./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL --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 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:47:22,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:47:22,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:47:22,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:47:22,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:47:22,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:47:22,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:47:22,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:47:22,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:47:22,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:47:22,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:47:22,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:47:22,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:47:22,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:47:22,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:47:22,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:47:22,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:47:22,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:47:22,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:47:22,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:47:22,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:47:22,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:47:22,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:47:22,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:47:22,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:47:22,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:47:22,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:47:22,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:47:22,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:47:22,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:47:22,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:47:22,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:47:22,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:47:22,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:47:22,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:47:22,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:47:22,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:47:22,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:47:22,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:47:22,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:47:22,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:47:22,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:47:22,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:47:22,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:47:22,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:47:22,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:47:22,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:47:22,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:47:22,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:47:22,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:47:22,686 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:47:22,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:47:22,687 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:47:22,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:47:22,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:47:22,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:47:22,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:47:22,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:47:22,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:47:22,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:47:22,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:47:22,689 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:47:22,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:47:22,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:47:22,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:47:22,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:47:22,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:47:22,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:47:22,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:47:22,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:47:22,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:47:22,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:47:22,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:47:22,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:47:22,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:47:22,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:47:22,694 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_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 [2021-11-19 04:47:23,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:47:23,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:47:23,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:47:23,149 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:47:23,150 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:47:23,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-19 04:47:23,231 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/data/958bdc664/2e4814760b2144839392c2c197564407/FLAGb49f9381c [2021-11-19 04:47:24,191 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:47:24,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-19 04:47:24,253 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/data/958bdc664/2e4814760b2144839392c2c197564407/FLAGb49f9381c [2021-11-19 04:47:24,747 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/data/958bdc664/2e4814760b2144839392c2c197564407 [2021-11-19 04:47:24,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:47:24,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:47:24,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:47:24,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:47:24,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:47:24,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:47:24" (1/1) ... [2021-11-19 04:47:24,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15fffd80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:24, skipping insertion in model container [2021-11-19 04:47:24,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:47:24" (1/1) ... [2021-11-19 04:47:24,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:47:24,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:47:25,437 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_dcad14e4-5263-416d-99a1-d8a00626284d/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-19 04:47:25,454 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:47:25,484 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:47:25,691 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_dcad14e4-5263-416d-99a1-d8a00626284d/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-19 04:47:25,694 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:47:25,718 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:47:25,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25 WrapperNode [2021-11-19 04:47:25,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:47:25,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:47:25,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:47:25,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:47:25,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:25,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:25,901 INFO L137 Inliner]: procedures = 32, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 815 [2021-11-19 04:47:25,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:47:25,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:47:25,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:47:25,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:47:25,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:25,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:25,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:25,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:26,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:26,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:26,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:26,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:47:26,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:47:26,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:47:26,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:47:26,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (1/1) ... [2021-11-19 04:47:26,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:47:26,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:26,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:47:26,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:47:26,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:47:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:47:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:47:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:47:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:47:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:47:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:47:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:47:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:47:26,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:47:26,404 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:47:26,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:47:26,447 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:47:29,300 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 04:47:29,300 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 04:47:29,301 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:47:29,312 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:47:29,312 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:47:29,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:47:29 BoogieIcfgContainer [2021-11-19 04:47:29,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:47:29,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:47:29,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:47:29,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:47:29,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:47:24" (1/3) ... [2021-11-19 04:47:29,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73369737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:47:29, skipping insertion in model container [2021-11-19 04:47:29,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:25" (2/3) ... [2021-11-19 04:47:29,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73369737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:47:29, skipping insertion in model container [2021-11-19 04:47:29,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:47:29" (3/3) ... [2021-11-19 04:47:29,327 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-2.c [2021-11-19 04:47:29,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:47:29,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:47:29,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:47:29,408 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:47:29,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:47:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:47:29,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:29,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:29,448 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:29,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash 271453869, now seen corresponding path program 1 times [2021-11-19 04:47:29,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:29,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634008864] [2021-11-19 04:47:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:29,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:29,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:29,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634008864] [2021-11-19 04:47:29,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634008864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:29,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:29,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:29,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25778648] [2021-11-19 04:47:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:29,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:29,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:30,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:30,045 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:31,299 INFO L93 Difference]: Finished difference Result 349 states and 598 transitions. [2021-11-19 04:47:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 04:47:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:31,328 INFO L225 Difference]: With dead ends: 349 [2021-11-19 04:47:31,329 INFO L226 Difference]: Without dead ends: 177 [2021-11-19 04:47:31,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:31,350 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 36 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:31,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 657 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:47:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-19 04:47:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 160. [2021-11-19 04:47:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5911949685534592) internal successors, (253), 159 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 253 transitions. [2021-11-19 04:47:31,412 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 253 transitions. Word has length 47 [2021-11-19 04:47:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:31,413 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 253 transitions. [2021-11-19 04:47:31,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 253 transitions. [2021-11-19 04:47:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 04:47:31,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:31,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:31,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:47:31,418 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:31,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:31,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1171867431, now seen corresponding path program 1 times [2021-11-19 04:47:31,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:31,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444389912] [2021-11-19 04:47:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:31,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:31,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:31,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444389912] [2021-11-19 04:47:31,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444389912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:31,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:31,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:31,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672712647] [2021-11-19 04:47:31,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:31,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:31,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:31,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:31,637 INFO L87 Difference]: Start difference. First operand 160 states and 253 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:32,646 INFO L93 Difference]: Finished difference Result 316 states and 494 transitions. [2021-11-19 04:47:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:32,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-19 04:47:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:32,649 INFO L225 Difference]: With dead ends: 316 [2021-11-19 04:47:32,649 INFO L226 Difference]: Without dead ends: 177 [2021-11-19 04:47:32,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:32,654 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 24 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:32,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 543 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:47:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-19 04:47:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 160. [2021-11-19 04:47:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5849056603773586) internal successors, (252), 159 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 252 transitions. [2021-11-19 04:47:32,672 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 252 transitions. Word has length 60 [2021-11-19 04:47:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:32,672 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 252 transitions. [2021-11-19 04:47:32,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 252 transitions. [2021-11-19 04:47:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:47:32,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:32,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:32,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:47:32,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1586342230, now seen corresponding path program 1 times [2021-11-19 04:47:32,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:32,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700339078] [2021-11-19 04:47:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:32,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:32,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:32,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700339078] [2021-11-19 04:47:32,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700339078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:32,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:32,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:32,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567978338] [2021-11-19 04:47:32,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:32,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:32,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:32,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:32,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:32,784 INFO L87 Difference]: Start difference. First operand 160 states and 252 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:33,695 INFO L93 Difference]: Finished difference Result 315 states and 492 transitions. [2021-11-19 04:47:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:33,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-19 04:47:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:33,698 INFO L225 Difference]: With dead ends: 315 [2021-11-19 04:47:33,699 INFO L226 Difference]: Without dead ends: 176 [2021-11-19 04:47:33,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:33,701 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 28 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:33,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 545 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:47:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-19 04:47:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 160. [2021-11-19 04:47:33,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.578616352201258) internal successors, (251), 159 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 251 transitions. [2021-11-19 04:47:33,734 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 251 transitions. Word has length 61 [2021-11-19 04:47:33,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:33,734 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 251 transitions. [2021-11-19 04:47:33,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 251 transitions. [2021-11-19 04:47:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:47:33,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:33,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:33,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:47:33,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash -748331458, now seen corresponding path program 1 times [2021-11-19 04:47:33,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:33,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541381514] [2021-11-19 04:47:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:33,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:33,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:33,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541381514] [2021-11-19 04:47:33,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541381514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:33,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:33,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:33,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187669591] [2021-11-19 04:47:33,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:33,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:33,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:33,950 INFO L87 Difference]: Start difference. First operand 160 states and 251 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:35,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:35,699 INFO L93 Difference]: Finished difference Result 315 states and 491 transitions. [2021-11-19 04:47:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:35,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-19 04:47:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:35,702 INFO L225 Difference]: With dead ends: 315 [2021-11-19 04:47:35,702 INFO L226 Difference]: Without dead ends: 176 [2021-11-19 04:47:35,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:35,705 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 26 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:35,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 545 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 04:47:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-19 04:47:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 160. [2021-11-19 04:47:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5723270440251573) internal successors, (250), 159 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 250 transitions. [2021-11-19 04:47:35,728 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 250 transitions. Word has length 61 [2021-11-19 04:47:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:35,728 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 250 transitions. [2021-11-19 04:47:35,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 250 transitions. [2021-11-19 04:47:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:47:35,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:35,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:35,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:47:35,742 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:35,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:35,743 INFO L85 PathProgramCache]: Analyzing trace with hash 706199381, now seen corresponding path program 1 times [2021-11-19 04:47:35,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:35,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025383959] [2021-11-19 04:47:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:35,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:35,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:35,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025383959] [2021-11-19 04:47:35,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025383959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:35,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:35,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:35,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956765432] [2021-11-19 04:47:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:35,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:35,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:35,907 INFO L87 Difference]: Start difference. First operand 160 states and 250 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:37,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:37,588 INFO L93 Difference]: Finished difference Result 314 states and 489 transitions. [2021-11-19 04:47:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-19 04:47:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:37,591 INFO L225 Difference]: With dead ends: 314 [2021-11-19 04:47:37,592 INFO L226 Difference]: Without dead ends: 175 [2021-11-19 04:47:37,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:37,594 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 19 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:37,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 547 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:47:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-19 04:47:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 160. [2021-11-19 04:47:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 159 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 249 transitions. [2021-11-19 04:47:37,606 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 249 transitions. Word has length 61 [2021-11-19 04:47:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:37,607 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 249 transitions. [2021-11-19 04:47:37,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 249 transitions. [2021-11-19 04:47:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:47:37,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:37,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:37,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:47:37,611 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash -243148779, now seen corresponding path program 1 times [2021-11-19 04:47:37,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:37,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863360560] [2021-11-19 04:47:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:37,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:37,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:37,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863360560] [2021-11-19 04:47:37,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863360560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:37,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:37,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:37,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201103376] [2021-11-19 04:47:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:37,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:37,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:37,702 INFO L87 Difference]: Start difference. First operand 160 states and 249 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:39,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:40,148 INFO L93 Difference]: Finished difference Result 312 states and 486 transitions. [2021-11-19 04:47:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:40,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-19 04:47:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:40,151 INFO L225 Difference]: With dead ends: 312 [2021-11-19 04:47:40,151 INFO L226 Difference]: Without dead ends: 173 [2021-11-19 04:47:40,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:40,153 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 19 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:40,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:47:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-19 04:47:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2021-11-19 04:47:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.559748427672956) internal successors, (248), 159 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2021-11-19 04:47:40,174 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 61 [2021-11-19 04:47:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:40,174 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2021-11-19 04:47:40,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2021-11-19 04:47:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 04:47:40,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:40,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:40,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:47:40,179 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1989979458, now seen corresponding path program 1 times [2021-11-19 04:47:40,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:40,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759831615] [2021-11-19 04:47:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:40,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:40,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:40,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759831615] [2021-11-19 04:47:40,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759831615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:40,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:40,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:40,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250078670] [2021-11-19 04:47:40,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:40,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:40,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:40,311 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:42,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:42,708 INFO L93 Difference]: Finished difference Result 312 states and 485 transitions. [2021-11-19 04:47:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-19 04:47:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:42,711 INFO L225 Difference]: With dead ends: 312 [2021-11-19 04:47:42,711 INFO L226 Difference]: Without dead ends: 173 [2021-11-19 04:47:42,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:42,713 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 22 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:42,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:47:42,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-19 04:47:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2021-11-19 04:47:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5534591194968554) internal successors, (247), 159 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 247 transitions. [2021-11-19 04:47:42,722 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 247 transitions. Word has length 62 [2021-11-19 04:47:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:42,722 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 247 transitions. [2021-11-19 04:47:42,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 247 transitions. [2021-11-19 04:47:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:47:42,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:42,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:42,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:47:42,726 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash 939475139, now seen corresponding path program 1 times [2021-11-19 04:47:42,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:42,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624760868] [2021-11-19 04:47:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:42,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:42,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:42,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624760868] [2021-11-19 04:47:42,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624760868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:42,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:42,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:42,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987833354] [2021-11-19 04:47:42,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:42,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:42,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:42,858 INFO L87 Difference]: Start difference. First operand 160 states and 247 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:44,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:45,273 INFO L93 Difference]: Finished difference Result 312 states and 484 transitions. [2021-11-19 04:47:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-19 04:47:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:45,276 INFO L225 Difference]: With dead ends: 312 [2021-11-19 04:47:45,276 INFO L226 Difference]: Without dead ends: 173 [2021-11-19 04:47:45,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:45,278 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 20 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:45,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:47:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-19 04:47:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2021-11-19 04:47:45,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5471698113207548) internal successors, (246), 159 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 246 transitions. [2021-11-19 04:47:45,287 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 246 transitions. Word has length 63 [2021-11-19 04:47:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:45,287 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 246 transitions. [2021-11-19 04:47:45,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 246 transitions. [2021-11-19 04:47:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:47:45,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:45,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:45,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:47:45,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1600184473, now seen corresponding path program 1 times [2021-11-19 04:47:45,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:45,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118663985] [2021-11-19 04:47:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:45,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:45,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:45,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118663985] [2021-11-19 