724 INFO L93 Difference]: Finished difference Result 2116 states and 3251 transitions. [2021-12-06 17:57:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:52,724 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 192 [2021-12-06 17:57:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:52,728 INFO L225 Difference]: With dead ends: 2116 [2021-12-06 17:57:52,728 INFO L226 Difference]: Without dead ends: 1116 [2021-12-06 17:57:52,729 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 [2021-12-06 17:57:52,730 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 87 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:52,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 598 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-12-06 17:57:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1023. [2021-12-06 17:57:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.544031311154599) internal successors, (1578), 1022 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1578 transitions. [2021-12-06 17:57:52,746 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1578 transitions. Word has length 192 [2021-12-06 17:57:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:52,746 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1578 transitions. [2021-12-06 17:57:52,746 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) [2021-12-06 17:57:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1578 transitions. [2021-12-06 17:57:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-06 17:57:52,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:52,748 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 3, 3, 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, 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] [2021-12-06 17:57:52,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 17:57:52,749 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1597975272, now seen corresponding path program 1 times [2021-12-06 17:57:52,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:52,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846481492] [2021-12-06 17:57:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:52,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:57:52,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846481492] [2021-12-06 17:57:52,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846481492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:52,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:52,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:52,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451869225] [2021-12-06 17:57:52,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:52,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:52,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:52,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:52,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:52,837 INFO L87 Difference]: Start difference. First operand 1023 states and 1578 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) [2021-12-06 17:57:54,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:55,145 INFO L93 Difference]: Finished difference Result 2289 states and 3520 transitions. [2021-12-06 17:57:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:55,145 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 205 [2021-12-06 17:57:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:55,150 INFO L225 Difference]: With dead ends: 2289 [2021-12-06 17:57:55,150 INFO L226 Difference]: Without dead ends: 1289 [2021-12-06 17:57:55,151 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 [2021-12-06 17:57:55,152 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 89 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:55,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 611 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 266 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-12-06 17:57:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1023. [2021-12-06 17:57:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.544031311154599) internal successors, (1578), 1022 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1578 transitions. [2021-12-06 17:57:55,169 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1578 transitions. Word has length 205 [2021-12-06 17:57:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:55,169 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1578 transitions. [2021-12-06 17:57:55,169 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) [2021-12-06 17:57:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1578 transitions. [2021-12-06 17:57:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-06 17:57:55,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:55,171 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 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, 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] [2021-12-06 17:57:55,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 17:57:55,172 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1129262156, now seen corresponding path program 1 times [2021-12-06 17:57:55,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:55,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948375485] [2021-12-06 17:57:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:55,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:57:55,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:55,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948375485] [2021-12-06 17:57:55,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948375485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:55,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:55,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:57:55,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153362678] [2021-12-06 17:57:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:55,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:55,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:57:55,289 INFO L87 Difference]: Start difference. First operand 1023 states and 1578 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) [2021-12-06 17:57:57,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:57:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:57,590 INFO L93 Difference]: Finished difference Result 2276 states and 3500 transitions. [2021-12-06 17:57:57,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:57:57,591 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 206 [2021-12-06 17:57:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:57,596 INFO L225 Difference]: With dead ends: 2276 [2021-12-06 17:57:57,596 INFO L226 Difference]: Without dead ends: 1276 [2021-12-06 17:57:57,597 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 [2021-12-06 17:57:57,597 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 81 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:57,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 601 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:57:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-12-06 17:57:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1092. [2021-12-06 17:57:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.537121906507791) internal successors, (1677), 1091 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1677 transitions. [2021-12-06 17:57:57,614 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1677 transitions. Word has length 206 [2021-12-06 17:57:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:57,615 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1677 transitions. [2021-12-06 17:57:57,615 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) [2021-12-06 17:57:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1677 transitions. [2021-12-06 17:57:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-06 17:57:57,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:57,621 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 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, 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] [2021-12-06 17:57:57,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 17:57:57,621 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1610996986, now seen corresponding path program 1 times [2021-12-06 17:57:57,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:57,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410901159] [2021-12-06 17:57:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:57,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 241 proven. 14 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 17:57:57,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410901159] [2021-12-06 17:57:57,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410901159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707992497] [2021-12-06 17:57:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:57,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:57,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:57,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:57,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:57:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:58,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:57:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:58,155 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 31 treesize of output 19 [2021-12-06 17:57:58,170 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-06 17:57:58,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-06 17:57:58,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2021-12-06 17:57:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2021-12-06 17:57:58,312 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 17 treesize of output 13 [2021-12-06 17:57:58,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-06 17:57:58,340 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 7 treesize of output 3 [2021-12-06 17:57:58,374 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 [2021-12-06 17:57:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-06 17:57:58,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:57:58,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707992497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:58,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:57:58,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-06 17:57:58,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432258714] [2021-12-06 17:57:58,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:58,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:57:58,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:58,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:57:58,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:57:58,457 INFO L87 Difference]: Start difference. First operand 1092 states and 1677 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) [2021-12-06 17:58:00,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:00,763 INFO L93 Difference]: Finished difference Result 2385 states and 3658 transitions. [2021-12-06 17:58:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:00,764 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 207 [2021-12-06 17:58:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:00,769 INFO L225 Difference]: With dead ends: 2385 [2021-12-06 17:58:00,769 INFO L226 Difference]: Without dead ends: 1316 [2021-12-06 17:58:00,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:58:00,770 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 90 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:00,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 611 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-12-06 17:58:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1092. [2021-12-06 17:58:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.537121906507791) internal successors, (1677), 1091 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1677 transitions. [2021-12-06 17:58:00,793 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1677 transitions. Word has length 207 [2021-12-06 17:58:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:00,793 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1677 transitions. [2021-12-06 17:58:00,793 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) [2021-12-06 17:58:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1677 transitions. [2021-12-06 17:58:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 17:58:00,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:00,795 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 3, 3, 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, 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] [2021-12-06 17:58:00,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:58:00,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:00,996 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:00,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1128334472, now seen corresponding path program 1 times [2021-12-06 17:58:00,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:00,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876994115] [2021-12-06 17:58:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:00,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:58:01,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:01,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876994115] [2021-12-06 17:58:01,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876994115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:01,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:01,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:01,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211643061] [2021-12-06 17:58:01,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:01,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:01,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:01,123 INFO L87 Difference]: Start difference. First operand 1092 states and 1677 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) [2021-12-06 17:58:03,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:03,448 INFO L93 Difference]: Finished difference Result 2486 states and 3801 transitions. [2021-12-06 17:58:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:03,448 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 208 [2021-12-06 17:58:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:03,453 INFO L225 Difference]: With dead ends: 2486 [2021-12-06 17:58:03,454 INFO L226 Difference]: Without dead ends: 1417 [2021-12-06 17:58:03,454 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 [2021-12-06 17:58:03,455 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 119 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:03,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 343 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-12-06 17:58:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1149. [2021-12-06 17:58:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.5130662020905923) internal successors, (1737), 1148 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1737 transitions. [2021-12-06 17:58:03,490 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1737 transitions. Word has length 208 [2021-12-06 17:58:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:03,491 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1737 transitions. [2021-12-06 17:58:03,491 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) [2021-12-06 17:58:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1737 transitions. [2021-12-06 17:58:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 17:58:03,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:03,493 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 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, 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] [2021-12-06 17:58:03,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 17:58:03,493 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash -41878665, now seen corresponding path program 1 times [2021-12-06 17:58:03,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:03,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960234711] [2021-12-06 17:58:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:03,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:58:03,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:03,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960234711] [2021-12-06 17:58:03,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960234711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:03,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:03,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:03,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012299473] [2021-12-06 17:58:03,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:03,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:03,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:03,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:03,621 INFO L87 Difference]: Start difference. First operand 1149 states and 1737 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) [2021-12-06 17:58:05,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:05,898 INFO L93 Difference]: Finished difference Result 2348 states and 3539 transitions. [2021-12-06 17:58:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:05,898 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 208 [2021-12-06 17:58:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:05,903 INFO L225 Difference]: With dead ends: 2348 [2021-12-06 17:58:05,903 INFO L226 Difference]: Without dead ends: 1222 [2021-12-06 17:58:05,904 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 [2021-12-06 17:58:05,904 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 87 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:05,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 582 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-12-06 17:58:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1149. [2021-12-06 17:58:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.5113240418118468) internal successors, (1735), 1148 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1735 transitions. [2021-12-06 17:58:05,934 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1735 transitions. Word has length 208 [2021-12-06 17:58:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:05,935 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1735 transitions. [2021-12-06 17:58:05,935 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) [2021-12-06 17:58:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1735 transitions. [2021-12-06 17:58:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-06 17:58:05,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:05,936 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 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, 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] [2021-12-06 17:58:05,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 17:58:05,937 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1406253003, now seen corresponding path program 1 times [2021-12-06 17:58:05,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:05,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646807980] [2021-12-06 17:58:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:05,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:58:06,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646807980] [2021-12-06 17:58:06,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646807980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:06,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:06,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:06,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313633245] [2021-12-06 17:58:06,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:06,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:06,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:06,024 INFO L87 Difference]: Start difference. First operand 1149 states and 1735 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) [2021-12-06 17:58:08,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:08,312 INFO L93 Difference]: Finished difference Result 2348 states and 3535 transitions. [2021-12-06 17:58:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:08,313 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 209 [2021-12-06 17:58:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:08,317 INFO L225 Difference]: With dead ends: 2348 [2021-12-06 17:58:08,317 INFO L226 Difference]: Without dead ends: 1222 [2021-12-06 17:58:08,318 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 [2021-12-06 17:58:08,319 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 80 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:08,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 580 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-12-06 17:58:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1149. [2021-12-06 17:58:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.509581881533101) internal successors, (1733), 1148 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1733 transitions. [2021-12-06 17:58:08,337 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1733 transitions. Word has length 209 [2021-12-06 17:58:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:08,337 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1733 transitions. [2021-12-06 17:58:08,338 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) [2021-12-06 17:58:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1733 transitions. [2021-12-06 17:58:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 17:58:08,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:08,339 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, 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] [2021-12-06 17:58:08,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 17:58:08,339 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash 266712989, now seen corresponding path program 1 times [2021-12-06 17:58:08,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:08,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515129722] [2021-12-06 17:58:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:08,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:58:08,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:08,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515129722] [2021-12-06 17:58:08,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515129722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:08,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:08,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:08,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519114303] [2021-12-06 17:58:08,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:08,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:08,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:08,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:08,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:08,427 INFO L87 Difference]: Start difference. First operand 1149 states and 1733 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) [2021-12-06 17:58:10,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:10,713 INFO L93 Difference]: Finished difference Result 2341 states and 3523 transitions. [2021-12-06 17:58:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:10,714 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 210 [2021-12-06 17:58:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:10,718 INFO L225 Difference]: With dead ends: 2341 [2021-12-06 17:58:10,718 INFO L226 Difference]: Without dead ends: 1215 [2021-12-06 17:58:10,719 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 [2021-12-06 17:58:10,719 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 76 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:10,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 574 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-12-06 17:58:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1149. [2021-12-06 17:58:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.5078397212543555) internal successors, (1731), 1148 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1731 transitions. [2021-12-06 17:58:10,736 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1731 transitions. Word has length 210 [2021-12-06 17:58:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:10,737 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1731 transitions. [2021-12-06 17:58:10,737 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) [2021-12-06 17:58:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1731 transitions. [2021-12-06 17:58:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-06 17:58:10,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:10,738 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 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, 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] [2021-12-06 17:58:10,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 17:58:10,739 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash 166579950, now seen corresponding path program 1 times [2021-12-06 17:58:10,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:10,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004666312] [2021-12-06 17:58:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:10,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:10,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004666312] [2021-12-06 17:58:10,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004666312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:10,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:10,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:10,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68183938] [2021-12-06 17:58:10,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:10,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:10,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:10,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:10,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:10,824 INFO L87 Difference]: Start difference. First operand 1149 states and 1731 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 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) [2021-12-06 17:58:12,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:13,115 INFO L93 Difference]: Finished difference Result 2341 states and 3519 transitions. [2021-12-06 17:58:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:13,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 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 214 [2021-12-06 17:58:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:13,120 INFO L225 Difference]: With dead ends: 2341 [2021-12-06 17:58:13,120 INFO L226 Difference]: Without dead ends: 1215 [2021-12-06 17:58:13,121 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 [2021-12-06 17:58:13,121 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 72 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:13,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 572 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-12-06 17:58:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1149. [2021-12-06 17:58:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.5060975609756098) internal successors, (1729), 1148 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1729 transitions. [2021-12-06 17:58:13,138 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1729 transitions. Word has length 214 [2021-12-06 17:58:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:13,139 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1729 transitions. [2021-12-06 17:58:13,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 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) [2021-12-06 17:58:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1729 transitions. [2021-12-06 17:58:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 17:58:13,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:13,140 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 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] [2021-12-06 17:58:13,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 17:58:13,141 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1870434490, now seen corresponding path program 1 times [2021-12-06 17:58:13,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561886869] [2021-12-06 17:58:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:13,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:13,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:13,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561886869] [2021-12-06 17:58:13,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561886869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:13,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:13,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:13,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341194478] [2021-12-06 17:58:13,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:13,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:13,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:13,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:13,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:13,230 INFO L87 Difference]: Start difference. First operand 1149 states and 1729 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) [2021-12-06 17:58:15,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:15,484 INFO L93 Difference]: Finished difference Result 2333 states and 3505 transitions. [2021-12-06 17:58:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:15,490 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 215 [2021-12-06 17:58:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:15,494 INFO L225 Difference]: With dead ends: 2333 [2021-12-06 17:58:15,494 INFO L226 Difference]: Without dead ends: 1207 [2021-12-06 17:58:15,495 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 [2021-12-06 17:58:15,495 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 66 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:15,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 564 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-12-06 17:58:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1149. [2021-12-06 17:58:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.504355400696864) internal successors, (1727), 1148 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1727 transitions. [2021-12-06 17:58:15,513 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1727 transitions. Word has length 215 [2021-12-06 17:58:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:15,513 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1727 transitions. [2021-12-06 17:58:15,513 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) [2021-12-06 17:58:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1727 transitions. [2021-12-06 17:58:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-06 17:58:15,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:15,515 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, 3, 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] [2021-12-06 17:58:15,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 17:58:15,515 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1365737855, now seen corresponding path program 1 times [2021-12-06 17:58:15,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:15,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124554498] [2021-12-06 17:58:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:15,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:15,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124554498] [2021-12-06 17:58:15,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124554498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:15,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:15,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:15,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995138838] [2021-12-06 17:58:15,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:15,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:15,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:15,603 INFO L87 Difference]: Start difference. First operand 1149 states and 1727 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) [2021-12-06 17:58:17,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:17,869 INFO L93 Difference]: Finished difference Result 2333 states and 3501 transitions. [2021-12-06 17:58:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:17,869 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 217 [2021-12-06 17:58:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:17,874 INFO L225 Difference]: With dead ends: 2333 [2021-12-06 17:58:17,874 INFO L226 Difference]: Without dead ends: 1207 [2021-12-06 17:58:17,875 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 [2021-12-06 17:58:17,875 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 62 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:17,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 562 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-12-06 17:58:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1149. [2021-12-06 17:58:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.5026132404181185) internal successors, (1725), 1148 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1725 transitions. [2021-12-06 17:58:17,893 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1725 transitions. Word has length 217 [2021-12-06 17:58:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:17,893 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1725 transitions. [2021-12-06 17:58:17,893 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) [2021-12-06 17:58:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1725 transitions. [2021-12-06 17:58:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 17:58:17,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:17,895 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, 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] [2021-12-06 17:58:17,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 17:58:17,895 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:17,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1697536105, now seen corresponding path program 1 times [2021-12-06 17:58:17,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:17,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995501810] [2021-12-06 17:58:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:17,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:17,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995501810] [2021-12-06 17:58:17,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995501810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:17,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:17,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098939741] [2021-12-06 17:58:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:17,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:17,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:17,995 INFO L87 Difference]: Start difference. First operand 1149 states and 1725 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) [2021-12-06 17:58:20,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:20,242 INFO L93 Difference]: Finished difference Result 2317 states and 3471 transitions. [2021-12-06 17:58:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:20,243 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 218 [2021-12-06 17:58:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:20,245 INFO L225 Difference]: With dead ends: 2317 [2021-12-06 17:58:20,245 INFO L226 Difference]: Without dead ends: 1191 [2021-12-06 17:58:20,246 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 [2021-12-06 17:58:20,246 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 51 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:20,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 552 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-12-06 17:58:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1149. [2021-12-06 17:58:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.5008710801393728) internal successors, (1723), 1148 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1723 transitions. [2021-12-06 17:58:20,264 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1723 transitions. Word has length 218 [2021-12-06 17:58:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:20,264 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1723 transitions. [2021-12-06 17:58:20,264 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) [2021-12-06 17:58:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1723 transitions. [2021-12-06 17:58:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 17:58:20,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:20,266 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, 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] [2021-12-06 17:58:20,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 17:58:20,266 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1226059139, now seen corresponding path program 1 times [2021-12-06 17:58:20,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:20,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930645896] [2021-12-06 17:58:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:20,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:58:20,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:20,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930645896] [2021-12-06 17:58:20,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930645896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:20,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:20,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:20,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820184859] [2021-12-06 17:58:20,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:20,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:20,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:20,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:20,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:20,362 INFO L87 Difference]: Start difference. First operand 1149 states and 1723 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) [2021-12-06 17:58:22,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:22,608 INFO L93 Difference]: Finished difference Result 2317 states and 3467 transitions. [2021-12-06 17:58:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:22,609 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 218 [2021-12-06 17:58:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:22,611 INFO L225 Difference]: With dead ends: 2317 [2021-12-06 17:58:22,611 INFO L226 Difference]: Without dead ends: 1191 [2021-12-06 17:58:22,612 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 [2021-12-06 17:58:22,612 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 49 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:22,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 550 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-12-06 17:58:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1149. [2021-12-06 17:58:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.4991289198606272) internal successors, (1721), 1148 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1721 transitions. [2021-12-06 17:58:22,629 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1721 transitions. Word has length 218 [2021-12-06 17:58:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:22,629 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1721 