04:47:45,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118663985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:45,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:45,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:45,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262840389] [2021-11-19 04:47:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:45,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:45,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:45,410 INFO L87 Difference]: Start difference. First operand 160 states and 246 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:47,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:47,445 INFO L93 Difference]: Finished difference Result 302 states and 470 transitions. [2021-11-19 04:47:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-19 04:47:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:47,448 INFO L225 Difference]: With dead ends: 302 [2021-11-19 04:47:47,448 INFO L226 Difference]: Without dead ends: 163 [2021-11-19 04:47:47,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:47,449 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 11 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:47,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 565 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:47:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-19 04:47:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-11-19 04:47:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5408805031446542) internal successors, (245), 159 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 245 transitions. [2021-11-19 04:47:47,461 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 245 transitions. Word has length 64 [2021-11-19 04:47:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:47,461 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 245 transitions. [2021-11-19 04:47:47,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 245 transitions. [2021-11-19 04:47:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:47:47,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:47,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:47,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:47:47,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1200033073, now seen corresponding path program 1 times [2021-11-19 04:47:47,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:47,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747882741] [2021-11-19 04:47:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:47,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:47,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:47,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747882741] [2021-11-19 04:47:47,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747882741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:47,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:47,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:47,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87123206] [2021-11-19 04:47:47,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:47,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:47,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:47,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:47,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:47,583 INFO L87 Difference]: Start difference. First operand 160 states and 245 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:48,605 INFO L93 Difference]: Finished difference Result 342 states and 531 transitions. [2021-11-19 04:47:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:48,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-19 04:47:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:48,610 INFO L225 Difference]: With dead ends: 342 [2021-11-19 04:47:48,611 INFO L226 Difference]: Without dead ends: 203 [2021-11-19 04:47:48,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:48,612 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 34 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:48,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 563 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:47:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-19 04:47:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 182. [2021-11-19 04:47:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5635359116022098) internal successors, (283), 181 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 283 transitions. [2021-11-19 04:47:48,623 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 283 transitions. Word has length 64 [2021-11-19 04:47:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:48,624 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 283 transitions. [2021-11-19 04:47:48,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 283 transitions. [2021-11-19 04:47:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 04:47:48,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:48,626 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:48,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:47:48,627 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash -517792777, now seen corresponding path program 1 times [2021-11-19 04:47:48,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:48,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142968331] [2021-11-19 04:47:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:48,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:48,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:48,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142968331] [2021-11-19 04:47:48,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142968331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:48,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:48,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:48,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684310018] [2021-11-19 04:47:48,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:48,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:48,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:48,748 INFO L87 Difference]: Start difference. First operand 182 states and 283 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:50,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:50,488 INFO L93 Difference]: Finished difference Result 364 states and 568 transitions. [2021-11-19 04:47:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:50,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-19 04:47:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:50,491 INFO L225 Difference]: With dead ends: 364 [2021-11-19 04:47:50,491 INFO L226 Difference]: Without dead ends: 203 [2021-11-19 04:47:50,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:50,493 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 39 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:50,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 563 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 04:47:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-19 04:47:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 182. [2021-11-19 04:47:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.558011049723757) internal successors, (282), 181 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 282 transitions. [2021-11-19 04:47:50,516 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 282 transitions. Word has length 77 [2021-11-19 04:47:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:50,516 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 282 transitions. [2021-11-19 04:47:50,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 282 transitions. [2021-11-19 04:47:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 04:47:50,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:50,519 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:50,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:47:50,521 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1510102860, now seen corresponding path program 1 times [2021-11-19 04:47:50,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:50,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638453464] [2021-11-19 04:47:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:50,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:50,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:50,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638453464] [2021-11-19 04:47:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638453464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:50,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519339852] [2021-11-19 04:47:50,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:50,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:50,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:50,615 INFO L87 Difference]: Start difference. First operand 182 states and 282 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:52,251 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:52,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:52,625 INFO L93 Difference]: Finished difference Result 363 states and 565 transitions. [2021-11-19 04:47:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:52,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-19 04:47:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:52,628 INFO L225 Difference]: With dead ends: 363 [2021-11-19 04:47:52,628 INFO L226 Difference]: Without dead ends: 202 [2021-11-19 04:47:52,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:52,629 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 43 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:52,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 565 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:47:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-19 04:47:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 182. [2021-11-19 04:47:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5524861878453038) internal successors, (281), 181 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 281 transitions. [2021-11-19 04:47:52,638 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 281 transitions. Word has length 78 [2021-11-19 04:47:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:52,639 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 281 transitions. [2021-11-19 04:47:52,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:52,639 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 281 transitions. [2021-11-19 04:47:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 04:47:52,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:52,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:52,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:47:52,641 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:52,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1946853664, now seen corresponding path program 1 times [2021-11-19 04:47:52,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:52,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897124569] [2021-11-19 04:47:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:52,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:52,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:52,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897124569] [2021-11-19 04:47:52,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897124569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:52,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:52,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:52,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592752764] [2021-11-19 04:47:52,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:52,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:52,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:52,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:52,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:52,715 INFO L87 Difference]: Start difference. First operand 182 states and 281 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:53,820 INFO L93 Difference]: Finished difference Result 363 states and 563 transitions. [2021-11-19 04:47:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:53,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-19 04:47:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:53,823 INFO L225 Difference]: With dead ends: 363 [2021-11-19 04:47:53,823 INFO L226 Difference]: Without dead ends: 202 [2021-11-19 04:47:53,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:53,824 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 41 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:53,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 565 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:47:53,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-19 04:47:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 182. [2021-11-19 04:47:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5469613259668509) internal successors, (280), 181 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) [2021-11-19 04:47:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 280 transitions. [2021-11-19 04:47:53,834 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 280 transitions. Word has length 78 [2021-11-19 04:47:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:53,835 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 280 transitions. [2021-11-19 04:47:53,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 280 transitions. [2021-11-19 04:47:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 04:47:53,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:53,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:53,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:47:53,838 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:53,839 INFO L85 PathProgramCache]: Analyzing trace with hash -492322825, now seen corresponding path program 1 times [2021-11-19 04:47:53,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:53,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806594237] [2021-11-19 04:47:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:53,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:53,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:53,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806594237] [2021-11-19 04:47:53,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806594237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:53,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:53,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:53,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115117066] [2021-11-19 04:47:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:53,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:53,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:53,955 INFO L87 Difference]: Start difference. First operand 182 states and 280 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:55,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:55,869 INFO L93 Difference]: Finished difference Result 362 states and 560 transitions. [2021-11-19 04:47:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:55,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-19 04:47:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:55,872 INFO L225 Difference]: With dead ends: 362 [2021-11-19 04:47:55,872 INFO L226 Difference]: Without dead ends: 201 [2021-11-19 04:47:55,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:55,874 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 34 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:55,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 567 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 04:47:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-19 04:47:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 182. [2021-11-19 04:47:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5414364640883977) internal successors, (279), 181 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 279 transitions. [2021-11-19 04:47:55,883 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 279 transitions. Word has length 78 [2021-11-19 04:47:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:55,884 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 279 transitions. [2021-11-19 04:47:55,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 279 transitions. [2021-11-19 04:47:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 04:47:55,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:55,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:55,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:47:55,887 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1441670985, now seen corresponding path program 1 times [2021-11-19 04:47:55,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:55,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68287224] [2021-11-19 04:47:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:55,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:55,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:55,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68287224] [2021-11-19 04:47:55,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68287224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:55,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:55,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:55,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879864342] [2021-11-19 04:47:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:55,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:55,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:55,965 INFO L87 Difference]: Start difference. First operand 182 states and 279 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:57,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:57,907 INFO L93 Difference]: Finished difference Result 360 states and 556 transitions. [2021-11-19 04:47:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:47:57,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-19 04:47:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:57,909 INFO L225 Difference]: With dead ends: 360 [2021-11-19 04:47:57,910 INFO L226 Difference]: Without dead ends: 199 [2021-11-19 04:47:57,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:47:57,911 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 34 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:57,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 571 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 04:47:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-19 04:47:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 182. [2021-11-19 04:47:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5359116022099448) internal successors, (278), 181 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 278 transitions. [2021-11-19 04:47:57,920 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 278 transitions. Word has length 78 [2021-11-19 04:47:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:57,921 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 278 transitions. [2021-11-19 04:47:57,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 278 transitions. [2021-11-19 04:47:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 04:47:57,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:57,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:57,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:47:57,924 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash -804470560, now seen corresponding path program 1 times [2021-11-19 04:47:57,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:57,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123141317] [2021-11-19 04:47:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:57,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:47:58,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:58,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123141317] [2021-11-19 04:47:58,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123141317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:47:58,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:47:58,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:47:58,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010833681] [2021-11-19 04:47:58,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:47:58,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:47:58,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:47:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:47:58,021 INFO L87 Difference]: Start difference. First operand 182 states and 278 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:00,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:00,358 INFO L93 Difference]: Finished difference Result 360 states and 554 transitions. [2021-11-19 04:48:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:00,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-19 04:48:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:00,361 INFO L225 Difference]: With dead ends: 360 [2021-11-19 04:48:00,361 INFO L226 Difference]: Without dead ends: 199 [2021-11-19 04:48:00,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:00,363 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 37 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:00,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 571 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:48:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-19 04:48:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 182. [2021-11-19 04:48:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5303867403314917) internal successors, (277), 181 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 277 transitions. [2021-11-19 04:48:00,379 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 277 transitions. Word has length 79 [2021-11-19 04:48:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:00,380 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 277 transitions. [2021-11-19 04:48:00,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 277 transitions. [2021-11-19 04:48:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 04:48:00,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:00,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:00,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:48:00,383 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash 210870501, now seen corresponding path program 1 times [2021-11-19 04:48:00,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:00,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200733441] [2021-11-19 04:48:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:00,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:48:00,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:00,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200733441] [2021-11-19 04:48:00,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200733441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:00,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:00,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:00,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834208420] [2021-11-19 04:48:00,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:00,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:00,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:00,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:00,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:00,466 INFO L87 Difference]: Start difference. First operand 182 states and 277 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:02,479 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:02,797 INFO L93 Difference]: Finished difference Result 360 states and 552 transitions. [2021-11-19 04:48:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-19 04:48:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:02,800 INFO L225 Difference]: With dead ends: 360 [2021-11-19 04:48:02,800 INFO L226 Difference]: Without dead ends: 199 [2021-11-19 04:48:02,801 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 [2021-11-19 04:48:02,802 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 35 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:02,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 571 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:48:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-19 04:48:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 182. [2021-11-19 04:48:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5248618784530388) internal successors, (276), 181 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 276 transitions. [2021-11-19 04:48:02,810 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 276 transitions. Word has length 80 [2021-11-19 04:48:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:02,810 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 276 transitions. [2021-11-19 04:48:02,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 276 transitions. [2021-11-19 04:48:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 04:48:02,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:02,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:02,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:48:02,813 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:02,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1582875525, now seen corresponding path program 1 times [2021-11-19 04:48:02,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:02,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266711897] [2021-11-19 04:48:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:02,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:48:02,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:02,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266711897] [2021-11-19 04:48:02,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266711897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:02,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:02,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:02,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837637872] [2021-11-19 04:48:02,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:02,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:02,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:02,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:02,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:02,885 INFO L87 Difference]: Start difference. First operand 182 states and 276 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:04,895 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:05,170 INFO L93 Difference]: Finished difference Result 350 states and 537 transitions. [2021-11-19 04:48:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:05,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-19 04:48:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:05,172 INFO L225 Difference]: With dead ends: 350 [2021-11-19 04:48:05,172 INFO L226 Difference]: Without dead ends: 189 [2021-11-19 04:48:05,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:05,173 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 26 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:05,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 585 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:48:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-19 04:48:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2021-11-19 04:48:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5193370165745856) internal successors, (275), 181 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 275 transitions. [2021-11-19 04:48:05,181 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 275 transitions. Word has length 81 [2021-11-19 04:48:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:05,182 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 275 transitions. [2021-11-19 04:48:05,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 275 transitions. [2021-11-19 04:48:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 04:48:05,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:05,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:05,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:48:05,184 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:05,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:05,185 INFO L85 PathProgramCache]: Analyzing trace with hash -348818330, now seen corresponding path program 1 times [2021-11-19 04:48:05,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:05,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042845315] [2021-11-19 04:48:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:05,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:05,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:05,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042845315] [2021-11-19 04:48:05,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042845315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:05,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:05,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:05,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559847974] [2021-11-19 04:48:05,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:05,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:05,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:05,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:05,265 INFO L87 Difference]: Start difference. First operand 182 states and 275 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:06,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:07,323 INFO L93 Difference]: Finished difference Result 459 states and 708 transitions. [2021-11-19 04:48:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:07,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-19 04:48:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:07,327 INFO L225 Difference]: With dead ends: 459 [2021-11-19 04:48:07,327 INFO L226 Difference]: Without dead ends: 298 [2021-11-19 04:48:07,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:07,329 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 113 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:07,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 545 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:48:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-19 04:48:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 223. [2021-11-19 04:48:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.572072072072072) internal successors, (349), 222 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 349 transitions. [2021-11-19 04:48:07,341 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 349 transitions. Word has length 86 [2021-11-19 04:48:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:07,342 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 349 transitions. [2021-11-19 04:48:07,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 349 transitions. [2021-11-19 04:48:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 04:48:07,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:07,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:07,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:48:07,345 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1246211608, now seen corresponding path program 1 times [2021-11-19 04:48:07,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:07,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938013980] [2021-11-19 04:48:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:07,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:07,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:07,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938013980] [2021-11-19 04:48:07,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938013980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:07,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:07,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:07,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363763830] [2021-11-19 04:48:07,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:07,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:07,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:07,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:07,436 INFO L87 Difference]: Start difference. First operand 223 states and 349 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:09,445 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:09,781 INFO L93 Difference]: Finished difference Result 475 states and 750 transitions. [2021-11-19 04:48:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:09,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-19 04:48:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:09,784 INFO L225 Difference]: With dead ends: 475 [2021-11-19 04:48:09,784 INFO L226 Difference]: Without dead ends: 273 [2021-11-19 04:48:09,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:09,786 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 42 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:09,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 675 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:48:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-19 04:48:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 247. [2021-11-19 04:48:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.589430894308943) internal successors, (391), 246 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 391 transitions. [2021-11-19 04:48:09,795 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 391 transitions. Word has length 86 [2021-11-19 04:48:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:09,795 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 391 transitions. [2021-11-19 04:48:09,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 391 transitions. [2021-11-19 04:48:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 04:48:09,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:09,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:09,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:48:09,798 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2120868205, now seen corresponding path program 1 times [2021-11-19 04:48:09,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:09,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906407810] [2021-11-19 04:48:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:09,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:09,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:09,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906407810] [2021-11-19 04:48:09,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906407810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:09,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:09,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:09,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193205818] [2021-11-19 04:48:09,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:09,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:09,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:09,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:09,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:09,882 INFO L87 Difference]: Start difference. First operand 247 states and 391 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:11,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:12,299 INFO L93 Difference]: Finished difference Result 538 states and 850 transitions. [2021-11-19 04:48:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:12,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-19 04:48:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:12,302 INFO L225 Difference]: With dead ends: 538 [2021-11-19 04:48:12,302 INFO L226 Difference]: Without dead ends: 312 [2021-11-19 04:48:12,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:12,304 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 98 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:12,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 521 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-19 04:48:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 248. [2021-11-19 04:48:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5870445344129556) internal successors, (392), 247 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 392 transitions. [2021-11-19 04:48:12,315 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 392 transitions. Word has length 87 [2021-11-19 04:48:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:12,316 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 392 transitions. [2021-11-19 04:48:12,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 392 transitions. [2021-11-19 04:48:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 04:48:12,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:12,319 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:12,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 04:48:12,319 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash -61724736, now seen corresponding path program 1 times [2021-11-19 04:48:12,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:12,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986610404] [2021-11-19 04:48:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:12,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:12,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:12,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986610404] [2021-11-19 04:48:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986610404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:12,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:12,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:12,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209297863] [2021-11-19 04:48:12,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:12,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:12,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:12,403 INFO L87 Difference]: Start difference. First operand 248 states and 392 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:14,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:14,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:14,830 INFO L93 Difference]: Finished difference Result 539 states and 850 transitions. [2021-11-19 04:48:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:14,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-19 04:48:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:14,834 INFO L225 Difference]: With dead ends: 539 [2021-11-19 04:48:14,834 INFO L226 Difference]: Without dead ends: 312 [2021-11-19 04:48:14,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:14,836 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 121 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:14,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 523 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-19 04:48:14,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 248. [2021-11-19 04:48:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.582995951417004) internal successors, (391), 247 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 391 transitions. [2021-11-19 04:48:14,847 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 391 transitions. Word has length 99 [2021-11-19 04:48:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:14,848 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 391 transitions. [2021-11-19 04:48:14,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 391 transitions. [2021-11-19 04:48:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 04:48:14,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:14,850 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:14,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 04:48:14,851 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash -21049986, now seen corresponding path program 1 times [2021-11-19 04:48:14,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:14,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872011124] [2021-11-19 04:48:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:14,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:14,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:14,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872011124] [2021-11-19 04:48:14,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872011124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:14,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:14,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:14,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171941073] [2021-11-19 04:48:14,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:14,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:14,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:14,969 INFO L87 Difference]: Start difference. First operand 248 states and 391 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:16,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:17,204 INFO L93 Difference]: Finished difference Result 501 states and 791 transitions. [2021-11-19 04:48:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-19 04:48:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:17,207 INFO L225 Difference]: With dead ends: 501 [2021-11-19 04:48:17,208 INFO L226 Difference]: Without dead ends: 274 [2021-11-19 04:48:17,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:17,209 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 49 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:17,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 675 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 04:48:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-19 04:48:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 248. [2021-11-19 04:48:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5789473684210527) internal successors, (390), 247 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 390 transitions. [2021-11-19 04:48:17,220 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 390 transitions. Word has length 99 [2021-11-19 04:48:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:17,221 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 390 transitions. [2021-11-19 04:48:17,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 390 transitions. [2021-11-19 04:48:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:48:17,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:17,223 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:17,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 04:48:17,224 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1531657053, now seen corresponding path program 1 times [2021-11-19 04:48:17,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:17,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648280578] [2021-11-19 04:48:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:17,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:17,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:17,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648280578] [2021-11-19 04:48:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648280578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:17,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:17,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:17,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517138179] [2021-11-19 04:48:17,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:17,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:17,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:17,318 INFO L87 Difference]: Start difference. First operand 248 states and 390 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:18,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:19,292 INFO L93 Difference]: Finished difference Result 538 states and 845 transitions. [2021-11-19 04:48:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:19,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-19 04:48:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:19,296 INFO L225 Difference]: With dead ends: 538 [2021-11-19 04:48:19,296 INFO L226 Difference]: Without dead ends: 311 [2021-11-19 04:48:19,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:19,298 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 125 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:19,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 521 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:48:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-19 04:48:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 248. [2021-11-19 04:48:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5748987854251013) internal successors, (389), 247 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 389 transitions. [2021-11-19 04:48:19,310 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 389 transitions. Word has length 100 [2021-11-19 04:48:19,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:19,310 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 389 transitions. [2021-11-19 04:48:19,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 389 transitions. [2021-11-19 04:48:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:48:19,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:19,313 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:19,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 04:48:19,313 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:19,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash -693646281, now seen corresponding path program 1 times [2021-11-19 04:48:19,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:19,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239732059] [2021-11-19 04:48:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:19,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:48:19,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:19,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239732059] [2021-11-19 04:48:19,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239732059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:19,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:19,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:48:19,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551900531] [2021-11-19 04:48:19,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:19,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:48:19,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:19,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:48:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:19,428 INFO L87 Difference]: Start difference. First operand 248 states and 389 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:22,115 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:22,579 INFO L93 Difference]: Finished difference Result 496 states and 783 transitions. [2021-11-19 04:48:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:48:22,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-19 04:48:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:22,582 INFO L225 Difference]: With dead ends: 496 [2021-11-19 04:48:22,582 INFO L226 Difference]: Without dead ends: 269 [2021-11-19 04:48:22,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:48:22,584 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 170 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:22,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 432 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 311 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 04:48:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-19 04:48:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2021-11-19 04:48:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.554307116104869) internal successors, (415), 267 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 415 transitions. [2021-11-19 04:48:22,595 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 415 transitions. Word has length 100 [2021-11-19 04:48:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:22,596 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 415 transitions. [2021-11-19 04:48:22,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 415 transitions. [2021-11-19 04:48:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:48:22,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:22,598 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:22,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:48:22,599 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash 760884558, now seen corresponding path program 1 times [2021-11-19 04:48:22,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:22,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787040800] [2021-11-19 04:48:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:22,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:22,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:22,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787040800] [2021-11-19 04:48:22,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787040800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:22,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:22,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:22,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397259215] [2021-11-19 04:48:22,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:22,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:22,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:22,675 INFO L87 Difference]: Start difference. First operand 268 states and 415 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:24,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:25,130 INFO L93 Difference]: Finished difference Result 577 states and 893 transitions. [2021-11-19 04:48:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-19 04:48:25,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:25,133 INFO L225 Difference]: With dead ends: 577 [2021-11-19 04:48:25,133 INFO L226 Difference]: Without dead ends: 330 [2021-11-19 04:48:25,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:25,135 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 117 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:25,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 525 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-19 04:48:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 268. [2021-11-19 04:48:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.550561797752809) internal successors, (414), 267 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 414 transitions. [2021-11-19 04:48:25,147 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 414 transitions. Word has length 100 [2021-11-19 04:48:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:25,147 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 414 transitions. [2021-11-19 04:48:25,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 414 transitions. [2021-11-19 04:48:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:48:25,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:25,150 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:25,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 04:48:25,150 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:25,151 INFO L85 PathProgramCache]: Analyzing trace with hash -188463602, now seen corresponding path program 1 times [2021-11-19 04:48:25,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:25,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373640709] [2021-11-19 04:48:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:25,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:25,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:25,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373640709] [2021-11-19 04:48:25,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373640709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:25,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:25,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:25,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335880204] [2021-11-19 04:48:25,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:25,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:25,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:25,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:25,224 INFO L87 Difference]: Start difference. First operand 268 states and 414 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:26,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:27,136 INFO L93 Difference]: Finished difference Result 575 states and 889 transitions. [2021-11-19 04:48:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-19 04:48:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:27,139 INFO L225 Difference]: With dead ends: 575 [2021-11-19 04:48:27,140 INFO L226 Difference]: Without dead ends: 328 [2021-11-19 04:48:27,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:27,141 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 117 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:27,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 529 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 04:48:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-19 04:48:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2021-11-19 04:48:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.546816479400749) internal successors, (413), 267 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 413 transitions. [2021-11-19 04:48:27,155 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 413 transitions. Word has length 100 [2021-11-19 04:48:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:27,156 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 413 transitions. [2021-11-19 04:48:27,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 413 transitions. [2021-11-19 04:48:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:48:27,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:27,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:27,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 04:48:27,160 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2021801808, now seen corresponding path program 1 times [2021-11-19 04:48:27,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:27,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537886018] [2021-11-19 04:48:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:27,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:27,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:27,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537886018] [2021-11-19 04:48:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537886018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:27,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:27,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:27,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649639981] [2021-11-19 04:48:27,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:27,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:27,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:27,237 INFO L87 Difference]: Start difference. First operand 268 states and 413 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:29,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:29,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:29,397 INFO L93 Difference]: Finished difference Result 539 states and 832 transitions. [2021-11-19 04:48:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:29,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-19 04:48:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:29,400 INFO L225 Difference]: With dead ends: 539 [2021-11-19 04:48:29,400 INFO L226 Difference]: Without dead ends: 292 [2021-11-19 04:48:29,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:29,402 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 45 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:29,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 665 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 04:48:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-19 04:48:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 268. [2021-11-19 04:48:29,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5430711610486891) internal successors, (412), 267 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 412 transitions. [2021-11-19 04:48:29,414 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 412 transitions. Word has length 100 [2021-11-19 04:48:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:29,414 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 412 transitions. [2021-11-19 04:48:29,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 412 transitions. [2021-11-19 04:48:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:48:29,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:29,416 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:29,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 04:48:29,417 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1072453648, now seen corresponding path program 1 times [2021-11-19 04:48:29,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:29,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980857605] [2021-11-19 04:48:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:29,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:29,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:29,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980857605] [2021-11-19 04:48:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980857605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:29,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:29,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:29,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936357869] [2021-11-19 04:48:29,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:29,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:29,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:29,494 INFO L87 Difference]: Start difference. First operand 268 states and 412 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:31,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:31,884 INFO L93 Difference]: Finished difference Result 537 states and 828 transitions. [2021-11-19 04:48:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:31,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-19 04:48:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:31,887 INFO L225 Difference]: With dead ends: 537 [2021-11-19 04:48:31,888 INFO L226 Difference]: Without dead ends: 290 [2021-11-19 04:48:31,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:31,889 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 45 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:31,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 669 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-19 04:48:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 268. [2021-11-19 04:48:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5393258426966292) internal successors, (411), 267 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 411 transitions. [2021-11-19 04:48:31,908 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 411 transitions. Word has length 100 [2021-11-19 04:48:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:31,909 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 411 transitions. [2021-11-19 04:48:31,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 411 transitions. [2021-11-19 04:48:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 04:48:31,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:31,911 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:31,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 04:48:31,911 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:31,912 INFO L85 PathProgramCache]: Analyzing trace with hash 262548316, now seen corresponding path program 1 times [2021-11-19 04:48:31,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:31,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056973246] [2021-11-19 04:48:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:31,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:31,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:31,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056973246] [2021-11-19 04:48:31,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056973246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:31,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:31,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:31,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471267979] [2021-11-19 04:48:31,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:31,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:31,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:31,997 INFO L87 Difference]: Start difference. First operand 268 states and 411 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:34,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:34,441 INFO L93 Difference]: Finished difference Result 575 states and 883 transitions. [2021-11-19 04:48:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-19 04:48:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:34,444 INFO L225 Difference]: With dead ends: 575 [2021-11-19 04:48:34,444 INFO L226 Difference]: Without dead ends: 328 [2021-11-19 04:48:34,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:34,446 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 121 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:34,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 553 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-19 04:48:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2021-11-19 04:48:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5355805243445693) internal successors, (410), 267 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 410 transitions. [2021-11-19 04:48:34,459 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 410 transitions. Word has length 101 [2021-11-19 04:48:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:34,459 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 410 transitions. [2021-11-19 04:48:34,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 410 transitions. [2021-11-19 04:48:34,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 04:48:34,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:34,461 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:34,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 04:48:34,462 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 696277402, now seen corresponding path program 1 times [2021-11-19 04:48:34,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:34,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430520661] [2021-11-19 04:48:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:34,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:34,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:34,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430520661] [2021-11-19 04:48:34,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430520661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:34,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:34,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:34,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579415278] [2021-11-19 04:48:34,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:34,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:34,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:34,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:34,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:34,573 INFO L87 Difference]: Start difference. First operand 268 states and 410 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:36,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:36,977 INFO L93 Difference]: Finished difference Result 537 states and 824 transitions. [2021-11-19 04:48:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:36,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-19 04:48:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:36,981 INFO L225 Difference]: With dead ends: 537 [2021-11-19 04:48:36,981 INFO L226 Difference]: Without dead ends: 290 [2021-11-19 04:48:36,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:36,982 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 49 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:36,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 667 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-19 04:48:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 268. [2021-11-19 04:48:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5318352059925093) internal successors, (409), 267 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 409 transitions. [2021-11-19 04:48:36,994 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 409 transitions. Word has length 101 [2021-11-19 04:48:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:36,994 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 409 transitions. [2021-11-19 04:48:36,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 409 transitions. [2021-11-19 04:48:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 04:48:36,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:36,996 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:36,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 04:48:36,997 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1431552150, now seen corresponding path program 1 times [2021-11-19 04:48:36,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:36,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781002108] [2021-11-19 04:48:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:36,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:37,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:37,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781002108] [2021-11-19 04:48:37,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781002108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:37,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:37,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:37,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581411328] [2021-11-19 04:48:37,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:37,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:37,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:37,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:37,075 INFO L87 Difference]: Start difference. First operand 268 states and 409 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:39,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:39,546 INFO L93 Difference]: Finished difference Result 575 states and 879 transitions. [2021-11-19 04:48:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-19 04:48:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:39,549 INFO L225 Difference]: With dead ends: 575 [2021-11-19 04:48:39,549 INFO L226 Difference]: Without dead ends: 328 [2021-11-19 04:48:39,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:39,550 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 119 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:39,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 553 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-19 04:48:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2021-11-19 04:48:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5280898876404494) internal successors, (408), 267 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 408 transitions. [2021-11-19 04:48:39,564 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 408 transitions. Word has length 102 [2021-11-19 04:48:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:39,564 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 408 transitions. [2021-11-19 04:48:39,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 408 transitions. [2021-11-19 04:48:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 04:48:39,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:39,566 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:39,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 04:48:39,567 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -870852372, now seen corresponding path program 1 times [2021-11-19 04:48:39,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:39,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049369787] [2021-11-19 