transitions. [2021-12-06 17:58:22,630 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) [2021-12-06 17:58:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1721 transitions. [2021-12-06 17:58:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 17:58:22,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:22,631 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, 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] [2021-12-06 17:58:22,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 17:58:22,632 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash 306712821, now seen corresponding path program 1 times [2021-12-06 17:58:22,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:22,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886428891] [2021-12-06 17:58:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:22,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:58:22,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:22,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886428891] [2021-12-06 17:58:22,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886428891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:22,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:22,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:22,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684695900] [2021-12-06 17:58:22,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:22,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:22,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:22,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:22,729 INFO L87 Difference]: Start difference. First operand 1149 states and 1721 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) [2021-12-06 17:58:24,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:24,957 INFO L93 Difference]: Finished difference Result 2313 states and 3459 transitions. [2021-12-06 17:58:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:24,957 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 219 [2021-12-06 17:58:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:24,958 INFO L225 Difference]: With dead ends: 2313 [2021-12-06 17:58:24,958 INFO L226 Difference]: Without dead ends: 1187 [2021-12-06 17:58:24,961 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 [2021-12-06 17:58:24,961 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 46 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:24,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 546 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-12-06 17:58:24,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1149. [2021-12-06 17:58:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.4973867595818815) internal successors, (1719), 1148 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1719 transitions. [2021-12-06 17:58:24,981 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1719 transitions. Word has length 219 [2021-12-06 17:58:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:24,981 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1719 transitions. [2021-12-06 17:58:24,981 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) [2021-12-06 17:58:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1719 transitions. [2021-12-06 17:58:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-06 17:58:24,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:24,983 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, 3, 3, 3, 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] [2021-12-06 17:58:24,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 17:58:24,983 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash -331325385, now seen corresponding path program 1 times [2021-12-06 17:58:24,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:24,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492378857] [2021-12-06 17:58:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:24,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:25,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:25,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492378857] [2021-12-06 17:58:25,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492378857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:25,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:25,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:25,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841528345] [2021-12-06 17:58:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:25,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:25,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:25,114 INFO L87 Difference]: Start difference. First operand 1149 states and 1719 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) [2021-12-06 17:58:27,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:27,453 INFO L93 Difference]: Finished difference Result 2600 states and 3879 transitions. [2021-12-06 17:58:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:27,453 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 220 [2021-12-06 17:58:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:27,455 INFO L225 Difference]: With dead ends: 2600 [2021-12-06 17:58:27,455 INFO L226 Difference]: Without dead ends: 1474 [2021-12-06 17:58:27,456 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 [2021-12-06 17:58:27,456 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 120 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:27,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-12-06 17:58:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1227. [2021-12-06 17:58:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.4885807504078303) internal successors, (1825), 1226 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1825 transitions. [2021-12-06 17:58:27,479 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1825 transitions. Word has length 220 [2021-12-06 17:58:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:27,479 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1825 transitions. [2021-12-06 17:58:27,480 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) [2021-12-06 17:58:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1825 transitions. [2021-12-06 17:58:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-06 17:58:27,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:27,481 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, 3, 3, 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] [2021-12-06 17:58:27,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 17:58:27,482 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash -855690769, now seen corresponding path program 1 times [2021-12-06 17:58:27,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787132941] [2021-12-06 17:58:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:27,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:27,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787132941] [2021-12-06 17:58:27,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787132941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:27,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:27,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:27,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503944450] [2021-12-06 17:58:27,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:27,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:27,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:27,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:27,581 INFO L87 Difference]: Start difference. First operand 1227 states and 1825 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) [2021-12-06 17:58:29,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:29,819 INFO L93 Difference]: Finished difference Result 2465 states and 3661 transitions. [2021-12-06 17:58:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:29,820 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 221 [2021-12-06 17:58:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:29,821 INFO L225 Difference]: With dead ends: 2465 [2021-12-06 17:58:29,821 INFO L226 Difference]: Without dead ends: 1261 [2021-12-06 17:58:29,822 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 [2021-12-06 17:58:29,822 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 47 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:29,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 542 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-12-06 17:58:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1227. [2021-12-06 17:58:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.4869494290375205) internal successors, (1823), 1226 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1823 transitions. [2021-12-06 17:58:29,846 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1823 transitions. Word has length 221 [2021-12-06 17:58:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:29,846 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1823 transitions. [2021-12-06 17:58:29,846 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) [2021-12-06 17:58:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1823 transitions. [2021-12-06 17:58:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-06 17:58:29,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:29,848 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 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, 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] [2021-12-06 17:58:29,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 17:58:29,848 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1443073709, now seen corresponding path program 1 times [2021-12-06 17:58:29,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:29,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780548191] [2021-12-06 17:58:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:29,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 17:58:29,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780548191] [2021-12-06 17:58:29,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780548191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:29,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:29,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:29,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413766606] [2021-12-06 17:58:29,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:29,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:29,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:29,940 INFO L87 Difference]: Start difference. First operand 1227 states and 1823 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) [2021-12-06 17:58:31,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:32,218 INFO L93 Difference]: Finished difference Result 2585 states and 3846 transitions. [2021-12-06 17:58:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:32,219 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 222 [2021-12-06 17:58:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:32,220 INFO L225 Difference]: With dead ends: 2585 [2021-12-06 17:58:32,220 INFO L226 Difference]: Without dead ends: 1381 [2021-12-06 17:58:32,221 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 [2021-12-06 17:58:32,221 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 80 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:32,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 583 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-12-06 17:58:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1227. [2021-12-06 17:58:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.4845024469820554) internal successors, (1820), 1226 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1820 transitions. [2021-12-06 17:58:32,249 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1820 transitions. Word has length 222 [2021-12-06 17:58:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:32,249 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1820 transitions. [2021-12-06 17:58:32,249 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) [2021-12-06 17:58:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1820 transitions. [2021-12-06 17:58:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-06 17:58:32,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:32,251 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, 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] [2021-12-06 17:58:32,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 17:58:32,251 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:32,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2141757129, now seen corresponding path program 1 times [2021-12-06 17:58:32,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:32,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360173422] [2021-12-06 17:58:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:32,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:58:32,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:32,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360173422] [2021-12-06 17:58:32,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360173422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:32,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:32,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:32,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379839323] [2021-12-06 17:58:32,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:32,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:32,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:32,332 INFO L87 Difference]: Start difference. First operand 1227 states and 1820 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) [2021-12-06 17:58:34,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:34,665 INFO L93 Difference]: Finished difference Result 2756 states and 4084 transitions. [2021-12-06 17:58:34,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:34,666 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 222 [2021-12-06 17:58:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:34,668 INFO L225 Difference]: With dead ends: 2756 [2021-12-06 17:58:34,668 INFO L226 Difference]: Without dead ends: 1552 [2021-12-06 17:58:34,669 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 [2021-12-06 17:58:34,669 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 113 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:34,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:34,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-12-06 17:58:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1326. [2021-12-06 17:58:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.4875471698113207) internal successors, (1971), 1325 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1971 transitions. [2021-12-06 17:58:34,695 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1971 transitions. Word has length 222 [2021-12-06 17:58:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:34,696 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 1971 transitions. [2021-12-06 17:58:34,696 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) [2021-12-06 17:58:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1971 transitions. [2021-12-06 17:58:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-06 17:58:34,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:34,698 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 3, 3, 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, 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] [2021-12-06 17:58:34,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 17:58:34,698 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1677597631, now seen corresponding path program 1 times [2021-12-06 17:58:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258677892] [2021-12-06 17:58:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:34,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 17:58:34,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:34,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258677892] [2021-12-06 17:58:34,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258677892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:34,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:34,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:34,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100602719] [2021-12-06 17:58:34,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:34,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:34,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:34,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:34,786 INFO L87 Difference]: Start difference. First operand 1326 states and 1971 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) [2021-12-06 17:58:36,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:37,055 INFO L93 Difference]: Finished difference Result 2783 states and 4139 transitions. [2021-12-06 17:58:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:37,055 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 223 [2021-12-06 17:58:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:37,057 INFO L225 Difference]: With dead ends: 2783 [2021-12-06 17:58:37,057 INFO L226 Difference]: Without dead ends: 1480 [2021-12-06 17:58:37,058 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 [2021-12-06 17:58:37,058 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 72 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:37,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 579 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-12-06 17:58:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1326. [2021-12-06 17:58:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.4852830188679245) internal successors, (1968), 1325 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1968 transitions. [2021-12-06 17:58:37,079 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1968 transitions. Word has length 223 [2021-12-06 17:58:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:37,079 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 1968 transitions. [2021-12-06 17:58:37,079 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) [2021-12-06 17:58:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1968 transitions. [2021-12-06 17:58:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-06 17:58:37,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:37,081 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, 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] [2021-12-06 17:58:37,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-06 17:58:37,081 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:37,082 INFO L85 PathProgramCache]: Analyzing trace with hash -265663596, now seen corresponding path program 1 times [2021-12-06 17:58:37,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:37,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254564032] [2021-12-06 17:58:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:37,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 17:58:37,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:37,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254564032] [2021-12-06 17:58:37,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254564032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:37,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:37,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:37,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369892318] [2021-12-06 17:58:37,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:37,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:37,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:37,167 INFO L87 Difference]: Start difference. First operand 1326 states and 1968 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) [2021-12-06 17:58:39,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:39,470 INFO L93 Difference]: Finished difference Result 2828 states