04:48:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:39,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:39,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:39,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049369787] [2021-11-19 04:48:39,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049369787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:39,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:39,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:39,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927416575] [2021-11-19 04:48:39,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:39,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:39,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:39,650 INFO L87 Difference]: Start difference. First operand 268 states and 408 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:41,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:42,030 INFO L93 Difference]: Finished difference Result 537 states and 820 transitions. [2021-11-19 04:48:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:42,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-19 04:48:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:42,034 INFO L225 Difference]: With dead ends: 537 [2021-11-19 04:48:42,034 INFO L226 Difference]: Without dead ends: 290 [2021-11-19 04:48:42,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:42,036 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 47 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:42,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 665 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-19 04:48:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 268. [2021-11-19 04:48:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5243445692883895) internal successors, (407), 267 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 407 transitions. [2021-11-19 04:48:42,074 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 407 transitions. Word has length 102 [2021-11-19 04:48:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:42,074 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 407 transitions. [2021-11-19 04:48:42,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 407 transitions. [2021-11-19 04:48:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:48:42,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:42,076 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:42,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 04:48:42,077 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:42,078 INFO L85 PathProgramCache]: Analyzing trace with hash 683207607, now seen corresponding path program 1 times [2021-11-19 04:48:42,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:42,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402767272] [2021-11-19 04:48:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:42,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:42,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:42,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402767272] [2021-11-19 04:48:42,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402767272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:42,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:42,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:42,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132011194] [2021-11-19 04:48:42,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:42,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:42,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:42,187 INFO L87 Difference]: Start difference. First operand 268 states and 407 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:44,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:44,628 INFO L93 Difference]: Finished difference Result 575 states and 875 transitions. [2021-11-19 04:48:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-19 04:48:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:44,631 INFO L225 Difference]: With dead ends: 575 [2021-11-19 04:48:44,632 INFO L226 Difference]: Without dead ends: 328 [2021-11-19 04:48:44,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:44,633 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 117 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:44,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 553 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-19 04:48:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2021-11-19 04:48:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5205992509363295) internal successors, (406), 267 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 406 transitions. [2021-11-19 04:48:44,646 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 406 transitions. Word has length 103 [2021-11-19 04:48:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:44,647 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 406 transitions. [2021-11-19 04:48:44,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 406 transitions. [2021-11-19 04:48:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:48:44,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:44,649 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:44,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-19 04:48:44,650 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash 885031541, now seen corresponding path program 1 times [2021-11-19 04:48:44,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:44,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440185805] [2021-11-19 04:48:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:44,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:44,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:44,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440185805] [2021-11-19 04:48:44,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440185805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:44,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:44,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:44,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312490686] [2021-11-19 04:48:44,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:44,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:44,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:44,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:44,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:44,731 INFO L87 Difference]: Start difference. First operand 268 states and 406 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:46,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:47,117 INFO L93 Difference]: Finished difference Result 537 states and 816 transitions. [2021-11-19 04:48:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:47,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-19 04:48:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:47,120 INFO L225 Difference]: With dead ends: 537 [2021-11-19 04:48:47,120 INFO L226 Difference]: Without dead ends: 290 [2021-11-19 04:48:47,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:47,122 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 45 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:47,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 663 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-19 04:48:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 268. [2021-11-19 04:48:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5168539325842696) internal successors, (405), 267 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 405 transitions. [2021-11-19 04:48:47,137 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 405 transitions. Word has length 103 [2021-11-19 04:48:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:47,138 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 405 transitions. [2021-11-19 04:48:47,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 405 transitions. [2021-11-19 04:48:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 04:48:47,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:47,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:47,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-19 04:48:47,140 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash 613549989, now seen corresponding path program 1 times [2021-11-19 04:48:47,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:47,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043321309] [2021-11-19 04:48:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:47,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:47,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:47,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043321309] [2021-11-19 04:48:47,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043321309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:47,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:47,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:47,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810890952] [2021-11-19 04:48:47,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:47,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:47,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:47,224 INFO L87 Difference]: Start difference. First operand 268 states and 405 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:48,923 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:49,372 INFO L93 Difference]: Finished difference Result 565 states and 859 transitions. [2021-11-19 04:48:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-19 04:48:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:49,374 INFO L225 Difference]: With dead ends: 565 [2021-11-19 04:48:49,375 INFO L226 Difference]: Without dead ends: 318 [2021-11-19 04:48:49,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:49,376 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 108 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:49,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 541 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 04:48:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-19 04:48:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 268. [2021-11-19 04:48:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5131086142322097) internal successors, (404), 267 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 404 transitions. [2021-11-19 04:48:49,390 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 404 transitions. Word has length 104 [2021-11-19 04:48:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:49,391 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 404 transitions. [2021-11-19 04:48:49,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 404 transitions. [2021-11-19 04:48:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 04:48:49,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:49,393 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:49,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-19 04:48:49,393 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1719842649, now seen corresponding path program 1 times [2021-11-19 04:48:49,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:49,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342025391] [2021-11-19 04:48:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:49,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:49,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:49,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342025391] [2021-11-19 04:48:49,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342025391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:49,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:49,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:49,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890811859] [2021-11-19 04:48:49,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:49,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:49,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:49,476 INFO L87 Difference]: Start difference. First operand 268 states and 404 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:51,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:51,787 INFO L93 Difference]: Finished difference Result 527 states and 800 transitions. [2021-11-19 04:48:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-19 04:48:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:51,790 INFO L225 Difference]: With dead ends: 527 [2021-11-19 04:48:51,790 INFO L226 Difference]: Without dead ends: 280 [2021-11-19 04:48:51,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:51,791 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 36 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:51,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 649 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:48:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-19 04:48:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 268. [2021-11-19 04:48:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5093632958801497) internal successors, (403), 267 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 403 transitions. [2021-11-19 04:48:51,803 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 403 transitions. Word has length 104 [2021-11-19 04:48:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:51,803 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 403 transitions. [2021-11-19 04:48:51,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 403 transitions. [2021-11-19 04:48:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 04:48:51,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:51,805 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:51,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-19 04:48:51,806 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:51,807 INFO L85 PathProgramCache]: Analyzing trace with hash 897867755, now seen corresponding path program 1 times [2021-11-19 04:48:51,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:51,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384679539] [2021-11-19 04:48:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:51,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:48:51,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:51,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384679539] [2021-11-19 04:48:51,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384679539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:51,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:51,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:51,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14405649] [2021-11-19 04:48:51,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:51,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:51,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:51,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:51,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:51,893 INFO L87 Difference]: Start difference. First operand 268 states and 403 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:53,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:54,303 INFO L93 Difference]: Finished difference Result 565 states and 855 transitions. [2021-11-19 04:48:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:54,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-19 04:48:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:54,305 INFO L225 Difference]: With dead ends: 565 [2021-11-19 04:48:54,305 INFO L226 Difference]: Without dead ends: 318 [2021-11-19 04:48:54,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:54,307 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 98 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:54,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 557 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-19 04:48:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 268. [2021-11-19 04:48:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5056179775280898) internal successors, (402), 267 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 402 transitions. [2021-11-19 04:48:54,319 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 402 transitions. Word has length 108 [2021-11-19 04:48:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:54,320 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 402 transitions. [2021-11-19 04:48:54,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 402 transitions. [2021-11-19 04:48:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 04:48:54,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:54,322 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:54,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-19 04:48:54,323 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:54,323 INFO L85 PathProgramCache]: Analyzing trace with hash -788312083, now seen corresponding path program 1 times [2021-11-19 04:48:54,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:54,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508468431] [2021-11-19 04:48:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:54,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:48:54,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:54,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508468431] [2021-11-19 04:48:54,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508468431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:54,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:54,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:48:54,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224771941] [2021-11-19 04:48:54,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:54,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:48:54,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:54,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:48:54,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:48:54,423 INFO L87 Difference]: Start difference. First operand 268 states and 402 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:54,543 INFO L93 Difference]: Finished difference Result 759 states and 1154 transitions. [2021-11-19 04:48:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:48:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-19 04:48:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:54,547 INFO L225 Difference]: With dead ends: 759 [2021-11-19 04:48:54,548 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 04:48:54,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:48:54,550 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 149 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:54,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 446 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:48:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 04:48:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-11-19 04:48:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.477495107632094) internal successors, (755), 511 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 755 transitions. [2021-11-19 04:48:54,571 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 755 transitions. Word has length 108 [2021-11-19 04:48:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:54,572 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 755 transitions. [2021-11-19 04:48:54,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 755 transitions. [2021-11-19 04:48:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 04:48:54,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:54,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:54,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-19 04:48:54,575 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:54,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2004465809, now seen corresponding path program 1 times [2021-11-19 04:48:54,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:54,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297706453] [2021-11-19 04:48:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:54,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 04:48:54,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:54,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297706453] [2021-11-19 04:48:54,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297706453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:54,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:54,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:48:54,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017101755] [2021-11-19 04:48:54,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:54,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:48:54,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:54,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:48:54,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:48:54,643 INFO L87 Difference]: Start difference. First operand 512 states and 755 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:54,725 INFO L93 Difference]: Finished difference Result 1030 states and 1522 transitions. [2021-11-19 04:48:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:48:54,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-19 04:48:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:54,730 INFO L225 Difference]: With dead ends: 1030 [2021-11-19 04:48:54,730 INFO L226 Difference]: Without dead ends: 539 [2021-11-19 04:48:54,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:48:54,736 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:54,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 434 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:48:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-19 04:48:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-19 04:48:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.4684014869888475) internal successors, (790), 538 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 790 transitions. [2021-11-19 04:48:54,759 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 790 transitions. Word has length 108 [2021-11-19 04:48:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:54,759 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 790 transitions. [2021-11-19 04:48:54,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 790 transitions. [2021-11-19 04:48:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 04:48:54,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:54,762 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:54,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-19 04:48:54,763 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:54,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1704225265, now seen corresponding path program 1 times [2021-11-19 04:48:54,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:54,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062140452] [2021-11-19 04:48:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:54,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 04:48:54,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:54,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062140452] [2021-11-19 04:48:54,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062140452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:54,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:54,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:48:54,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224283905] [2021-11-19 04:48:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:54,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:48:54,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:48:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:48:54,826 INFO L87 Difference]: Start difference. First operand 539 states and 790 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:54,883 INFO L93 Difference]: Finished difference Result 1059 states and 1558 transitions. [2021-11-19 04:48:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:48:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-19 04:48:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:54,886 INFO L225 Difference]: With dead ends: 1059 [2021-11-19 04:48:54,886 INFO L226 Difference]: Without dead ends: 541 [2021-11-19 04:48:54,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:48:54,888 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:54,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 413 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:48:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-19 04:48:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-19 04:48:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.4666666666666666) internal successors, (792), 540 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 792 transitions. [2021-11-19 04:48:54,911 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 792 transitions. Word has length 108 [2021-11-19 04:48:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:54,911 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 792 transitions. [2021-11-19 04:48:54,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 792 transitions. [2021-11-19 04:48:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 04:48:54,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:54,914 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:54,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-19 04:48:54,915 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1158688151, now seen corresponding path program 1 times [2021-11-19 04:48:54,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:54,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253714621] [2021-11-19 04:48:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:54,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 04:48:55,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:55,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253714621] [2021-11-19 04:48:55,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253714621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:55,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:55,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:48:55,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807664390] [2021-11-19 04:48:55,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:55,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:48:55,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:48:55,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:48:55,014 INFO L87 Difference]: Start difference. First operand 541 states and 792 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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) [2021-11-19 04:48:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:55,177 INFO L93 Difference]: Finished difference Result 1303 states and 1932 transitions. [2021-11-19 04:48:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:48:55,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 110 [2021-11-19 04:48:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:55,182 INFO L225 Difference]: With dead ends: 1303 [2021-11-19 04:48:55,182 INFO L226 Difference]: Without dead ends: 785 [2021-11-19 04:48:55,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:48:55,184 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 154 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:55,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 594 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:48:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-11-19 04:48:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2021-11-19 04:48:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.4604591836734695) internal successors, (1145), 784 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1145 transitions. [2021-11-19 04:48:55,216 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1145 transitions. Word has length 110 [2021-11-19 04:48:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:55,217 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1145 transitions. [2021-11-19 04:48:55,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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) [2021-11-19 04:48:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1145 transitions. [2021-11-19 04:48:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 04:48:55,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:55,223 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:55,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-19 04:48:55,224 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1332173640, now seen corresponding path program 1 times [2021-11-19 04:48:55,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:55,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639668473] [2021-11-19 04:48:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:55,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:48:55,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:55,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639668473] [2021-11-19 04:48:55,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639668473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:55,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:55,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:55,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679788405] [2021-11-19 04:48:55,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:55,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:55,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:55,325 INFO L87 Difference]: Start difference. First operand 785 states and 1145 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:57,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:57,787 INFO L93 Difference]: Finished difference Result 1736 states and 2551 transitions. [2021-11-19 04:48:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:57,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-19 04:48:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:57,795 INFO L225 Difference]: With dead ends: 1736 [2021-11-19 04:48:57,796 INFO L226 Difference]: Without dead ends: 974 [2021-11-19 04:48:57,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:57,799 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 55 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:57,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 689 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:48:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-19 04:48:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 869. [2021-11-19 04:48:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.4884792626728112) internal successors, (1292), 868 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1292 transitions. [2021-11-19 04:48:57,844 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1292 transitions. Word has length 139 [2021-11-19 04:48:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:57,848 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1292 transitions. [2021-11-19 04:48:57,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1292 transitions. [2021-11-19 04:48:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 04:48:57,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:57,852 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:57,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-19 04:48:57,853 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1488060446, now seen corresponding path program 1 times [2021-11-19 04:48:57,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:57,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556279453] [2021-11-19 04:48:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:57,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:48:57,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:57,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556279453] [2021-11-19 04:48:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556279453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:57,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:57,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:57,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23412969] [2021-11-19 04:48:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:57,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:57,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:57,967 INFO L87 Difference]: Start difference. First operand 869 states and 1292 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:59,314 INFO L93 Difference]: Finished difference Result 1820 states and 2695 transitions. [2021-11-19 04:48:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 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 152 [2021-11-19 04:48:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:59,322 INFO L225 Difference]: With dead ends: 1820 [2021-11-19 04:48:59,322 INFO L226 Difference]: Without dead ends: 974 [2021-11-19 04:48:59,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:48:59,324 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 66 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:59,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 689 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 04:48:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-19 04:48:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 869. [2021-11-19 04:48:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.4850230414746544) internal successors, (1289), 868 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1289 transitions. [2021-11-19 04:48:59,360 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1289 transitions. Word has length 152 [2021-11-19 04:48:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:59,361 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1289 transitions. [2021-11-19 04:48:59,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1289 transitions. [2021-11-19 04:48:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 04:48:59,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:59,364 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:59,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-19 04:48:59,365 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:59,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1559584944, now seen corresponding path program 1 times [2021-11-19 04:48:59,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:59,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683850376] [2021-11-19 04:48:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:59,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:48:59,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:59,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683850376] [2021-11-19 04:48:59,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683850376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:59,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:59,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:59,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311774490] [2021-11-19 04:48:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:59,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:59,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:59,460 INFO L87 Difference]: Start difference. First operand 869 states and 1289 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:01,471 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:01,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:01,811 INFO L93 Difference]: Finished difference Result 1817 states and 2686 transitions. [2021-11-19 04:49:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:01,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-19 04:49:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:01,818 INFO L225 Difference]: With dead ends: 1817 [2021-11-19 04:49:01,819 INFO L226 Difference]: Without dead ends: 971 [2021-11-19 04:49:01,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:01,821 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 63 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:01,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 687 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:49:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-11-19 04:49:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 869. [2021-11-19 04:49:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.4815668202764978) internal successors, (1286), 868 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1286 transitions. [2021-11-19 04:49:01,854 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1286 transitions. Word has length 153 [2021-11-19 04:49:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:01,854 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1286 transitions. [2021-11-19 04:49:01,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1286 transitions. [2021-11-19 04:49:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 04:49:01,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:01,858 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:01,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-19 04:49:01,858 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash 610236784, now seen corresponding path program 1 times [2021-11-19 04:49:01,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:01,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038988555] [2021-11-19 04:49:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:01,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:49:01,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038988555] [2021-11-19 04:49:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038988555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:01,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:01,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:01,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425258937] [2021-11-19 04:49:01,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:01,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:01,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:01,978 INFO L87 Difference]: Start difference. First operand 869 states and 1286 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:03,175 INFO L93 Difference]: Finished difference Result 1811 states and 2674 transitions. [2021-11-19 04:49:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:03,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-19 04:49:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:03,183 INFO L225 Difference]: With dead ends: 1811 [2021-11-19 04:49:03,183 INFO L226 Difference]: Without dead ends: 965 [2021-11-19 04:49:03,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:03,185 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 63 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:03,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 685 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:49:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-19 04:49:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 869. [2021-11-19 04:49:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.478110599078341) internal successors, (1283), 868 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1283 transitions. [2021-11-19 04:49:03,216 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1283 transitions. Word has length 153 [2021-11-19 04:49:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:03,216 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1283 transitions. [2021-11-19 04:49:03,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1283 transitions. [2021-11-19 04:49:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 04:49:03,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:03,220 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:03,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-19 04:49:03,220 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash -747543494, now seen corresponding path program 1 times [2021-11-19 04:49:03,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:03,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819969952] [2021-11-19 04:49:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:03,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:49:03,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:03,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819969952] [2021-11-19 04:49:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819969952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:03,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:03,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:03,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855283823] [2021-11-19 04:49:03,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:03,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:03,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:03,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:03,310 INFO L87 Difference]: Start difference. First operand 869 states and 1283 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:04,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:04,916 INFO L93 Difference]: Finished difference Result 1811 states and 2668 transitions. [2021-11-19 04:49:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 154 [2021-11-19 04:49:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:04,923 INFO L225 Difference]: With dead ends: 1811 [2021-11-19 04:49:04,923 INFO L226 Difference]: Without dead ends: 965 [2021-11-19 04:49:04,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:04,925 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 67 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:04,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 683 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:49:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-19 04:49:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 869. [2021-11-19 04:49:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.4746543778801844) internal successors, (1280), 868 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1280 transitions. [2021-11-19 04:49:04,985 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1280 transitions. Word has length 154 [2021-11-19 04:49:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:04,985 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1280 transitions. [2021-11-19 04:49:04,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1280 transitions. [2021-11-19 04:49:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-19 04:49:04,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:04,989 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:04,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-19 04:49:04,989 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1615340108, now seen corresponding path program 1 times [2021-11-19 04:49:04,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:04,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019416829] [2021-11-19 04:49:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:04,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:49:05,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:05,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019416829] [2021-11-19 04:49:05,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019416829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:05,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:05,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:05,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686066413] [2021-11-19 04:49:05,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:05,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:05,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:05,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:05,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:05,083 INFO L87 Difference]: Start difference. First operand 869 states and 1280 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:05,970 INFO L93 Difference]: Finished difference Result 1811 states and 2662 transitions. [2021-11-19 04:49:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 155 [2021-11-19 04:49:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:05,977 INFO L225 Difference]: With dead ends: 1811 [2021-11-19 04:49:05,977 INFO L226 Difference]: Without dead ends: 965 [2021-11-19 04:49:05,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:05,979 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 65 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:05,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 681 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:49:05,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-19 04:49:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 869. [2021-11-19 04:49:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.4711981566820276) internal successors, (1277), 868 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1277 transitions. [2021-11-19 04:49:06,013 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1277 transitions. Word has length 155 [2021-11-19 04:49:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:06,013 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1277 transitions. [2021-11-19 04:49:06,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1277 transitions. [2021-11-19 04:49:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 04:49:06,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:06,017 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:06,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-19 04:49:06,018 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash 647587093, now seen corresponding path program 1 times [2021-11-19 04:49:06,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:06,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007457764] [2021-11-19 04:49:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:06,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:49:06,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:06,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007457764] [2021-11-19 04:49:06,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007457764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:06,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:06,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:06,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5315783] [2021-11-19 04:49:06,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:06,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:06,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:06,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:06,108 INFO L87 Difference]: Start difference. First operand 869 states and 1277 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:08,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:08,365 INFO L93 Difference]: Finished difference Result 1811 states and 2656 transitions. [2021-11-19 04:49:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:08,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-19 04:49:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:08,370 INFO L225 Difference]: With dead ends: 1811 [2021-11-19 04:49:08,370 INFO L226 Difference]: Without dead ends: 965 [2021-11-19 04:49:08,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:08,372 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 63 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:08,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 679 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 04:49:08,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-11-19 04:49:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 869. [2021-11-19 04:49:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.467741935483871) internal successors, (1274), 868 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1274 transitions. [2021-11-19 04:49:08,402 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1274 transitions. Word has length 156 [2021-11-19 04:49:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:08,403 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1274 transitions. [2021-11-19 04:49:08,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1274 transitions. [2021-11-19 04:49:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 04:49:08,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:08,407 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:08,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-19 04:49:08,408 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash -490685945, now seen corresponding path program 1 times [2021-11-19 04:49:08,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:08,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419196121] [2021-11-19 04:49:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:08,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:49:08,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:08,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419196121] [2021-11-19 04:49:08,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419196121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:08,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:08,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:08,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318798581] [2021-11-19 04:49:08,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:08,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:08,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:08,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:08,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:08,502 INFO L87 Difference]: Start difference. First operand 869 states and 1274 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:10,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:10,429 INFO L93 Difference]: Finished difference Result 1781 states and 2614 transitions. [2021-11-19 04:49:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:10,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-19 04:49:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:10,435 INFO L225 Difference]: With dead ends: 1781 [2021-11-19 04:49:10,435 INFO L226 Difference]: Without dead ends: 935 [2021-11-19 04:49:10,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:10,437 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 54 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:10,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 665 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 04:49:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-19 04:49:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 869. [2021-11-19 04:49:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.4642857142857142) internal successors, (1271), 868 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1271 transitions. [2021-11-19 04:49:10,472 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1271 transitions. Word has length 157 [2021-11-19 04:49:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:10,472 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1271 transitions. [2021-11-19 04:49:10,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1271 transitions. [2021-11-19 04:49:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 04:49:10,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:10,476 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:10,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-19 04:49:10,477 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash -26275507, now seen corresponding path program 1 times [2021-11-19 04:49:10,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:10,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043162316] [2021-11-19 04:49:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:10,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:49:10,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:10,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043162316] [2021-11-19 04:49:10,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043162316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:10,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:10,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:10,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862771781] [2021-11-19 04:49:10,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:10,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:10,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:10,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:10,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:10,574 INFO L87 Difference]: Start difference. First operand 869 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:12,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:12,838 INFO L93 Difference]: Finished difference Result 1781 states and 2608 transitions. [2021-11-19 04:49:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-19 04:49:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:12,847 INFO L225 Difference]: With dead ends: 1781 [2021-11-19 04:49:12,847 INFO L226 Difference]: Without dead ends: 935 [2021-11-19 04:49:12,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:12,852 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 44 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:12,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 663 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 04:49:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-19 04:49:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 869. [2021-11-19 04:49:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.4608294930875576) internal successors, (1268), 868 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1268 transitions. [2021-11-19 04:49:12,887 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1268 transitions. Word has length 161 [2021-11-19 04:49:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:12,888 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1268 transitions. [2021-11-19 04:49:12,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1268 transitions. [2021-11-19 04:49:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 04:49:12,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:12,892 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:12,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-19 04:49:12,892 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash -115063109, now seen corresponding path program 1 times [2021-11-19 04:49:12,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:12,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927337266] [2021-11-19 04:49:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:12,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:49:12,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:12,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927337266] [2021-11-19 04:49:12,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927337266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:12,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:12,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:12,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146664567] [2021-11-19 04:49:12,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:12,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:12,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:12,990 INFO L87 Difference]: Start difference. First operand 869 states and 1268 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:14,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:14,537 INFO L93 Difference]: Finished difference Result 1767 states and 2584 transitions. [2021-11-19 04:49:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:14,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 162 [2021-11-19 04:49:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:14,542 INFO L225 Difference]: With dead ends: 1767 [2021-11-19 04:49:14,542 INFO L226 Difference]: Without dead ends: 921 [2021-11-19 04:49:14,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:14,544 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 36 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:14,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 651 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 04:49:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-19 04:49:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 869. [2021-11-19 04:49:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.457373271889401) internal successors, (1265), 868 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1265 transitions. [2021-11-19 04:49:14,571 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1265 transitions. Word has length 162 [2021-11-19 04:49:14,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:14,571 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1265 transitions. [2021-11-19 04:49:14,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1265 transitions. [2021-11-19 04:49:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 04:49:14,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:14,575 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:14,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-19 04:49:14,575 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:14,576 INFO L85 PathProgramCache]: Analyzing trace with hash 387008699, now seen corresponding path program 1 times [2021-11-19 04:49:14,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:14,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697108806] [2021-11-19 04:49:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:14,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 04:49:14,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:14,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697108806] [2021-11-19 04:49:14,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697108806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:14,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:14,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:14,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451009314] [2021-11-19 04:49:14,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:14,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:14,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:14,713 INFO L87 Difference]: Start difference. First operand 869 states and 1265 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:14,845 INFO L93 Difference]: Finished difference Result 1988 states and 2919 transitions. [2021-11-19 04:49:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-19 04:49:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:14,853 INFO L225 Difference]: With dead ends: 1988 [2021-11-19 04:49:14,854 INFO L226 Difference]: Without dead ends: 1142 [2021-11-19 04:49:14,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:14,856 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 162 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:14,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 387 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-11-19 04:49:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1142. [2021-11-19 04:49:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 1.4583698510078877) internal successors, (1664), 1141 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1664 transitions. [2021-11-19 04:49:14,894 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1664 transitions. Word has length 164 [2021-11-19 04:49:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:14,894 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 1664 transitions. [2021-11-19 04:49:14,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1664 transitions. [2021-11-19 04:49:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 04:49:14,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:14,897 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:14,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-19 04:49:14,898 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1618445046, now seen corresponding path program 1 times [2021-11-19 04:49:14,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:14,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340508116] [2021-11-19 04:49:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:14,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-19 04:49:15,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:15,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340508116] [2021-11-19 04:49:15,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340508116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:15,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:15,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:15,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304183305] [2021-11-19 04:49:15,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:15,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:15,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:15,006 INFO L87 Difference]: Start difference. First operand 1142 states and 1664 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:15,141 INFO L93 Difference]: Finished difference Result 2534 states and 3717 transitions. [2021-11-19 04:49:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 170 [2021-11-19 04:49:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:15,153 INFO L225 Difference]: With dead ends: 2534 [2021-11-19 04:49:15,153 INFO L226 Difference]: Without dead ends: 1415 [2021-11-19 04:49:15,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:15,155 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:15,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 386 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-11-19 04:49:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1415. [2021-11-19 04:49:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 1.4596888260254597) internal successors, (2064), 1414 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2064 transitions. [2021-11-19 04:49:15,230 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2064 transitions. Word has length 170 [2021-11-19 04:49:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:15,231 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 2064 transitions. [2021-11-19 04:49:15,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2064 transitions. [2021-11-19 04:49:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-19 04:49:15,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:15,236 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:15,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-19 04:49:15,236 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1373187691, now seen corresponding path program 1 times [2021-11-19 04:49:15,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:15,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363109158] [2021-11-19 04:49:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:15,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 04:49:15,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:15,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363109158] [2021-11-19 04:49:15,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363109158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:15,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:15,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:15,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904426782] [2021-11-19 04:49:15,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:15,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:15,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:15,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:15,365 INFO L87 Difference]: Start difference. First operand 1415 states and 2064 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:15,511 INFO L93 Difference]: Finished difference Result 3080 states and 4517 transitions. [2021-11-19 04:49:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:15,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-19 04:49:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:15,534 INFO L225 Difference]: With dead ends: 3080 [2021-11-19 04:49:15,534 INFO L226 Difference]: Without dead ends: 1688 [2021-11-19 04:49:15,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:15,537 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:15,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 385 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-11-19 04:49:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1688. [2021-11-19 04:49:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 1.4611736810906935) internal successors, (2465), 1687 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2465 transitions. [2021-11-19 04:49:15,600 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2465 transitions. Word has length 202 [2021-11-19 04:49:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:15,601 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 2465 transitions. [2021-11-19 04:49:15,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2465 transitions. [2021-11-19 04:49:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-19 04:49:15,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:15,606 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:15,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-19 04:49:15,606 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash 724604075, now seen corresponding path program 1 times [2021-11-19 04:49:15,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:15,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876238069] [2021-11-19 04:49:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:15,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 04:49:15,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:15,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876238069] [2021-11-19 04:49:15,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876238069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:15,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:15,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:15,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604975629] [2021-11-19 04:49:15,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:15,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:15,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:15,742 INFO L87 Difference]: Start difference. First operand 1688 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:15,893 INFO L93 Difference]: Finished difference Result 3626 states and 5319 transitions. [2021-11-19 04:49:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:15,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-19 04:49:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:15,903 INFO L225 Difference]: With dead ends: 3626 [2021-11-19 04:49:15,903 INFO L226 Difference]: Without dead ends: 1961 [2021-11-19 04:49:15,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:15,906 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:15,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 384 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-11-19 04:49:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1961. [2021-11-19 04:49:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.4627551020408163) internal successors, (2867), 1960 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2867 transitions. [2021-11-19 04:49:15,981 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2867 transitions. Word has length 204 [2021-11-19 04:49:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:15,982 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 2867 transitions. [2021-11-19 04:49:15,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2867 transitions. [2021-11-19 04:49:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-19 04:49:15,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:15,988 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:15,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-19 04:49:15,988 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash 955471719, now seen corresponding path program 1 times [2021-11-19 04:49:15,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:15,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203929852] [2021-11-19 04:49:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:15,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 04:49:16,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:16,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203929852] [2021-11-19 