and 4173 transitions. [2021-12-06 17:58:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:39,470 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 223 [2021-12-06 17:58:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:39,472 INFO L225 Difference]: With dead ends: 2828 [2021-12-06 17:58:39,472 INFO L226 Difference]: Without dead ends: 1525 [2021-12-06 17:58:39,473 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 [2021-12-06 17:58:39,473 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 112 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:39,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 304 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-12-06 17:58:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1326. [2021-12-06 17:58:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.4792452830188678) internal successors, (1960), 1325 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1960 transitions. [2021-12-06 17:58:39,494 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1960 transitions. Word has length 223 [2021-12-06 17:58:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:39,494 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 1960 transitions. [2021-12-06 17:58:39,494 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) [2021-12-06 17:58:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1960 transitions. [2021-12-06 17:58:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 17:58:39,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:39,496 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 5, 3, 3, 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, 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] [2021-12-06 17:58:39,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-06 17:58:39,496 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1376802131, now seen corresponding path program 1 times [2021-12-06 17:58:39,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:39,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469759114] [2021-12-06 17:58:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:39,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 17:58:39,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:39,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469759114] [2021-12-06 17:58:39,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469759114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:39,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:39,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:39,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189758912] [2021-12-06 17:58:39,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:39,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:39,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:39,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:39,582 INFO L87 Difference]: Start difference. First operand 1326 states and 1960 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) [2021-12-06 17:58:41,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:41,848 INFO L93 Difference]: Finished difference Result 2761 states and 4088 transitions. [2021-12-06 17:58:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:41,849 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 224 [2021-12-06 17:58:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:41,850 INFO L225 Difference]: With dead ends: 2761 [2021-12-06 17:58:41,850 INFO L226 Difference]: Without dead ends: 1458 [2021-12-06 17:58:41,852 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 [2021-12-06 17:58:41,852 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 64 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:41,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 565 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-12-06 17:58:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1326. [2021-12-06 17:58:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.4769811320754718) internal successors, (1957), 1325 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1957 transitions. [2021-12-06 17:58:41,872 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1957 transitions. Word has length 224 [2021-12-06 17:58:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:41,872 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 1957 transitions. [2021-12-06 17:58:41,873 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) [2021-12-06 17:58:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1957 transitions. [2021-12-06 17:58:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 17:58:41,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:41,874 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, 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] [2021-12-06 17:58:41,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 17:58:41,875 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:41,875 INFO L85 PathProgramCache]: Analyzing trace with hash -473713383, now seen corresponding path program 1 times [2021-12-06 17:58:41,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:41,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513148470] [2021-12-06 17:58:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:41,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:41,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:41,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513148470] [2021-12-06 17:58:41,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513148470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:41,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:41,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:41,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132183629] [2021-12-06 17:58:41,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:41,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:41,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:41,960 INFO L87 Difference]: Start difference. First operand 1326 states and 1957 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) [2021-12-06 17:58:43,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:44,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:44,267 INFO L93 Difference]: Finished difference Result 2954 states and 4346 transitions. [2021-12-06 17:58:44,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:44,268 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 224 [2021-12-06 17:58:44,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:44,270 INFO L225 Difference]: With dead ends: 2954 [2021-12-06 17:58:44,270 INFO L226 Difference]: Without dead ends: 1651 [2021-12-06 17:58:44,271 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 [2021-12-06 17:58:44,271 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 110 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:44,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-12-06 17:58:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1431. [2021-12-06 17:58:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 1.474125874125874) internal successors, (2108), 1430 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2108 transitions. [2021-12-06 17:58:44,295 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2108 transitions. Word has length 224 [2021-12-06 17:58:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:44,296 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 2108 transitions. [2021-12-06 17:58:44,296 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) [2021-12-06 17:58:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2108 transitions. [2021-12-06 17:58:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-06 17:58:44,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:44,298 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, 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] [2021-12-06 17:58:44,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-06 17:58:44,298 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:44,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1378487510, now seen corresponding path program 1 times [2021-12-06 17:58:44,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:44,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999926520] [2021-12-06 17:58:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:44,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:44,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:44,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999926520] [2021-12-06 17:58:44,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999926520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:44,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:44,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:44,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262735397] [2021-12-06 17:58:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:44,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:44,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:44,388 INFO L87 Difference]: Start difference. First operand 1431 states and 2108 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) [2021-12-06 17:58:46,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:46,718 INFO L93 Difference]: Finished difference Result 3038 states and 4453 transitions. [2021-12-06 17:58:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:46,718 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 225 [2021-12-06 17:58:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:46,720 INFO L225 Difference]: With dead ends: 3038 [2021-12-06 17:58:46,720 INFO L226 Difference]: Without dead ends: 1630 [2021-12-06 17:58:46,721 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 [2021-12-06 17:58:46,722 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 109 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:46,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 310 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-12-06 17:58:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1431. [2021-12-06 17:58:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 1.4685314685314685) internal successors, (2100), 1430 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2100 transitions. [2021-12-06 17:58:46,747 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2100 transitions. Word has length 225 [2021-12-06 17:58:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:46,747 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 2100 transitions. [2021-12-06 17:58:46,747 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) [2021-12-06 17:58:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2100 transitions. [2021-12-06 17:58:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-06 17:58:46,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:46,749 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, 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] [2021-12-06 17:58:46,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-06 17:58:46,749 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash 995473950, now seen corresponding path program 1 times [2021-12-06 17:58:46,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:46,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342917351] [2021-12-06 17:58:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:46,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:46,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342917351] [2021-12-06 17:58:46,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342917351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:46,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:46,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:46,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040119928] [2021-12-06 17:58:46,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:46,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:46,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:46,840 INFO L87 Difference]: Start difference. First operand 1431 states and 2100 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) [2021-12-06 17:58:48,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:49,053 INFO L93 Difference]: Finished difference Result 2861 states and 4197 transitions. [2021-12-06 17:58:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:49,054 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 226 [2021-12-06 17:58:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:49,055 INFO L225 Difference]: With dead ends: 2861 [2021-12-06 17:58:49,055 INFO L226 Difference]: Without dead ends: 1453 [2021-12-06 17:58:49,056 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 [2021-12-06 17:58:49,057 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 28 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:49,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 524 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-12-06 17:58:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1431. [2021-12-06 17:58:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 1.4671328671328672) internal successors, (2098), 1430 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2098 transitions. [2021-12-06 17:58:49,080 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2098 transitions. Word has length 226 [2021-12-06 17:58:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:49,080 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 2098 transitions. [2021-12-06 17:58:49,080 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) [2021-12-06 17:58:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2098 transitions. [2021-12-06 17:58:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-06 17:58:49,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:49,082 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, 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] [2021-12-06 17:58:49,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-06 17:58:49,082 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1361684283, now seen corresponding path program 1 times [2021-12-06 17:58:49,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093697946] [2021-12-06 17:58:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:49,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:49,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:49,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093697946] [2021-12-06 17:58:49,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093697946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:49,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:49,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:49,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748918426] [2021-12-06 17:58:49,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:49,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:49,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:49,175 INFO L87 Difference]: Start difference. First operand 1431 states and 2098 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) [2021-12-06 17:58:51,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:51,392 INFO L93 Difference]: Finished difference Result 2857 states and 4189 transitions. [2021-12-06 17:58:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:51,392 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 227 [2021-12-06 17:58:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:51,394 INFO L225 Difference]: With dead ends: 2857 [2021-12-06 17:58:51,394 INFO L226 Difference]: Without dead ends: 1449 [2021-12-06 17:58:51,395 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 [2021-12-06 17:58:51,395 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 25 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:51,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 520 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-12-06 17:58:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1431. [2021-12-06 17:58:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 1.4657342657342658) internal successors, (2096), 1430 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2096 transitions. [2021-12-06 17:58:51,420 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2096 transitions. Word has length 227 [2021-12-06 17:58:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:51,420 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 2096 transitions. [2021-12-06 17:58:51,420 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) [2021-12-06 17:58:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2096 transitions. [2021-12-06 17:58:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 17:58:51,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:51,422 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 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, 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] [2021-12-06 17:58:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-06 17:58:51,422 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash -712597084, now seen corresponding path program 1 times [2021-12-06 17:58:51,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:51,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450193024] [2021-12-06 17:58:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:51,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 17:58:51,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450193024] [2021-12-06 17:58:51,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450193024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:51,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:51,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:51,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664925352] [2021-12-06 17:58:51,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:51,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:51,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:51,524 INFO L87 Difference]: Start difference. First operand 1431 states and 2096 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) [2021-12-06 17:58:53,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:53,798 INFO L93 Difference]: Finished difference Result 2965 states and 4348 transitions. [2021-12-06 17:58:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:53,798 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 228 [2021-12-06 17:58:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:53,800 INFO L225 Difference]: With dead ends: 2965 [2021-12-06 17:58:53,800 INFO L226 Difference]: Without dead ends: 1557 [2021-12-06 17:58:53,801 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 [2021-12-06 17:58:53,801 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 57 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:53,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 557 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:58:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-12-06 17:58:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1434. [2021-12-06 17:58:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 1.4647592463363572) internal successors, (2099), 1433 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 2099 transitions. [2021-12-06 17:58:53,825 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 2099 transitions. Word has length 228 [2021-12-06 17:58:53,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:53,825 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 2099 transitions. [2021-12-06 17:58:53,826 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) [2021-12-06 17:58:53,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 2099 transitions. [2021-12-06 17:58:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-06 17:58:53,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:53,828 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 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] [2021-12-06 17:58:53,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-06 17:58:53,828 