04:49:16,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203929852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:16,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:16,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:16,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455354673] [2021-11-19 04:49:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:16,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:16,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:16,112 INFO L87 Difference]: Start difference. First operand 1961 states and 2867 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:16,297 INFO L93 Difference]: Finished difference Result 4172 states and 6123 transitions. [2021-11-19 04:49:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:16,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-19 04:49:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:16,313 INFO L225 Difference]: With dead ends: 4172 [2021-11-19 04:49:16,314 INFO L226 Difference]: Without dead ends: 2234 [2021-11-19 04:49:16,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:16,317 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:16,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 383 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-11-19 04:49:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2234. [2021-11-19 04:49:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 1.464397671294223) internal successors, (3270), 2233 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3270 transitions. [2021-11-19 04:49:16,410 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3270 transitions. Word has length 237 [2021-11-19 04:49:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:16,411 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 3270 transitions. [2021-11-19 04:49:16,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3270 transitions. [2021-11-19 04:49:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-19 04:49:16,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:16,418 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:16,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-19 04:49:16,419 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1840467843, now seen corresponding path program 1 times [2021-11-19 04:49:16,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:16,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391376544] [2021-11-19 04:49:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:16,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-19 04:49:16,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:16,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391376544] [2021-11-19 04:49:16,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391376544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:16,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:16,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:16,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042842391] [2021-11-19 04:49:16,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:16,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:16,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:16,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:16,555 INFO L87 Difference]: Start difference. First operand 2234 states and 3270 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:16,730 INFO L93 Difference]: Finished difference Result 4710 states and 6916 transitions. [2021-11-19 04:49:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:16,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 272 [2021-11-19 04:49:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:16,738 INFO L225 Difference]: With dead ends: 4710 [2021-11-19 04:49:16,738 INFO L226 Difference]: Without dead ends: 2499 [2021-11-19 04:49:16,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:16,747 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 152 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:16,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 593 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-11-19 04:49:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2499. [2021-11-19 04:49:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 1.4631705364291434) internal successors, (3655), 2498 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3655 transitions. [2021-11-19 04:49:16,838 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3655 transitions. Word has length 272 [2021-11-19 04:49:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:16,839 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 3655 transitions. [2021-11-19 04:49:16,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3655 transitions. [2021-11-19 04:49:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-19 04:49:16,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:16,846 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:16,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-19 04:49:16,846 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1055432743, now seen corresponding path program 1 times [2021-11-19 04:49:16,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:16,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257121322] [2021-11-19 04:49:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:16,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-11-19 04:49:17,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:17,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257121322] [2021-11-19 04:49:17,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257121322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:17,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:17,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:17,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591412827] [2021-11-19 04:49:17,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:17,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:17,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:17,051 INFO L87 Difference]: Start difference. First operand 2499 states and 3655 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:17,234 INFO L93 Difference]: Finished difference Result 5248 states and 7699 transitions. [2021-11-19 04:49:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:17,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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 311 [2021-11-19 04:49:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:17,243 INFO L225 Difference]: With dead ends: 5248 [2021-11-19 04:49:17,243 INFO L226 Difference]: Without dead ends: 2772 [2021-11-19 04:49:17,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:17,254 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 164 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:17,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 381 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2021-11-19 04:49:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2772. [2021-11-19 04:49:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2771 states have (on average 1.465175027066041) internal successors, (4060), 2771 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4060 transitions. [2021-11-19 04:49:17,356 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4060 transitions. Word has length 311 [2021-11-19 04:49:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:17,357 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 4060 transitions. [2021-11-19 04:49:17,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4060 transitions. [2021-11-19 04:49:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-19 04:49:17,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:17,380 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:17,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-19 04:49:17,380 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2047157944, now seen corresponding path program 1 times [2021-11-19 04:49:17,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:17,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661398734] [2021-11-19 04:49:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:17,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2021-11-19 04:49:17,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:17,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661398734] [2021-11-19 04:49:17,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661398734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:17,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:17,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:17,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291166784] [2021-11-19 04:49:17,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:17,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:17,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:17,555 INFO L87 Difference]: Start difference. First operand 2772 states and 4060 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:17,739 INFO L93 Difference]: Finished difference Result 5794 states and 8509 transitions. [2021-11-19 04:49:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:17,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 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 352 [2021-11-19 04:49:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:17,748 INFO L225 Difference]: With dead ends: 5794 [2021-11-19 04:49:17,748 INFO L226 Difference]: Without dead ends: 3045 [2021-11-19 04:49:17,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:17,752 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:17,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 380 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-11-19 04:49:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 3045. [2021-11-19 04:49:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3045 states, 3044 states have (on average 1.4671484888304862) internal successors, (4466), 3044 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3045 states to 3045 states and 4466 transitions. [2021-11-19 04:49:17,923 INFO L78 Accepts]: Start accepts. Automaton has 3045 states and 4466 transitions. Word has length 352 [2021-11-19 04:49:17,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:17,924 INFO L470 AbstractCegarLoop]: Abstraction has 3045 states and 4466 transitions. [2021-11-19 04:49:17,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3045 states and 4466 transitions. [2021-11-19 04:49:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-11-19 04:49:17,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:17,933 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:17,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-19 04:49:17,933 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash 755578325, now seen corresponding path program 1 times [2021-11-19 04:49:17,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:17,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263923000] [2021-11-19 04:49:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:17,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2021-11-19 04:49:18,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:18,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263923000] [2021-11-19 04:49:18,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263923000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:18,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:18,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:18,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526303945] [2021-11-19 04:49:18,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:18,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:18,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:18,143 INFO L87 Difference]: Start difference. First operand 3045 states and 4466 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:18,349 INFO L93 Difference]: Finished difference Result 6333 states and 9310 transitions. [2021-11-19 04:49:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:18,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 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 395 [2021-11-19 04:49:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:18,359 INFO L225 Difference]: With dead ends: 6333 [2021-11-19 04:49:18,359 INFO L226 Difference]: Without dead ends: 3311 [2021-11-19 04:49:18,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:18,364 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:18,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-11-19 04:49:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 3311. [2021-11-19 04:49:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3311 states, 3310 states have (on average 1.4658610271903323) internal successors, (4852), 3310 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3311 states to 3311 states and 4852 transitions. [2021-11-19 04:49:18,484 INFO L78 Accepts]: Start accepts. Automaton has 3311 states and 4852 transitions. Word has length 395 [2021-11-19 04:49:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:18,485 INFO L470 AbstractCegarLoop]: Abstraction has 3311 states and 4852 transitions. [2021-11-19 04:49:18,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3311 states and 4852 transitions. [2021-11-19 04:49:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-11-19 04:49:18,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:18,496 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:18,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-19 04:49:18,497 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash -283249045, now seen corresponding path program 1 times [2021-11-19 04:49:18,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:18,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757644426] [2021-11-19 04:49:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:18,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-19 04:49:18,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:18,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757644426] [2021-11-19 04:49:18,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757644426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:18,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:18,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:18,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346262786] [2021-11-19 04:49:18,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:18,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:18,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:18,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:18,758 INFO L87 Difference]: Start difference. First operand 3311 states and 4852 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:18,956 INFO L93 Difference]: Finished difference Result 6872 states and 10093 transitions. [2021-11-19 04:49:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 435 [2021-11-19 04:49:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:18,967 INFO L225 Difference]: With dead ends: 6872 [2021-11-19 04:49:18,967 INFO L226 Difference]: Without dead ends: 3584 [2021-11-19 04:49:18,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:18,973 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 164 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:18,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 378 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-11-19 04:49:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3584. [2021-11-19 04:49:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 1.4680435389338544) internal successors, (5260), 3583 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 5260 transitions. [2021-11-19 04:49:19,142 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 5260 transitions. Word has length 435 [2021-11-19 04:49:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:19,143 INFO L470 AbstractCegarLoop]: Abstraction has 3584 states and 5260 transitions. [2021-11-19 04:49:19,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 5260 transitions. [2021-11-19 04:49:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-19 04:49:19,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:19,155 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:19,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-19 04:49:19,156 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:19,157 INFO L85 PathProgramCache]: Analyzing trace with hash 210108815, now seen corresponding path program 1 times [2021-11-19 04:49:19,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:19,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716471209] [2021-11-19 04:49:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:19,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2130 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 1772 trivial. 0 not checked. [2021-11-19 04:49:19,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:19,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716471209] [2021-11-19 04:49:19,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716471209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:19,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:19,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:19,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890396456] [2021-11-19 04:49:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:19,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:19,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:19,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:19,401 INFO L87 Difference]: Start difference. First operand 3584 states and 5260 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:19,634 INFO L93 Difference]: Finished difference Result 7418 states and 10909 transitions. [2021-11-19 04:49:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 477 [2021-11-19 04:49:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:19,644 INFO L225 Difference]: With dead ends: 7418 [2021-11-19 04:49:19,645 INFO L226 Difference]: Without dead ends: 3857 [2021-11-19 04:49:19,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:19,649 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:19,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 377 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2021-11-19 04:49:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3857. [2021-11-19 04:49:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 1.470176348547718) internal successors, (5669), 3856 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 5669 transitions. [2021-11-19 04:49:19,816 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 5669 transitions. Word has length 477 [2021-11-19 04:49:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:19,817 INFO L470 AbstractCegarLoop]: Abstraction has 3857 states and 5669 transitions. [2021-11-19 04:49:19,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 5669 transitions. [2021-11-19 04:49:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-11-19 04:49:19,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:19,831 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:19,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-19 04:49:19,832 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:19,833 INFO L85 PathProgramCache]: Analyzing trace with hash -946234462, now seen corresponding path program 1 times [2021-11-19 04:49:19,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:19,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086441012] [2021-11-19 04:49:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:19,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2021-11-19 04:49:20,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:20,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086441012] [2021-11-19 04:49:20,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086441012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:20,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:20,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:20,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367978657] [2021-11-19 04:49:20,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:20,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:20,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:20,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:20,159 INFO L87 Difference]: Start difference. First operand 3857 states and 5669 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:22,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:22,726 INFO L93 Difference]: Finished difference Result 9236 states and 13632 transitions. [2021-11-19 04:49:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:49:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 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 521 [2021-11-19 04:49:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:22,741 INFO L225 Difference]: With dead ends: 9236 [2021-11-19 04:49:22,742 INFO L226 Difference]: Without dead ends: 5402 [2021-11-19 04:49:22,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:49:22,748 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 110 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:22,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 791 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 282 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:49:22,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-11-19 04:49:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4431. [2021-11-19 04:49:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 1.5167042889390518) internal successors, (6719), 4430 states have internal predecessors, (6719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 6719 transitions. [2021-11-19 04:49:22,920 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 6719 transitions. Word has length 521 [2021-11-19 04:49:22,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:22,921 INFO L470 AbstractCegarLoop]: Abstraction has 4431 states and 6719 transitions. [2021-11-19 04:49:22,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 6719 transitions. [2021-11-19 04:49:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-11-19 04:49:22,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:22,934 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:22,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-19 04:49:22,934 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1738044250, now seen corresponding path program 1 times [2021-11-19 04:49:22,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:22,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576633070] [2021-11-19 04:49:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:22,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 2135 trivial. 0 not checked. [2021-11-19 04:49:23,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:23,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576633070] [2021-11-19 04:49:23,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576633070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:23,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:23,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:23,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052822798] [2021-11-19 04:49:23,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:23,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:23,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:23,229 INFO L87 Difference]: Start difference. First operand 4431 states and 6719 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:23,388 INFO L93 Difference]: Finished difference Result 9147 states and 13893 transitions. [2021-11-19 04:49:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 521 [2021-11-19 04:49:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:23,400 INFO L225 Difference]: With dead ends: 9147 [2021-11-19 04:49:23,400 INFO L226 Difference]: Without dead ends: 4739 [2021-11-19 04:49:23,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:23,406 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:23,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2021-11-19 04:49:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4739. [2021-11-19 04:49:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4739 states, 4738 states have (on average 1.515618404390038) internal successors, (7181), 4738 states have internal predecessors, (7181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 7181 transitions. [2021-11-19 04:49:23,655 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 7181 transitions. Word has length 521 [2021-11-19 04:49:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:23,656 INFO L470 AbstractCegarLoop]: Abstraction has 4739 states and 7181 transitions. [2021-11-19 04:49:23,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 7181 transitions. [2021-11-19 04:49:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-11-19 04:49:23,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:23,670 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:23,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-19 04:49:23,670 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash -766750423, now seen corresponding path program 1 times [2021-11-19 04:49:23,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:23,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964619065] [2021-11-19 04:49:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:23,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 2528 trivial. 0 not checked. [2021-11-19 04:49:23,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:23,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964619065] [2021-11-19 04:49:23,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964619065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:23,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:23,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:23,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287932957] [2021-11-19 04:49:23,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:23,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:23,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:23,954 INFO L87 Difference]: Start difference. First operand 4739 states and 7181 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:24,157 INFO L93 Difference]: Finished difference Result 9769 states and 14826 transitions. [2021-11-19 04:49:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 562 [2021-11-19 04:49:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:24,169 INFO L225 Difference]: With dead ends: 9769 [2021-11-19 04:49:24,169 INFO L226 Difference]: Without dead ends: 5053 [2021-11-19 04:49:24,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:24,176 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 164 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:24,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 375 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2021-11-19 04:49:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 5053. [2021-11-19 04:49:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 1.5176167854315123) internal successors, (7667), 5052 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 7667 transitions. [2021-11-19 04:49:24,425 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 7667 transitions. Word has length 562 [2021-11-19 04:49:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:24,426 INFO L470 AbstractCegarLoop]: Abstraction has 5053 states and 7667 transitions. [2021-11-19 04:49:24,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 7667 transitions. [2021-11-19 04:49:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2021-11-19 04:49:24,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:24,447 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:24,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-19 04:49:24,448 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1710657809, now seen corresponding path program 1 times [2021-11-19 04:49:24,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:24,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021231517] [2021-11-19 04:49:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:24,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2021-11-19 04:49:24,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:24,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021231517] [2021-11-19 04:49:24,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021231517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:24,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:24,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:24,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623671162] [2021-11-19 04:49:24,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:24,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:24,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:24,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:24,746 INFO L87 Difference]: Start difference. First operand 5053 states and 7667 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:25,005 INFO L93 Difference]: Finished difference Result 10397 states and 15798 transitions. [2021-11-19 04:49:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 605 [2021-11-19 04:49:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:25,017 INFO L225 Difference]: With dead ends: 10397 [2021-11-19 04:49:25,017 INFO L226 Difference]: Without dead ends: 5367 [2021-11-19 04:49:25,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:25,025 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:25,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 374 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2021-11-19 04:49:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 5367. [2021-11-19 04:49:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5366 states have (on average 1.5195676481550504) internal successors, (8154), 5366 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 8154 transitions. [2021-11-19 04:49:25,241 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 8154 transitions. Word has length 605 [2021-11-19 04:49:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:25,242 INFO L470 AbstractCegarLoop]: Abstraction has 5367 states and 8154 transitions. [2021-11-19 04:49:25,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 8154 transitions. [2021-11-19 04:49:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2021-11-19 04:49:25,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:25,257 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:25,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-19 04:49:25,258 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:25,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1855149635, now seen corresponding path program 1 times [2021-11-19 04:49:25,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:25,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110375005] [2021-11-19 04:49:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:25,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 502 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2021-11-19 04:49:25,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:25,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110375005] [2021-11-19 04:49:25,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110375005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:25,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:25,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:25,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249798503] [2021-11-19 04:49:25,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:25,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:25,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:25,616 INFO L87 Difference]: Start difference. First operand 5367 states and 8154 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:25,825 INFO L93 Difference]: Finished difference Result 11020 states and 16765 transitions. [2021-11-19 04:49:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:25,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 650 [2021-11-19 04:49:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:25,835 INFO L225 Difference]: With dead ends: 11020 [2021-11-19 04:49:25,835 INFO L226 Difference]: Without dead ends: 5676 [2021-11-19 04:49:25,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:25,844 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:25,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-11-19 04:49:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 5676. [2021-11-19 04:49:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5676 states, 5675 states have (on average 1.5184140969162996) internal successors, (8617), 5675 states have internal predecessors, (8617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 8617 transitions. [2021-11-19 04:49:26,036 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 8617 transitions. Word has length 650 [2021-11-19 04:49:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:26,037 INFO L470 AbstractCegarLoop]: Abstraction has 5676 states and 8617 transitions. [2021-11-19 04:49:26,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:26,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 8617 transitions. [2021-11-19 04:49:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2021-11-19 04:49:26,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:26,047 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 17, 17, 16, 16, 15, 15, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:26,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-19 04:49:26,048 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1011628098, now seen corresponding path program 1 times [2021-11-19 04:49:26,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:26,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539700961] [2021-11-19 04:49:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:26,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4490 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 3946 trivial. 