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 939848528, now seen corresponding path program 1 times [2021-12-06 17:58:53,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:53,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392296012] [2021-12-06 17:58:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:53,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 17:58:53,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:53,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392296012] [2021-12-06 17:58:53,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392296012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:53,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:53,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:53,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354386176] [2021-12-06 17:58:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:53,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:53,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:53,917 INFO L87 Difference]: Start difference. First operand 1434 states and 2099 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) [2021-12-06 17:58:55,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:56,207 INFO L93 Difference]: Finished difference Result 2956 states and 4333 transitions. [2021-12-06 17:58:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:56,207 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 229 [2021-12-06 17:58:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:56,210 INFO L225 Difference]: With dead ends: 2956 [2021-12-06 17:58:56,210 INFO L226 Difference]: Without dead ends: 1545 [2021-12-06 17:58:56,211 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 [2021-12-06 17:58:56,212 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 51 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:56,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 549 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-12-06 17:58:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1437. [2021-12-06 17:58:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 1.4637883008356547) internal successors, (2102), 1436 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2102 transitions. [2021-12-06 17:58:56,236 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2102 transitions. Word has length 229 [2021-12-06 17:58:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:56,237 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 2102 transitions. [2021-12-06 17:58:56,237 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) [2021-12-06 17:58:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2102 transitions. [2021-12-06 17:58:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 17:58:56,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:56,239 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, 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] [2021-12-06 17:58:56,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-06 17:58:56,239 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1215121339, now seen corresponding path program 1 times [2021-12-06 17:58:56,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:56,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548441412] [2021-12-06 17:58:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:56,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:58:56,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548441412] [2021-12-06 17:58:56,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548441412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:56,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:56,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:56,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229369911] [2021-12-06 17:58:56,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:56,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:56,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:56,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:56,335 INFO L87 Difference]: Start difference. First operand 1437 states and 2102 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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) [2021-12-06 17:58:58,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:58:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:58:58,649 INFO L93 Difference]: Finished difference Result 3275 states and 4786 transitions. [2021-12-06 17:58:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:58:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 230 [2021-12-06 17:58:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:58:58,651 INFO L225 Difference]: With dead ends: 3275 [2021-12-06 17:58:58,651 INFO L226 Difference]: Without dead ends: 1861 [2021-12-06 17:58:58,652 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 [2021-12-06 17:58:58,653 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 105 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:58:58,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 312 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:58:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-12-06 17:58:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1653. [2021-12-06 17:58:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 1.4691283292978208) internal successors, (2427), 1652 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2427 transitions. [2021-12-06 17:58:58,680 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2427 transitions. Word has length 230 [2021-12-06 17:58:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:58,680 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 2427 transitions. [2021-12-06 17:58:58,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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) [2021-12-06 17:58:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2427 transitions. [2021-12-06 17:58:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-06 17:58:58,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:58,683 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 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, 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] [2021-12-06 17:58:58,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-06 17:58:58,683 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2076780555, now seen corresponding path program 1 times [2021-12-06 17:58:58,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:58,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100604964] [2021-12-06 17:58:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:58,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 17:58:58,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:58,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100604964] [2021-12-06 17:58:58,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100604964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:58:58,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:58:58,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:58:58,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38357310] [2021-12-06 17:58:58,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:58:58,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:58:58,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:58:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:58:58,773 INFO L87 Difference]: Start difference. First operand 1653 states and 2427 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) [2021-12-06 17:59:00,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:01,038 INFO L93 Difference]: Finished difference Result 3391 states and 4980 transitions. [2021-12-06 17:59:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:01,038 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 231 [2021-12-06 17:59:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:01,039 INFO L225 Difference]: With dead ends: 3391 [2021-12-06 17:59:01,040 INFO L226 Difference]: Without dead ends: 1761 [2021-12-06 17:59:01,041 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 [2021-12-06 17:59:01,041 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:01,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 545 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:59:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-12-06 17:59:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1662. [2021-12-06 17:59:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 1.4683925346177003) internal successors, (2439), 1661 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2439 transitions. [2021-12-06 17:59:01,071 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2439 transitions. Word has length 231 [2021-12-06 17:59:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:01,071 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 2439 transitions. [2021-12-06 17:59:01,071 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) [2021-12-06 17:59:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2439 transitions. [2021-12-06 17:59:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-06 17:59:01,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:01,073 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, 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] [2021-12-06 17:59:01,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-06 17:59:01,073 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:01,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash 168015746, now seen corresponding path program 1 times [2021-12-06 17:59:01,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:01,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823398781] [2021-12-06 17:59:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:01,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 17:59:01,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823398781] [2021-12-06 17:59:01,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823398781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:01,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:01,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:59:01,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418781910] [2021-12-06 17:59:01,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:01,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:01,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:01,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:01,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:01,166 INFO L87 Difference]: Start difference. First operand 1662 states and 2439 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:03,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:03,481 INFO L93 Difference]: Finished difference Result 3500 states and 5115 transitions. [2021-12-06 17:59:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 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 [2021-12-06 17:59:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:03,483 INFO L225 Difference]: With dead ends: 3500 [2021-12-06 17:59:03,483 INFO L226 Difference]: Without dead ends: 1861 [2021-12-06 17:59:03,484 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 [2021-12-06 17:59:03,484 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 104 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:03,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 310 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:59:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-12-06 17:59:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1662. [2021-12-06 17:59:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 1.4635761589403973) internal successors, (2431), 1661 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2431 transitions. [2021-12-06 17:59:03,518 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2431 transitions. Word has length 231 [2021-12-06 17:59:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:03,518 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 2431 transitions. [2021-12-06 17:59:03,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:03,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2431 transitions. [2021-12-06 17:59:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-06 17:59:03,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:03,520 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 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, 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] [2021-12-06 17:59:03,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-06 17:59:03,520 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1041424415, now seen corresponding path program 1 times [2021-12-06 17:59:03,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:03,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959185284] [2021-12-06 17:59:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:03,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 17:59:03,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:03,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959185284] [2021-12-06 17:59:03,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959185284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:03,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:03,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:59:03,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783095001] [2021-12-06 17:59:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:03,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:03,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:03,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:03,609 INFO L87 Difference]: Start difference. First operand 1662 states and 2431 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) [2021-12-06 17:59:05,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:05,849 INFO L93 Difference]: Finished difference Result 3367 states and 4919 transitions. [2021-12-06 17:59:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:05,850 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 232 [2021-12-06 17:59:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:05,851 INFO L225 Difference]: With dead ends: 3367 [2021-12-06 17:59:05,851 INFO L226 Difference]: Without dead ends: 1728 [2021-12-06 17:59:05,852 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 [2021-12-06 17:59:05,852 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 32 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:05,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 531 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:59:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-12-06 17:59:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1665. [2021-12-06 17:59:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 1.4627403846153846) internal successors, (2434), 1664 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) [2021-12-06 17:59:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2434 transitions. [2021-12-06 17:59:05,881 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2434 transitions. Word has length 232 [2021-12-06 17:59:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:05,881 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 2434 transitions. [2021-12-06 17:59:05,881 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) [2021-12-06 17:59:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2434 transitions. [2021-12-06 17:59:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-06 17:59:05,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:05,883 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, 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] [2021-12-06 17:59:05,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-06 17:59:05,884 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1882170829, now seen corresponding path program 1 times [2021-12-06 17:59:05,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731194872] [2021-12-06 17:59:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:05,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 17:59:05,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:05,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731194872] [2021-12-06 17:59:05,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731194872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:05,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:05,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:59:05,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740660109] [2021-12-06 17:59:05,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:05,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:05,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:05,976 INFO L87 Difference]: Start difference. First operand 1665 states and 2434 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) [2021-12-06 17:59:07,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:08,229 INFO L93 Difference]: Finished difference Result 3370 states and 4919 transitions. [2021-12-06 17:59:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:08,230 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 232 [2021-12-06 17:59:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:08,231 INFO L225 Difference]: With dead ends: 3370 [2021-12-06 17:59:08,231 INFO L226 Difference]: Without dead ends: 1728 [2021-12-06 17:59:08,232 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 [2021-12-06 17:59:08,232 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 30 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:08,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 529 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:59:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-12-06 17:59:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1668. [2021-12-06 17:59:08,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 1.4619076184763047) internal successors, (2437), 1667 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2437 transitions. [2021-12-06 17:59:08,264 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2437 transitions. Word has length 232 [2021-12-06 17:59:08,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:08,264 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2437 transitions. [2021-12-06 17:59:08,264 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) [2021-12-06 17:59:08,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2437 transitions. [2021-12-06 17:59:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-06 17:59:08,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:08,267 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, 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] [2021-12-06 17:59:08,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-06 17:59:08,267 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1442086911, now seen corresponding path program 1 times [2021-12-06 17:59:08,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:08,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931510709] [2021-12-06 17:59:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:08,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-06 17:59:08,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:08,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931510709] [2021-12-06 17:59:08,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931510709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:08,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:08,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:59:08,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997595385] [2021-12-06 17:59:08,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:08,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:08,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:08,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:08,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:08,363 INFO L87 Difference]: Start difference. First operand 1668 states and 2437 