0 not checked. [2021-11-19 04:49:26,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:26,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539700961] [2021-11-19 04:49:26,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539700961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:26,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:26,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:26,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856862598] [2021-11-19 04:49:26,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:26,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:26,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:26,361 INFO L87 Difference]: Start difference. First operand 5676 states and 8617 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:26,576 INFO L93 Difference]: Finished difference Result 11643 states and 17698 transitions. [2021-11-19 04:49:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 692 [2021-11-19 04:49:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:26,582 INFO L225 Difference]: With dead ends: 11643 [2021-11-19 04:49:26,582 INFO L226 Difference]: Without dead ends: 5990 [2021-11-19 04:49:26,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:26,586 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 164 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:26,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 372 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:26,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-11-19 04:49:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5990. [2021-11-19 04:49:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 1.5204541659709467) internal successors, (9106), 5989 states have internal predecessors, (9106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 9106 transitions. [2021-11-19 04:49:26,712 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 9106 transitions. Word has length 692 [2021-11-19 04:49:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:26,713 INFO L470 AbstractCegarLoop]: Abstraction has 5990 states and 9106 transitions. [2021-11-19 04:49:26,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 9106 transitions. [2021-11-19 04:49:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2021-11-19 04:49:26,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:26,722 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:26,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-19 04:49:26,722 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash -673495105, now seen corresponding path program 1 times [2021-11-19 04:49:26,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:26,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022727977] [2021-11-19 04:49:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:26,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 575 proven. 0 refuted. 0 times theorem prover too weak. 4500 trivial. 0 not checked. [2021-11-19 04:49:27,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:27,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022727977] [2021-11-19 04:49:27,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022727977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:27,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:27,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:49:27,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211004000] [2021-11-19 04:49:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:27,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:49:27,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:27,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:49:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:27,048 INFO L87 Difference]: Start difference. First operand 5990 states and 9106 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:27,236 INFO L93 Difference]: Finished difference Result 6306 states and 9598 transitions. [2021-11-19 04:49:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:49:27,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 736 [2021-11-19 04:49:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:27,243 INFO L225 Difference]: With dead ends: 6306 [2021-11-19 04:49:27,243 INFO L226 Difference]: Without dead ends: 6304 [2021-11-19 04:49:27,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:49:27,245 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:27,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-11-19 04:49:27,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 6304. [2021-11-19 04:49:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 6303 states have (on average 1.522449627161669) internal successors, (9596), 6303 states have internal predecessors, (9596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 9596 transitions. [2021-11-19 04:49:27,428 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 9596 transitions. Word has length 736 [2021-11-19 04:49:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:27,428 INFO L470 AbstractCegarLoop]: Abstraction has 6304 states and 9596 transitions. [2021-11-19 04:49:27,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 9596 transitions. [2021-11-19 04:49:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-19 04:49:27,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:27,438 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:27,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-19 04:49:27,438 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:27,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:27,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1745672823, now seen corresponding path program 1 times [2021-11-19 04:49:27,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:27,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029957996] [2021-11-19 04:49:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:27,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3358 proven. 81 refuted. 0 times theorem prover too weak. 2263 trivial. 0 not checked. [2021-11-19 04:49:28,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:28,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029957996] [2021-11-19 04:49:28,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029957996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:28,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453163393] [2021-11-19 04:49:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:28,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:28,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:28,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:28,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:49:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:28,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:49:28,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:28,777 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 04:49:28,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:49:28,948 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 04:49:28,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-19 04:49:29,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-19 04:49:29,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:49:29,641 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 41 treesize of output 29 [2021-11-19 04:49:29,647 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 23 [2021-11-19 04:49:29,673 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-19 04:49:29,674 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 [2021-11-19 04:49:30,543 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-19 04:49:30,544 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 [2021-11-19 04:49:33,024 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-11-19 04:49:33,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 61 [2021-11-19 04:49:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3211 proven. 194 refuted. 0 times theorem prover too weak. 2297 trivial. 0 not checked. [2021-11-19 04:49:33,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:34,760 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 43 treesize of output 31 [2021-11-19 04:49:34,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-11-19 04:49:36,101 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_13 Int) (v_arrayElimCell_12 Int)) (not (= (select (store (select (store |c_#memory_int| v_arrayElimCell_12 (store (select |c_#memory_int| v_arrayElimCell_12) (+ 844 v_arrayElimCell_13) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)) 8640))) is different from false [2021-11-19 04:49:36,113 INFO L354 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2021-11-19 04:49:36,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 1 [2021-11-19 04:49:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3213 proven. 0 refuted. 0 times theorem prover too weak. 2489 trivial. 0 not checked. [2021-11-19 04:49:36,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453163393] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:36,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:49:36,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 11] total 17 [2021-11-19 04:49:36,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146702854] [2021-11-19 04:49:36,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:36,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:49:36,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:49:36,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2021-11-19 04:49:36,562 INFO L87 Difference]: Start difference. First operand 6304 states and 9596 transitions. Second operand has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:38,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:40,264 WARN L838 $PredicateComparison]: unable to prove that (and (not (= 8640 (select (store (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)))) (forall ((v_arrayElimCell_13 Int) (v_arrayElimCell_12 Int)) (not (= (select (store (select (store |c_#memory_int| v_arrayElimCell_12 (store (select |c_#memory_int| v_arrayElimCell_12) (+ 844 v_arrayElimCell_13) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)) 8640)))) is different from false [2021-11-19 04:49:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:40,635 INFO L93 Difference]: Finished difference Result 15088 states and 22964 transitions. [2021-11-19 04:49:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:49:40,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 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 782 [2021-11-19 04:49:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:40,688 INFO L225 Difference]: With dead ends: 15088 [2021-11-19 04:49:40,691 INFO L226 Difference]: Without dead ends: 8807 [2021-11-19 04:49:40,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1573 GetRequests, 1554 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=50, Invalid=228, Unknown=2, NotChecked=62, Total=342 [2021-11-19 04:49:40,696 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 142 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:40,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 544 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 255 Invalid, 1 Unknown, 307 Unchecked, 2.4s Time] [2021-11-19 04:49:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8807 states. [2021-11-19 04:49:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8807 to 7104. [2021-11-19 04:49:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 1.5508939884555821) internal successors, (11016), 7103 states have internal predecessors, (11016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 11016 transitions. [2021-11-19 04:49:40,922 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 11016 transitions. Word has length 782 [2021-11-19 04:49:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:40,923 INFO L470 AbstractCegarLoop]: Abstraction has 7104 states and 11016 transitions. [2021-11-19 04:49:40,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 11016 transitions. [2021-11-19 04:49:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-19 04:49:40,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:40,938 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:40,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:41,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:41,151 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash -903556745, now seen corresponding path program 1 times [2021-11-19 04:49:41,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:41,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483491301] [2021-11-19 04:49:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:41,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3371 proven. 81 refuted. 0 times theorem prover too weak. 2250 trivial. 0 not checked. [2021-11-19 04:49:41,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:41,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483491301] [2021-11-19 04:49:41,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483491301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:41,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084758126] [2021-11-19 04:49:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:41,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:41,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:41,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:41,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:49:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:42,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 2511 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:49:42,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:42,786 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 42 treesize of output 30 [2021-11-19 04:49:42,790 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 30 treesize of output 24 [2021-11-19 04:49:42,812 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-19 04:49:42,813 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 24 treesize of output 33 [2021-11-19 04:49:42,919 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-19 04:49:42,919 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 33 treesize of output 45 [2021-11-19 04:49:43,206 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 04:49:43,207 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 29 treesize of output 11 [2021-11-19 04:49:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3226 proven. 0 refuted. 0 times theorem prover too weak. 2476 trivial. 0 not checked. [2021-11-19 04:49:43,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:49:43,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084758126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:43,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:49:43,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2021-11-19 04:49:43,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225933042] [2021-11-19 04:49:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:43,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:49:43,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:49:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:49:43,926 INFO L87 Difference]: Start difference. First operand 7104 states and 11016 transitions. Second operand has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:45,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:47,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:49,025 INFO L93 Difference]: Finished difference Result 20231 states and 31527 transitions. [2021-11-19 04:49:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:49:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 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 782 [2021-11-19 04:49:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:49,038 INFO L225 Difference]: With dead ends: 20231 [2021-11-19 04:49:49,038 INFO L226 Difference]: Without dead ends: 13150 [2021-11-19 04:49:49,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 781 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:49:49,043 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 110 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 27 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:49,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1239 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 464 Invalid, 2 Unknown, 183 Unchecked, 4.8s Time] [2021-11-19 04:49:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13150 states. [2021-11-19 04:49:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13150 to 12528. [2021-11-19 04:49:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12528 states, 12527 states have (on average 1.5694899018120858) internal successors, (19661), 12527 states have internal predecessors, (19661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12528 states to 12528 states and 19661 transitions. [2021-11-19 04:49:49,360 INFO L78 Accepts]: Start accepts. Automaton has 12528 states and 19661 transitions. Word has length 782 [2021-11-19 04:49:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:49,361 INFO L470 AbstractCegarLoop]: Abstraction has 12528 states and 19661 transitions. [2021-11-19 04:49:49,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 12528 states and 19661 transitions. [2021-11-19 04:49:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-11-19 04:49:49,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:49,384 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 11, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:49,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:49,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:49,599 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1048608746, now seen corresponding path program 1 times [2021-11-19 04:49:49,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:49,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414328672] [2021-11-19 04:49:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:49,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 3227 proven. 0 refuted. 0 times theorem prover too weak. 2502 trivial. 0 not checked. [2021-11-19 04:49:50,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:50,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414328672] [2021-11-19 04:49:50,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414328672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:50,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:50,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:49:50,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369602258] [2021-11-19 04:49:50,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:50,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:49:50,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:49:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:49:50,217 INFO L87 Difference]: Start difference. First operand 12528 states and 19661 transitions. Second operand has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:51,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:53,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:55,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:57,985 INFO L93 Difference]: Finished difference Result 36339 states and 56554 transitions. [2021-11-19 04:49:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:49:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 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 785 [2021-11-19 04:49:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:58,013 INFO L225 Difference]: With dead ends: 36339 [2021-11-19 04:49:58,013 INFO L226 Difference]: Without dead ends: 23834 [2021-11-19 04:49:58,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:49:58,024 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 803 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 89 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:58,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 1420 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 849 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2021-11-19 04:49:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23834 states. [2021-11-19 04:49:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23834 to 13488. [2021-11-19 04:49:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13488 states, 13487 states have (on average 1.5793727292948765) internal successors, (21301), 13487 states have internal predecessors, (21301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13488 states to 13488 states and 21301 transitions. [2021-11-19 04:49:58,627 INFO L78 Accepts]: Start accepts. Automaton has 13488 states and 21301 transitions. Word has length 785 [2021-11-19 04:49:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:58,628 INFO L470 AbstractCegarLoop]: Abstraction has 13488 states and 21301 transitions. [2021-11-19 04:49:58,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.857142857142858) internal successors, (223), 7 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13488 states and 21301 transitions. [2021-11-19 04:49:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-11-19 04:49:58,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:58,658 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:58,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-19 04:49:58,658 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:58,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1153034768, now seen corresponding path program 1 times [2021-11-19 04:49:58,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:58,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935501965] [2021-11-19 04:49:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:58,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5717 backedges. 3231 proven. 0 refuted. 0 times theorem prover too weak. 2486 trivial. 0 not checked. [2021-11-19 04:49:59,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:59,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935501965] [2021-11-19 04:49:59,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935501965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:49:59,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:49:59,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:49:59,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202176699] [2021-11-19 04:49:59,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:49:59,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:49:59,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:49:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:49:59,039 INFO L87 Difference]: Start difference. First operand 13488 states and 21301 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:01,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:02,015 INFO L93 Difference]: Finished difference Result 28993 states and 45231 transitions. [2021-11-19 04:50:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 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 785 [2021-11-19 04:50:02,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:02,037 INFO L225 Difference]: With dead ends: 28993 [2021-11-19 04:50:02,037 INFO L226 Difference]: Without dead ends: 15528 [2021-11-19 04:50:02,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:02,049 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 93 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:02,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 761 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 04:50:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15528 states. [2021-11-19 04:50:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15528 to 13528. [2021-11-19 04:50:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 13527 states have (on average 1.5776594958231684) internal successors, (21341), 13527 states have internal predecessors, (21341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 21341 transitions. [2021-11-19 04:50:02,482 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 21341 transitions. Word has length 785 [2021-11-19 04:50:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:02,482 INFO L470 AbstractCegarLoop]: Abstraction has 13528 states and 21341 transitions. [2021-11-19 04:50:02,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 21341 transitions. [2021-11-19 04:50:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-11-19 04:50:02,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:02,500 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 21, 21, 21, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:02,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-19 04:50:02,500 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:02,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:02,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1493392829, now seen corresponding path program 1 times [2021-11-19 04:50:02,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:02,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73166638] [2021-11-19 04:50:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:02,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6425 backedges. 3637 proven. 28 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2021-11-19 04:50:02,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:02,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73166638] [2021-11-19 04:50:02,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73166638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:02,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852072349] [2021-11-19 04:50:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:02,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:02,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:02,868 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:02,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:50:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:03,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 04:50:03,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:03,400 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 04:50:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:50:03,521 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 04:50:03,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-19 04:50:03,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-19 04:50:04,091 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 74 treesize of output 50 [2021-11-19 04:50:04,094 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 50 treesize of output 38 [2021-11-19 04:50:04,146 INFO L354 Elim1Store]: treesize reduction 85, result has 30.9 percent of original size [2021-11-19 04:50:04,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 47 [2021-11-19 04:50:04,421 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 04:50:04,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-19 04:50:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6425 backedges. 3631 proven. 226 refuted. 0 times theorem prover too weak. 2568 trivial. 0 not checked. [2021-11-19 04:50:05,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:05,896 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 48 treesize of output 36 [2021-11-19 04:50:05,908 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 36 treesize of output 30 [2021-11-19 04:50:05,913 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 04:50:05,913 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-11-19 04:50:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6425 backedges. 3627 proven. 0 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2021-11-19 04:50:06,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852072349] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:06,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:50:06,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 11 [2021-11-19 04:50:06,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003742055] [2021-11-19 04:50:06,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:06,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:06,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:06,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:50:06,439 INFO L87 Difference]: Start difference. First operand 13528 states and 21341 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:08,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:09,295 INFO L93 Difference]: Finished difference Result 31498 states and 49729 transitions. [2021-11-19 04:50:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:09,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 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 821 [2021-11-19 04:50:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:09,314 INFO L225 Difference]: With dead ends: 31498 [2021-11-19 04:50:09,314 INFO L226 Difference]: Without dead ends: 17993 [2021-11-19 04:50:09,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1649 GetRequests, 1639 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:50:09,329 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 140 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:09,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 616 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:50:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17993 states. [2021-11-19 04:50:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17993 to 15368. [2021-11-19 04:50:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15368 states, 15367 states have (on average 1.6204203813366305) internal successors, (24901), 15367 states have internal predecessors, (24901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15368 states to 15368 states and 24901 transitions. [2021-11-19 04:50:09,695 INFO L78 Accepts]: Start accepts. Automaton has 15368 states and 24901 transitions. Word has length 821 [2021-11-19 04:50:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:09,695 INFO L470 AbstractCegarLoop]: Abstraction has 15368 states and 24901 transitions. [2021-11-19 04:50:09,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 15368 states and 24901 transitions. [2021-11-19 04:50:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2021-11-19 04:50:09,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:09,714 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 21, 21, 21, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:09,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-19 04:50:09,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:09,915 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:09,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1058526408, now seen corresponding path program 1 times [2021-11-19 04:50:09,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:09,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174304326] [2021-11-19 04:50:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:09,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 3564 proven. 0 refuted. 0 times theorem prover too weak. 2876 trivial. 0 not checked. [2021-11-19 04:50:10,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:10,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174304326] [2021-11-19 04:50:10,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174304326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:10,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:10,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:10,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826429045] [2021-11-19 04:50:10,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:10,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:10,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:10,222 INFO L87 Difference]: Start difference. First operand 15368 states and 24901 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:11,816 INFO L93 Difference]: Finished difference Result 32393 states and 52219 transitions. [2021-11-19 04:50:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:11,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 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 824 [2021-11-19 04:50:11,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:11,837 INFO L225 Difference]: With dead ends: 32393 [2021-11-19 04:50:11,837 INFO L226 Difference]: Without dead ends: 17048 [2021-11-19 04:50:11,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:11,847 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 61 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:11,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 697 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:50:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17048 states. [2021-11-19 04:50:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17048 to 15848. [2021-11-19 04:50:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15848 states, 15847 states have (on average 1.624345301949896) internal successors, (25741), 15847 states have internal predecessors, (25741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15848 states to 15848 states and 25741 transitions. [2021-11-19 04:50:12,250 INFO L78 Accepts]: Start accepts. Automaton has 15848 states and 25741 transitions. Word has length 824 [2021-11-19 04:50:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:12,251 INFO L470 AbstractCegarLoop]: Abstraction has 15848 states and 25741 transitions. [2021-11-19 04:50:12,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 15848 states and 25741 transitions. [2021-11-19 04:50:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2021-11-19 04:50:12,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:12,270 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 11, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:12,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-19 04:50:12,270 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash -333712258, now seen corresponding path program 1 times [2021-11-19 04:50:12,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:12,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85516300] [2021-11-19 04:50:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:12,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6206 backedges. 3489 proven. 0 refuted. 0 times theorem prover too weak. 2717 trivial. 