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) [2021-12-06 17:59:10,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:10,582 INFO L93 Difference]: Finished difference Result 3367 states and 4913 transitions. [2021-12-06 17:59:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:10,583 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 233 [2021-12-06 17:59:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:10,584 INFO L225 Difference]: With dead ends: 3367 [2021-12-06 17:59:10,584 INFO L226 Difference]: Without dead ends: 1722 [2021-12-06 17:59:10,585 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 [2021-12-06 17:59:10,585 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 27 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:10,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 525 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:59:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-12-06 17:59:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1671. [2021-12-06 17:59:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 1.4610778443113772) internal successors, (2440), 1670 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2440 transitions. [2021-12-06 17:59:10,614 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2440 transitions. Word has length 233 [2021-12-06 17:59:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:10,614 INFO L470 AbstractCegarLoop]: Abstraction has 1671 states and 2440 transitions. [2021-12-06 17:59:10,614 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) [2021-12-06 17:59:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2440 transitions. [2021-12-06 17:59:10,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-06 17:59:10,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:10,616 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] [2021-12-06 17:59:10,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-06 17:59:10,616 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash 198969349, now seen corresponding path program 1 times [2021-12-06 17:59:10,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:10,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859333346] [2021-12-06 17:59:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:10,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 17:59:10,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:10,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859333346] [2021-12-06 17:59:10,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859333346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:10,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:10,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:59:10,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543044687] [2021-12-06 17:59:10,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:10,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:59:10,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:10,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:59:10,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:59:10,801 INFO L87 Difference]: Start difference. First operand 1671 states and 2440 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) [2021-12-06 17:59:12,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:13,270 INFO L93 Difference]: Finished difference Result 3707 states and 5383 transitions. [2021-12-06 17:59:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:59:13,270 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 [2021-12-06 17:59:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:13,272 INFO L225 Difference]: With dead ends: 3707 [2021-12-06 17:59:13,272 INFO L226 Difference]: Without dead ends: 2059 [2021-12-06 17:59:13,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:59:13,274 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 172 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:13,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 721 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 426 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 17:59:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-12-06 17:59:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1737. [2021-12-06 17:59:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 1.457373271889401) internal successors, (2530), 1736 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2530 transitions. [2021-12-06 17:59:13,313 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2530 transitions. Word has length 234 [2021-12-06 17:59:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:13,313 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2530 transitions. [2021-12-06 17:59:13,313 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) [2021-12-06 17:59:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2530 transitions. [2021-12-06 17:59:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-06 17:59:13,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:13,316 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] [2021-12-06 17:59:13,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-06 17:59:13,316 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1942891129, now seen corresponding path program 1 times [2021-12-06 17:59:13,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:13,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413660465] [2021-12-06 17:59:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:13,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 297 proven. 105 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 17:59:13,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413660465] [2021-12-06 17:59:13,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413660465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942371807] [2021-12-06 17:59:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:13,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:13,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:13,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:59:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:59:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:14,217 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 17:59:14,217 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 17:59:14,252 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:59:14,253 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 [2021-12-06 17:59:14,311 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 [2021-12-06 17:59:14,326 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 31 treesize of output 19 [2021-12-06 17:59:14,328 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 13 [2021-12-06 17:59:14,351 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-12-06 17:59:14,351 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 32 [2021-12-06 17:59:14,415 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-12-06 17:59:14,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2021-12-06 17:59:14,501 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 [2021-12-06 17:59:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 305 proven. 48 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-06 17:59:14,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:59:14,741 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 38 treesize of output 26 [2021-12-06 17:59:14,743 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 26 treesize of output 20 [2021-12-06 17:59:16,746 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_21 Int) (v_arrayElimCell_20 Int)) (not (= 8496 (select (select (store |c_#memory_int| v_arrayElimCell_20 (store (select |c_#memory_int| v_arrayElimCell_20) (+ 844 v_arrayElimCell_21) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|))))) is different from false [2021-12-06 17:59:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 17:59:16,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942371807] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:16,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:59:16,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 7] total 20 [2021-12-06 17:59:16,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13683984] [2021-12-06 17:59:16,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:16,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:59:16,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:59:16,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=293, Unknown=1, NotChecked=34, Total=380 [2021-12-06 17:59:16,817 INFO L87 Difference]: Start difference. First operand 1737 states and 2530 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) [2021-12-06 17:59:18,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:21,093 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_21 Int) (v_arrayElimCell_20 Int)) (not (= 8496 (select (select (store |c_#memory_int| v_arrayElimCell_20 (store (select |c_#memory_int| v_arrayElimCell_20) (+ 844 v_arrayElimCell_21) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|))))) (not (= 8496 (select (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|))))) is different from false [2021-12-06 17:59:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:21,159 INFO L93 Difference]: Finished difference Result 3680 states and 5336 transitions. [2021-12-06 17:59:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:59:21,159 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 [2021-12-06 17:59:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:21,161 INFO L225 Difference]: With dead ends: 3680 [2021-12-06 17:59:21,161 INFO L226 Difference]: Without dead ends: 1966 [2021-12-06 17:59:21,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 463 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=60, Invalid=326, Unknown=2, NotChecked=74, Total=462 [2021-12-06 17:59:21,162 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 122 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:21,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 451 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 255 Invalid, 1 Unknown, 259 Unchecked, 2.3s Time] [2021-12-06 17:59:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-12-06 17:59:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1605. [2021-12-06 17:59:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 1.4557356608478802) internal successors, (2335), 1604 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2335 transitions. [2021-12-06 17:59:21,192 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2335 transitions. Word has length 234 [2021-12-06 17:59:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:21,192 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 2335 transitions. [2021-12-06 17:59:21,192 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) [2021-12-06 17:59:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2335 transitions. [2021-12-06 17:59:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-06 17:59:21,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:21,194 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 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, 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] [2021-12-06 17:59:21,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 17:59:21,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 17:59:21,395 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash -682883463, now seen corresponding path program 1 times [2021-12-06 17:59:21,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:21,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489867327] [2021-12-06 17:59:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:21,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 17:59:21,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:21,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489867327] [2021-12-06 17:59:21,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489867327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:21,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:21,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:59:21,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27885053] [2021-12-06 17:59:21,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:21,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:21,496 INFO L87 Difference]: Start difference. First operand 1605 states and 2335 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) [2021-12-06 17:59:23,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:23,731 INFO L93 Difference]: Finished difference Result 3232 states and 4694 transitions. [2021-12-06 17:59:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:23,732 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 235 [2021-12-06 17:59:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:23,733 INFO L225 Difference]: With dead ends: 3232 [2021-12-06 17:59:23,733 INFO L226 Difference]: Without dead ends: 1650 [2021-12-06 17:59:23,734 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 [2021-12-06 17:59:23,734 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 29 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:23,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 523 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:59:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-06 17:59:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1605. [2021-12-06 17:59:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 1.453865336658354) internal successors, (2332), 1604 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2332 transitions. [2021-12-06 17:59:23,766 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2332 transitions. Word has length 235 [2021-12-06 17:59:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:23,766 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 2332 transitions. [2021-12-06 17:59:23,766 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) [2021-12-06 17:59:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2332 transitions. [2021-12-06 17:59:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-06 17:59:23,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:23,768 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] [2021-12-06 17:59:23,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-06 17:59:23,769 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:23,769 INFO L85 PathProgramCache]: Analyzing trace with hash 999970559, now seen corresponding path program 1 times [2021-12-06 17:59:23,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:23,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588818378] [2021-12-06 17:59:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:23,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 17:59:23,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:23,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588818378] [2021-12-06 17:59:23,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588818378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:23,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:23,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:59:23,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741317179] [2021-12-06 17:59:23,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:23,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:59:23,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:59:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:59:23,943 INFO L87 Difference]: Start difference. First operand 1605 states and 2332 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) [2021-12-06 17:59:25,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:27,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:28,607 INFO L93 Difference]: Finished difference Result 3734 states and 5371 transitions. [2021-12-06 17:59:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:59:28,608 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 [2021-12-06 17:59:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:28,610 INFO L225 Difference]: With dead ends: 3734 [2021-12-06 17:59:28,610 INFO L226 Difference]: Without dead ends: 2152 [2021-12-06 17:59:28,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:59:28,611 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 324 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 44 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:28,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 754 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 485 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2021-12-06 17:59:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-12-06 17:59:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1674. [2021-12-06 17:59:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.4476987447698744) internal successors, (2422), 1673 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2422 transitions. [2021-12-06 17:59:28,647 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2422 transitions. Word has length 235 [2021-12-06 17:59:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:28,647 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 2422 transitions. [2021-12-06 17:59:28,647 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) [2021-12-06 17:59:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2422 transitions. [2021-12-06 17:59:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-06 17:59:28,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:28,649 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] [2021-12-06 17:59:28,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-06 17:59:28,650 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash -973194819, now seen corresponding path program 1 times [2021-12-06 17:59:28,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:28,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824708543] [2021-12-06 17:59:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:28,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 17:59:28,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:28,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824708543] [2021-12-06 17:59:28,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824708543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:28,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:28,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:59:28,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542671547] [2021-12-06 17:59:28,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:28,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:59:28,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:28,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:59:28,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:59:28,843 INFO L87 Difference]: Start difference. First operand 1674 states and 2422 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) [2021-12-06 17:59:30,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:32,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:34,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:36,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:38,030 INFO L93 Difference]: Finished difference Result 4006 states and 5754 transitions. [2021-12-06 17:59:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:59:38,031 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 [2021-12-06 17:59:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:38,032 INFO L225 Difference]: With dead ends: 4006 [2021-12-06 17:59:38,033 INFO L226 Difference]: Without dead ends: 2355 [2021-12-06 17:59:38,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:59:38,034 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 185 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 34 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:38,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1175 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 986 Invalid, 4 Unknown, 0 Unchecked, 9.1s Time] [2021-12-06 17:59:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-12-06 17:59:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2174. [2021-12-06 17:59:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 1.4394845835250805) internal successors, (3128), 2173 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3128 transitions. [2021-12-06 17:59:38,078 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3128 transitions. Word has length 235 [2021-12-06 17:59:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:38,078 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 3128 transitions. [2021-12-06 17:59:38,078 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) [2021-12-06 17:59:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3128 transitions. [2021-12-06 17:59:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-06 17:59:38,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:38,081 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, 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] [2021-12-06 17:59:38,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-06 17:59:38,081 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:38,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1772778604, now seen corresponding path program 1 times [2021-12-06 17:59:38,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:38,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633089079] [2021-12-06 17:59:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:38,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-06 17:59:38,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:38,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633089079] [2021-12-06 17:59:38,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633089079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:38,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:38,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:59:38,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301228907] [2021-12-06 17:59:38,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:38,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:38,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:38,183 INFO L87 Difference]: Start difference. First operand 2174 states and 3128 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) [2021-12-06 17:59:40,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:40,447 INFO L93 Difference]: Finished difference Result 4495 states and 6461 transitions. [2021-12-06 17:59:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:40,448 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 236 [2021-12-06 17:59:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:40,450 INFO L225 Difference]: With dead ends: 4495 [2021-12-06 17:59:40,450 INFO L226 Difference]: Without dead ends: 2344 [2021-12-06 17:59:40,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:59:40,451 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 34 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:40,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 557 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 178 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:59:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-12-06 17:59:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2270. [2021-12-06 17:59:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 1.4385191714411636) internal successors, (3264), 2269 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3264 transitions. [2021-12-06 17:59:40,496 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3264 transitions. Word has length 236 [2021-12-06 17:59:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:40,496 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 3264 transitions. [2021-12-06 17:59:40,496 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) [2021-12-06 17:59:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3264 transitions. [2021-12-06 17:59:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-06 17:59:40,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:40,499 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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] [2021-12-06 17:59:40,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-06 17:59:40,499 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash 253378678, now seen corresponding path program 1 times [2021-12-06 17:59:40,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:40,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198957223] [2021-12-06 17:59:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:40,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-06 17:59:40,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:40,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198957223] [2021-12-06 17:59:40,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198957223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:40,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:40,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:59:40,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473220552] [2021-12-06 17:59:40,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:40,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:40,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:40,614 INFO L87 Difference]: Start difference. First operand 2270 states and 3264 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 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) [2021-12-06 17:59:42,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:42,392 INFO L93 Difference]: Finished difference Result 4579 states and 6573 transitions. [2021-12-06 17:59:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 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 250 [2021-12-06 17:59:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:42,394 INFO L225 Difference]: With dead ends: 4579 [2021-12-06 17:59:42,394 INFO L226 Difference]: Without dead ends: 2320 [2021-12-06 17:59:42,395 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 [2021-12-06 17:59:42,396 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 14 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:42,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 521 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:59:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-12-06 17:59:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2305. [2021-12-06 17:59:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 1.4340277777777777) internal successors, (3304), 2304 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3304 transitions. [2021-12-06 17:59:42,446 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3304 transitions. Word has length 250 [2021-12-06 17:59:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:42,447 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 3304 transitions. [2021-12-06 17:59:42,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 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) [2021-12-06 17:59:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3304 transitions. [2021-12-06 17:59:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-06 17:59:42,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:42,449 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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] [2021-12-06 17:59:42,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-06 17:59:42,449 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash -885025785, now seen corresponding path program 1 times [2021-12-06 17:59:42,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:42,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292491258] [2021-12-06 17:59:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:42,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 17:59:42,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:42,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292491258] [2021-12-06 17:59:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292491258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:42,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:42,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:59:42,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427167055] [2021-12-06 17:59:42,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:42,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:59:42,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:59:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:59:42,553 INFO L87 Difference]: Start difference. First operand 2305 states and 3304 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) [2021-12-06 17:59:44,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:44,810 INFO L93 Difference]: Finished difference Result 4623 states and 6626 transitions. [2021-12-06 17:59:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:59:44,810 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 251 [2021-12-06 17:59:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:44,812 INFO L225 Difference]: With dead ends: 4623 [2021-12-06 17:59:44,812 INFO L226 Difference]: Without dead ends: 2341 [2021-12-06 17:59:44,813 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 [2021-12-06 17:59:44,813 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 18 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:44,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 524 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:59:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-12-06 17:59:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2305. [2021-12-06 17:59:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 1.4327256944444444) internal successors, (3301), 2304 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3301 transitions. [2021-12-06 17:59:44,864 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3301 transitions. Word has length 251 [2021-12-06 17:59:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:44,864 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 3301 transitions. [2021-12-06 17:59:44,864 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) [2021-12-06 17:59:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3301 transitions. [2021-12-06 17:59:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-06 17:59:44,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:44,866 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] [2021-12-06 17:59:44,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-06 17:59:44,866 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 204295532, now seen corresponding path program 1 times [2021-12-06 17:59:44,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:44,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136036766] [2021-12-06 17:59:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:44,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 17:59:45,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:45,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136036766] [2021-12-06 17:59:45,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136036766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:45,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:45,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:59:45,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328376832] [2021-12-06 17:59:45,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:45,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:59:45,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:59:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:59:45,010 INFO L87 Difference]: Start difference. First operand 2305 states and 3301 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) [2021-12-06 17:59:47,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:47,428 INFO L93 Difference]: Finished difference Result 4919 states and 7023 transitions. [2021-12-06 17:59:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:59:47,429 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 [2021-12-06 17:59:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:47,431 INFO L225 Difference]: With dead ends: 4919 [2021-12-06 17:59:47,431 INFO L226 Difference]: Without dead ends: 2637 [2021-12-06 17:59:47,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:59:47,432 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 229 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:47,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 601 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 310 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:59:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-12-06 17:59:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2305. [2021-12-06 17:59:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 1.4279513888888888) internal successors, (3290), 2304 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3290 transitions. [2021-12-06 17:59:47,477 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3290 transitions. Word has length 252 [2021-12-06 17:59:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:47,477 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 3290 transitions. [2021-12-06 17:59:47,477 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) [2021-12-06 17:59:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3290 transitions. [2021-12-06 17:59:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-06 17:59:47,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:47,479 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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] [2021-12-06 17:59:47,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-06 17:59:47,479 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -560802044, now seen corresponding path program 1 times [2021-12-06 17:59:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128644712] [2021-12-06 17:59:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:47,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 330 proven. 50 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-06 17:59:47,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:47,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128644712] [2021-12-06 17:59:47,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128644712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:59:47,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094309115] [2021-12-06 17:59:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:47,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:59:47,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:59:47,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:59:47,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:59:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:48,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:59:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:59:48,395 INFO L354 Elim1Store]: treesize reduction 37, result has 45.6 percent of original size [2021-12-06 17:59:48,395 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 128 treesize of output 111 [2021-12-06 17:59:48,398 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 126 treesize of output 96 [2021-12-06 17:59:48,400 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 96 treesize of output 66 [2021-12-06 17:59:48,470 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 [2021-12-06 17:59:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-06 17:59:48,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:59:48,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094309115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:48,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:59:48,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-06 17:59:48,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625421153] [2021-12-06 17:59:48,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:48,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:59:48,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:59:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:59:48,541 INFO L87 Difference]: Start difference. First operand 2305 states and 3290 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 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) [2021-12-06 17:59:50,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:51,030 INFO L93 Difference]: Finished difference Result 4282 states and 6123 transitions. [2021-12-06 17:59:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:59:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 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 252 [2021-12-06 17:59:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:51,035 INFO L225 Difference]: With dead ends: 4282 [2021-12-06 17:59:51,035 INFO L226 Difference]: Without dead ends: 2000 [2021-12-06 17:59:51,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:59:51,036 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 206 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:51,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 669 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 415 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 17:59:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-12-06 17:59:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1746. [2021-12-06 17:59:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 1.4355300859598854) internal successors, (2505), 1745 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2505 transitions. [2021-12-06 17:59:51,071 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2505 transitions. Word has length 252 [2021-12-06 17:59:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:51,071 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2505 transitions. [2021-12-06 17:59:51,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 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) [2021-12-06 17:59:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2505 transitions. [2021-12-06 17:59:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-06 17:59:51,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:51,073 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] [2021-12-06 17:59:51,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:59:51,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-06 17:59:51,274 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash -502301074, now seen corresponding path program 1 times [2021-12-06 17:59:51,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:51,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61064715] [2021-12-06 17:59:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:51,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 17:59:51,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:51,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61064715] [2021-12-06 17:59:51,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61064715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:51,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:51,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:59:51,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156175834] [2021-12-06 17:59:51,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:51,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:59:51,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:59:51,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:59:51,513 INFO L87 Difference]: Start difference. First operand 1746 states and 2505 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) [2021-12-06 17:59:53,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:55,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:57,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:59:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:58,582 INFO L93 Difference]: Finished difference Result 4237 states and 6034 transitions. [2021-12-06 17:59:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:59:58,582 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 [2021-12-06 17:59:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:58,584 INFO L225 Difference]: With dead ends: 4237 [2021-12-06 17:59:58,584 INFO L226 Difference]: Without dead ends: 2514 [2021-12-06 17:59:58,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:59:58,585 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 306 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 66 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:58,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1031 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 817 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2021-12-06 17:59:58,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-12-06 17:59:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2333. [2021-12-06 17:59:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2332 states have (on average 1.4258147512864494) internal successors, (3325), 2332 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3325 transitions. [2021-12-06 17:59:58,637 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3325 transitions. Word has length 252 [2021-12-06 17:59:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:59:58,637 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 3325 transitions. [2021-12-06 17:59:58,637 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) [2021-12-06 17:59:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3325 transitions. [2021-12-06 17:59:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-06 17:59:58,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:59:58,639 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] [2021-12-06 17:59:58,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-06 17:59:58,639 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:59:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:59:58,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1345889978, now seen corresponding path program 1 times [2021-12-06 17:59:58,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:59:58,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724734786] [2021-12-06 17:59:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:59:58,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:59:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:59:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 17:59:58,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:59:58,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724734786] [2021-12-06 17:59:58,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724734786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:59:58,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:59:58,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:59:58,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799876566] [2021-12-06 17:59:58,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:59:58,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:59:58,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:58,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:59:58,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:59:58,810 INFO L87 Difference]: Start difference. First operand 2333 states and 3325 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) [2021-12-06 18:00:00,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:02,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:03,514 INFO L93 Difference]: Finished difference Result 5152 states and 7305 transitions. [2021-12-06 18:00:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:00:03,515 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 [2021-12-06 18:00:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:03,516 INFO L225 Difference]: With dead ends: 5152 [2021-12-06 18:00:03,516 INFO L226 Difference]: Without dead ends: 2842 [2021-12-06 18:00:03,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:00:03,517 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 316 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:03,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 753 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 484 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2021-12-06 18:00:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-12-06 18:00:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2336. [2021-12-06 18:00:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 1.4218415417558887) internal successors, (3320), 2335 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3320 transitions. [2021-12-06 18:00:03,565 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3320 transitions. Word has length 253 [2021-12-06 18:00:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:03,565 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 3320 transitions. [2021-12-06 18:00:03,565 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) [2021-12-06 18:00:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3320 transitions. [2021-12-06 18:00:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-06 18:00:03,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:03,567 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] [2021-12-06 18:00:03,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-12-06 18:00:03,567 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1775548284, now seen corresponding path program 1 times [2021-12-06 18:00:03,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:03,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542751384] [2021-12-06 18:00:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:03,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 18:00:03,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:03,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542751384] [2021-12-06 18:00:03,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542751384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:03,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:03,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:00:03,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306644104] [2021-12-06 18:00:03,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:03,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:00:03,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:03,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:00:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:00:03,747 INFO L87 Difference]: Start difference. First operand 2336 states and 3320 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) [2021-12-06 18:00:05,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:07,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:09,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:10,802 INFO L93 Difference]: Finished difference Result 5417 states and 7662 transitions. [2021-12-06 18:00:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:00:10,803 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 [2021-12-06 18:00:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:10,805 INFO L225 Difference]: With dead ends: 5417 [2021-12-06 18:00:10,805 INFO L226 Difference]: Without dead ends: 3104 [2021-12-06 18:00:10,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:00:10,806 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 305 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 66 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:10,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1034 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 817 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2021-12-06 18:00:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-12-06 18:00:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2336. [2021-12-06 18:00:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 1.4218415417558887) internal successors, (3320), 2335 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3320 transitions. [2021-12-06 18:00:10,855 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3320 transitions. Word has length 253 [2021-12-06 18:00:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:10,855 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 3320 transitions. [2021-12-06 18:00:10,855 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) [2021-12-06 18:00:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3320 transitions. [2021-12-06 18:00:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-06 18:00:10,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:10,857 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 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] [2021-12-06 18:00:10,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-12-06 18:00:10,857 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1218153449, now seen corresponding path program 1 times [2021-12-06 18:00:10,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:10,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265491564] [2021-12-06 18:00:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:10,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-06 18:00:10,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265491564] [2021-12-06 18:00:10,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265491564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:10,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:10,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:00:10,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136261636] [2021-12-06 18:00:10,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:10,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:00:10,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:00:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:00:10,973 INFO L87 Difference]: Start difference. First operand 2336 states and 3320 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) [2021-12-06 18:00:12,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:13,316 INFO L93 Difference]: Finished difference Result 4860 states and 6905 transitions. [2021-12-06 18:00:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:00:13,317 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 257 [2021-12-06 18:00:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:13,319 INFO L225 Difference]: With dead ends: 4860 [2021-12-06 18:00:13,319 INFO L226 Difference]: Without dead ends: 2547 [2021-12-06 18:00:13,320 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 [2021-12-06 18:00:13,320 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 68 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:13,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 577 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 18:00:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-12-06 18:00:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2336. [2021-12-06 18:00:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 1.4197002141327624) internal successors, (3315), 2335 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3315 transitions. [2021-12-06 18:00:13,372 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3315 transitions. Word has length 257 [2021-12-06 18:00:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:13,372 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 3315 transitions. [2021-12-06 18:00:13,372 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) [2021-12-06 18:00:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3315 transitions. [2021-12-06 18:00:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-06 18:00:13,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:13,381 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 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] [2021-12-06 18:00:13,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-12-06 18:00:13,381 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:13,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:13,382 INFO L85 PathProgramCache]: Analyzing trace with hash -797549384, now seen corresponding path program 1 times [2021-12-06 18:00:13,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:13,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381243877] [2021-12-06 18:00:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:13,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-12-06 18:00:13,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381243877] [2021-12-06 18:00:13,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381243877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:13,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:13,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:00:13,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784629660] [2021-12-06 18:00:13,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:13,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:00:13,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:00:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:00:13,480 INFO L87 Difference]: Start difference. First operand 2336 states and 3315 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) [2021-12-06 18:00:15,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:15,820 INFO L93 Difference]: Finished difference Result 4990 states and 7085 transitions. [2021-12-06 18:00:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:00:15,821 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 260 [2021-12-06 18:00:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:15,823 INFO L225 Difference]: With dead ends: 4990 [2021-12-06 18:00:15,823 INFO L226 Difference]: Without dead ends: 2677 [2021-12-06 18:00:15,824 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 [2021-12-06 18:00:15,824 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 67 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:15,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 577 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 18:00:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-12-06 18:00:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2439. [2021-12-06 18:00:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2438 states have (on average 1.4179655455291222) internal successors, (3457), 2438 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 3457 transitions. [2021-12-06 18:00:15,877 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 3457 transitions. Word has length 260 [2021-12-06 18:00:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:15,877 INFO L470 AbstractCegarLoop]: Abstraction has 2439 states and 3457 transitions. [2021-12-06 18:00:15,877 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) [2021-12-06 18:00:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 3457 transitions. [2021-12-06 18:00:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-06 18:00:15,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:15,879 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] [2021-12-06 18:00:15,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-12-06 18:00:15,879 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:15,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1482178204, now seen corresponding path program 1 times [2021-12-06 18:00:15,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:15,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489727700] [2021-12-06 18:00:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:15,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2021-12-06 18:00:16,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:16,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489727700] [2021-12-06 18:00:16,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489727700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:16,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:16,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:00:16,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470555334] [2021-12-06 18:00:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:16,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:00:16,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:00:16,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:00:16,125 INFO L87 Difference]: Start difference. First operand 2439 states and 3457 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) [2021-12-06 18:00:18,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:20,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:00:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:20,477 INFO L93 Difference]: Finished difference Result 4875 states and 6910 transitions. [2021-12-06 18:00:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:00:20,477 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 [2021-12-06 18:00:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:20,479 INFO L225 Difference]: With dead ends: 4875 [2021-12-06 18:00:20,479 INFO L226 Difference]: Without dead ends: 2439 [2021-12-06 18:00:20,480 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 [2021-12-06 18:00:20,480 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:20,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 631 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 18:00:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2021-12-06 18:00:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2439. [2021-12-06 18:00:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2438 states have (on average 1.4175553732567678) internal successors, (3456), 2438 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 3456 transitions. [2021-12-06 18:00:20,533 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 3456 transitions. Word has length 263 [2021-12-06 18:00:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 2439 states and 3456 transitions. [2021-12-06 18:00:20,533 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) [2021-12-06 18:00:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 3456 transitions. [2021-12-06 18:00:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-06 18:00:20,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:20,535 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] [2021-12-06 18:00:20,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-12-06 18:00:20,535 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash 350204006, now seen corresponding path program 1 times [2021-12-06 18:00:20,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:20,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449107137] [2021-12-06 18:00:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:20,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 302 proven. 225 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 18:00:21,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:21,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449107137] [2021-12-06 18:00:21,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449107137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:21,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302402394] [2021-12-06 18:00:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:21,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:21,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:21,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cee13-72f2-44e9-8a03-9aaaf45c71e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:00:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:22,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 185 conjunts are in the unsatisfiable core [2021-12-06 18:00:22,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:31,914 WARN L227 SmtUtils]: Spent 9.37s on a formula simplification. DAG size of input: 116 DAG size of output: 45 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 18:00:31,914 INFO L354 Elim1Store]: treesize reduction 445, result has 16.8 percent of original size [2021-12-06 18:00:31,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 9 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 14 new quantified variables, introduced 15 case distinctions, treesize of input 2307306065796 treesize of output 2028030987837