0 not checked. [2021-11-19 04:50:12,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:12,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85516300] [2021-11-19 04:50:12,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85516300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:12,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:12,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:50:12,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942439918] [2021-11-19 04:50:12,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:12,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:50:12,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:50:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:12,821 INFO L87 Difference]: Start difference. First operand 15848 states and 25741 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:14,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:14,865 INFO L93 Difference]: Finished difference Result 34338 states and 55009 transitions. [2021-11-19 04:50:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 830 [2021-11-19 04:50:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:14,885 INFO L225 Difference]: With dead ends: 34338 [2021-11-19 04:50:14,885 INFO L226 Difference]: Without dead ends: 18513 [2021-11-19 04:50:14,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:50:14,896 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 315 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:14,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 425 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:50:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18513 states. [2021-11-19 04:50:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18513 to 15048. [2021-11-19 04:50:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15048 states, 15047 states have (on average 1.6123479763407988) internal successors, (24261), 15047 states have internal predecessors, (24261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15048 states to 15048 states and 24261 transitions. [2021-11-19 04:50:15,418 INFO L78 Accepts]: Start accepts. Automaton has 15048 states and 24261 transitions. Word has length 830 [2021-11-19 04:50:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:15,418 INFO L470 AbstractCegarLoop]: Abstraction has 15048 states and 24261 transitions. [2021-11-19 04:50:15,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 15048 states and 24261 transitions. [2021-11-19 04:50:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2021-11-19 04:50:15,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:15,443 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:15,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-19 04:50:15,443 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:15,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1511771028, now seen corresponding path program 1 times [2021-11-19 04:50:15,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:15,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123820635] [2021-11-19 04:50:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:15,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6194 backedges. 3264 proven. 0 refuted. 0 times theorem prover too weak. 2930 trivial. 0 not checked. [2021-11-19 04:50:15,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:15,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123820635] [2021-11-19 04:50:15,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123820635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:15,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:15,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:15,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293486949] [2021-11-19 04:50:15,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:15,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:15,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:15,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:15,840 INFO L87 Difference]: Start difference. First operand 15048 states and 24261 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:17,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:18,790 INFO L93 Difference]: Finished difference Result 32073 states and 51071 transitions. [2021-11-19 04:50:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 0 states have call successors, (0), 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 830 [2021-11-19 04:50:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:18,809 INFO L225 Difference]: With dead ends: 32073 [2021-11-19 04:50:18,809 INFO L226 Difference]: Without dead ends: 17048 [2021-11-19 04:50:18,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:18,818 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 122 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:18,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 759 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 04:50:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17048 states. [2021-11-19 04:50:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17048 to 15048. [2021-11-19 04:50:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15048 states, 15047 states have (on average 1.6096896391307238) internal successors, (24221), 15047 states have internal predecessors, (24221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15048 states to 15048 states and 24221 transitions. [2021-11-19 04:50:19,309 INFO L78 Accepts]: Start accepts. Automaton has 15048 states and 24221 transitions. Word has length 830 [2021-11-19 04:50:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:19,309 INFO L470 AbstractCegarLoop]: Abstraction has 15048 states and 24221 transitions. [2021-11-19 04:50:19,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 15048 states and 24221 transitions. [2021-11-19 04:50:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2021-11-19 04:50:19,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:19,327 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 21, 21, 21, 21, 21, 21, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:19,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-11-19 04:50:19,327 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1295583596, now seen corresponding path program 1 times [2021-11-19 04:50:19,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:19,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604316320] [2021-11-19 04:50:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:19,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 3311 proven. 0 refuted. 0 times theorem prover too weak. 2949 trivial. 0 not checked. [2021-11-19 04:50:19,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:19,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604316320] [2021-11-19 04:50:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604316320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:19,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:19,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:19,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119421467] [2021-11-19 04:50:19,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:19,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:19,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:19,632 INFO L87 Difference]: Start difference. First operand 15048 states and 24221 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:21,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:22,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:22,516 INFO L93 Difference]: Finished difference Result 32073 states and 50991 transitions. [2021-11-19 04:50:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:22,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 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 833 [2021-11-19 04:50:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:22,535 INFO L225 Difference]: With dead ends: 32073 [2021-11-19 04:50:22,536 INFO L226 Difference]: Without dead ends: 17048 [2021-11-19 04:50:22,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:22,545 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 120 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:22,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 757 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:50:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17048 states. [2021-11-19 04:50:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17048 to 15048. [2021-11-19 04:50:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15048 states, 15047 states have (on average 1.6070313019206486) internal successors, (24181), 15047 states have internal predecessors, (24181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15048 states to 15048 states and 24181 transitions. [2021-11-19 04:50:23,044 INFO L78 Accepts]: Start accepts. Automaton has 15048 states and 24181 transitions. Word has length 833 [2021-11-19 04:50:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:23,044 INFO L470 AbstractCegarLoop]: Abstraction has 15048 states and 24181 transitions. [2021-11-19 04:50:23,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 15048 states and 24181 transitions. [2021-11-19 04:50:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2021-11-19 04:50:23,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:23,062 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 23, 23, 23, 21, 21, 21, 21, 21, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:23,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-19 04:50:23,063 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:23,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1316696081, now seen corresponding path program 1 times [2021-11-19 04:50:23,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:23,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049042093] [2021-11-19 04:50:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:23,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6326 backedges. 3358 proven. 0 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2021-11-19 04:50:23,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:23,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049042093] [2021-11-19 04:50:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049042093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:23,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:23,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:23,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483648466] [2021-11-19 04:50:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:23,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:23,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:23,411 INFO L87 Difference]: Start difference. First operand 15048 states and 24181 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:25,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:26,282 INFO L93 Difference]: Finished difference Result 32073 states and 50911 transitions. [2021-11-19 04:50:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 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 836 [2021-11-19 04:50:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:26,303 INFO L225 Difference]: With dead ends: 32073 [2021-11-19 04:50:26,303 INFO L226 Difference]: Without dead ends: 17048 [2021-11-19 04:50:26,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:26,313 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 118 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:26,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 755 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:50:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17048 states. [2021-11-19 04:50:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17048 to 15048. [2021-11-19 04:50:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15048 states, 15047 states have (on average 1.6043729647105736) internal successors, (24141), 15047 states have internal predecessors, (24141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15048 states to 15048 states and 24141 transitions. [2021-11-19 04:50:26,792 INFO L78 Accepts]: Start accepts. Automaton has 15048 states and 24141 transitions. Word has length 836 [2021-11-19 04:50:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:26,793 INFO L470 AbstractCegarLoop]: Abstraction has 15048 states and 24141 transitions. [2021-11-19 04:50:26,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 15048 states and 24141 transitions. [2021-11-19 04:50:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2021-11-19 04:50:26,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:26,814 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 21, 21, 21, 21, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:26,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-19 04:50:26,814 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1764357777, now seen corresponding path program 1 times [2021-11-19 04:50:26,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:26,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659773456] [2021-11-19 04:50:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:26,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6392 backedges. 3405 proven. 0 refuted. 0 times theorem prover too weak. 2987 trivial. 0 not checked. [2021-11-19 04:50:27,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:27,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659773456] [2021-11-19 04:50:27,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659773456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:27,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:27,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:27,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357399517] [2021-11-19 04:50:27,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:27,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:27,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:27,126 INFO L87 Difference]: Start difference. First operand 15048 states and 24141 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:29,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:30,093 INFO L93 Difference]: Finished difference Result 31873 states and 50591 transitions. [2021-11-19 04:50:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:30,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 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 839 [2021-11-19 04:50:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:30,111 INFO L225 Difference]: With dead ends: 31873 [2021-11-19 04:50:30,111 INFO L226 Difference]: Without dead ends: 16848 [2021-11-19 04:50:30,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:30,117 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 109 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:30,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 741 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:50:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16848 states. [2021-11-19 04:50:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16848 to 15048. [2021-11-19 04:50:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15048 states, 15047 states have (on average 1.6017146275004985) internal successors, (24101), 15047 states have internal predecessors, (24101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15048 states to 15048 states and 24101 transitions. [2021-11-19 04:50:30,598 INFO L78 Accepts]: Start accepts. Automaton has 15048 states and 24101 transitions. Word has length 839 [2021-11-19 04:50:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:30,598 INFO L470 AbstractCegarLoop]: Abstraction has 15048 states and 24101 transitions. [2021-11-19 04:50:30,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 15048 states and 24101 transitions. [2021-11-19 04:50:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-11-19 04:50:30,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:30,617 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:30,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-19 04:50:30,617 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash 855496686, now seen corresponding path program 1 times [2021-11-19 04:50:30,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:30,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121154945] [2021-11-19 04:50:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:30,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6836 backedges. 3737 proven. 0 refuted. 0 times theorem prover too weak. 3099 trivial. 0 not checked. [2021-11-19 04:50:30,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:30,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121154945] [2021-11-19 04:50:30,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121154945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:30,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:30,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:30,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044861174] [2021-11-19 04:50:30,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:30,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:30,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:30,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:30,939 INFO L87 Difference]: Start difference. First operand 15048 states and 24101 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:32,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:33,956 INFO L93 Difference]: Finished difference Result 31873 states and 50511 transitions. [2021-11-19 04:50:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 848 [2021-11-19 04:50:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:33,973 INFO L225 Difference]: With dead ends: 31873 [2021-11-19 04:50:33,973 INFO L226 Difference]: Without dead ends: 16848 [2021-11-19 04:50:33,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:33,979 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 101 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:33,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 739 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:50:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16848 states. [2021-11-19 04:50:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16848 to 15048. [2021-11-19 04:50:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15048 states, 15047 states have (on average 1.5990562902904233) internal successors, (24061), 15047 states have internal predecessors, (24061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15048 states to 15048 states and 24061 transitions. [2021-11-19 04:50:34,382 INFO L78 Accepts]: Start accepts. Automaton has 15048 states and 24061 transitions. Word has length 848 [2021-11-19 04:50:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:34,383 INFO L470 AbstractCegarLoop]: Abstraction has 15048 states and 24061 transitions. [2021-11-19 04:50:34,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 15048 states and 24061 transitions. [2021-11-19 04:50:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-11-19 04:50:34,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:34,406 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:34,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-19 04:50:34,406 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:34,407 INFO L85 PathProgramCache]: Analyzing trace with hash -653887438, now seen corresponding path program 1 times [2021-11-19 04:50:34,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:34,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904444722] [2021-11-19 04:50:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:34,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 3778 proven. 0 refuted. 0 times theorem prover too weak. 3118 trivial. 0 not checked. [2021-11-19 04:50:34,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:34,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904444722] [2021-11-19 04:50:34,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904444722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:34,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:34,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:34,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311042124] [2021-11-19 04:50:34,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:34,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:34,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:34,748 INFO L87 Difference]: Start difference. First operand 15048 states and 24061 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:36,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:37,718 INFO L93 Difference]: Finished difference Result 31713 states and 50203 transitions. [2021-11-19 04:50:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 851 [2021-11-19 04:50:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:37,737 INFO L225 Difference]: With dead ends: 31713 [2021-11-19 04:50:37,737 INFO L226 Difference]: Without dead ends: 16688 [2021-11-19 04:50:37,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:37,751 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 95 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:37,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 731 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 251 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 04:50:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16688 states. [2021-11-19 04:50:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16688 to 15048. [2021-11-19 04:50:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15048 states, 15047 states have (on average 1.5963979530803483) internal successors, (24021), 15047 states have internal predecessors, (24021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15048 states to 15048 states and 24021 transitions. [2021-11-19 04:50:38,252 INFO L78 Accepts]: Start accepts. Automaton has 15048 states and 24021 transitions. Word has length 851 [2021-11-19 04:50:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:38,252 INFO L470 AbstractCegarLoop]: Abstraction has 15048 states and 24021 transitions. [2021-11-19 04:50:38,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 15048 states and 24021 transitions. [2021-11-19 04:50:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-11-19 04:50:38,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:38,271 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:38,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-11-19 04:50:38,272 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash -570468491, now seen corresponding path program 1 times [2021-11-19 04:50:38,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:38,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665918350] [2021-11-19 04:50:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:38,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6959 backedges. 3806 proven. 0 refuted. 0 times theorem prover too weak. 3153 trivial. 0 not checked. [2021-11-19 04:50:38,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:38,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665918350] [2021-11-19 04:50:38,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665918350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:38,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:38,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:38,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196420395] [2021-11-19 04:50:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:38,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:38,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:38,552 INFO L87 Difference]: Start difference. First operand 15048 states and 24021 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:40,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:40,991 INFO L93 Difference]: Finished difference Result 31953 states and 50919 transitions. [2021-11-19 04:50:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:40,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 851 [2021-11-19 04:50:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:41,009 INFO L225 Difference]: With dead ends: 31953 [2021-11-19 04:50:41,009 INFO L226 Difference]: Without dead ends: 16928 [2021-11-19 04:50:41,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:41,019 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 44 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:41,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 631 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:50:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16928 states. [2021-11-19 04:50:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16928 to 16068. [2021-11-19 04:50:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16068 states, 16067 states have (on average 1.6058380531524241) internal successors, (25801), 16067 states have internal predecessors, (25801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16068 states to 16068 states and 25801 transitions. [2021-11-19 04:50:41,433 INFO L78 Accepts]: Start accepts. Automaton has 16068 states and 25801 transitions. Word has length 851 [2021-11-19 04:50:41,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:41,434 INFO L470 AbstractCegarLoop]: Abstraction has 16068 states and 25801 transitions. [2021-11-19 04:50:41,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:41,434 INFO L276 IsEmpty]: Start isEmpty. Operand 16068 states and 25801 transitions. [2021-11-19 04:50:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2021-11-19 04:50:41,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:41,517 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:41,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-11-19 04:50:41,518 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:41,518 INFO L85 PathProgramCache]: Analyzing trace with hash 407021035, now seen corresponding path program 1 times [2021-11-19 04:50:41,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:41,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617521824] [2021-11-19 04:50:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:41,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7175 backedges. 3954 proven. 0 refuted. 0 times theorem prover too weak. 3221 trivial. 0 not checked. [2021-11-19 04:50:41,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:41,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617521824] [2021-11-19 04:50:41,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617521824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:50:41,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:50:41,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:50:41,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246066844] [2021-11-19 04:50:41,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:50:41,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:50:41,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:50:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:50:41,792 INFO L87 Difference]: Start difference. First operand 16068 states and 25801 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:43,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:44,548 INFO L93 Difference]: Finished difference Result 33453 states and 53637 transitions. [2021-11-19 04:50:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:50:44,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 860 [2021-11-19 04:50:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:44,567 INFO L225 Difference]: With dead ends: 33453 [2021-11-19 04:50:44,568 INFO L226 Difference]: Without dead ends: 17408 [2021-11-19 04:50:44,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:50:44,578 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 58 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:44,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 695 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:50:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17408 states. [2021-11-19 04:50:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17408 to 16668. [2021-11-19 04:50:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16668 states, 16667 states have (on average 1.611627767444651) internal successors, (26861), 16667 states have internal predecessors, (26861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16668 states to 16668 states and 26861 transitions. [2021-11-19 04:50:45,014 INFO L78 Accepts]: Start accepts. Automaton has 16668 states and 26861 transitions. Word has length 860 [2021-11-19 04:50:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:45,014 INFO L470 AbstractCegarLoop]: Abstraction has 16668 states and 26861 transitions. [2021-11-19 04:50:45,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 16668 states and 26861 transitions. [2021-11-19 04:50:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2021-11-19 04:50:45,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:45,036 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 19, 19, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:45,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-11-19 04:50:45,036 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1326089202, now seen corresponding path program 1 times [2021-11-19 04:50:45,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:45,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710500398] [2021-11-19 04:50:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:45,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7358 backedges. 1959 proven. 4948 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2021-11-19 04:50:50,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:50,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710500398] [2021-11-19 04:50:50,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710500398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:50,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155280398] [2021-11-19 04:50:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:50,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:50,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:50,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcad14e4-5263-416d-99a1-d8a00626284d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:50:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-19 04:50:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:51,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:51,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 04:50:51,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:51,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:51,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:51,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:50:51,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-11-19 04:50:52,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-19 04:50:53,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:50:54,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:54,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-11-19 04:50:54,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:54,179 INFO L354 Elim1Store]: treesize reduction 100, result has 32.4 percent of original size [2021-11-19 04:50:54,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 91 [2021-11-19 04:50:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:54,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 66 [2021-11-19 04:50:55,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 107 [2021-11-19 04:50:55,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,535 INFO L354 Elim1Store]: treesize reduction 155, result has 11.9 percent of original size [2021-11-19 04:50:55,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 110 treesize of output 103 [2021-11-19 04:50:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 69 [2021-11-19 04:50:55,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 84 [2021-11-19 04:50:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,675 INFO L354 Elim1Store]: treesize reduction 155, result has 11.9 percent of original size [2021-11-19 04:50:55,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 81 treesize of output 80 [2021-11-19 04:50:55,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:55,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 52 [2021-11-19 04:50:56,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:56,591 INFO L354 Elim1Store]: treesize reduction 148, result has 36.8 percent of original size [2021-11-19 04:50:56,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 196 treesize of output 211 [2021-11-19 04:50:56,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:56,698 INFO L354 Elim1Store]: treesize reduction 78, result has 43.5 percent of original size [2021-11-19 04:50:56,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 205 [2021-11-19 04:50:56,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:56,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:56,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:50:56,838 INFO L354 Elim1Store]: treesize reduction 135, result has 44.9 percent of original size [2021-11-19 04:50:56,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 200 treesize of output 266 [2021-11-19 04:51:51,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,468 INFO L354 Elim1Store]: treesize reduction 138, result has 33.3 percent of original size [2021-11-19 04:51:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 472 treesize of output 456 [2021-11-19 04:51:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,706 INFO L354 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2021-11-19 04:51:51,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 513 treesize of output 469 [2021-11-19 04:51:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:51,996 INFO L354 Elim1Store]: treesize reduction 128, result has 33.7 percent of original size [2021-11-19 04:51:51,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 532 treesize of output 496 [2021-11-19 04:51:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:52,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:52,085 INFO L354 Elim1Store]: treesize reduction 146, result has 24.4 percent of original size [2021-11-19 04:51:52,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 575 treesize of output 513 [2021-11-19 04:51:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:52,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:51:52,132 INFO L354 Elim1Store]: treesize reduction 127, result has 6.6 percent of original size [2021-11-19 04:51:52,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 596 treesize of output 566