./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label38.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label38.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU --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 96ba89cb3a10a6781dfc1b6622655a925bd28641990009005f1ed4397d7ee8ac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:19:07,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:19:07,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:19:07,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:19:07,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:19:07,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:19:07,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:19:07,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:19:07,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:19:07,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:19:07,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:19:07,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:19:07,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:19:07,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:19:07,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:19:07,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:19:07,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:19:07,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:19:07,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:19:07,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:19:07,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:19:07,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:19:07,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:19:07,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:19:07,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:19:07,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:19:07,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:19:07,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:19:07,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:19:07,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:19:07,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:19:07,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:19:07,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:19:07,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:19:07,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:19:07,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:19:07,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:19:07,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:19:07,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:19:07,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:19:07,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:19:07,820 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:19:07,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:19:07,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:19:07,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:19:07,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:19:07,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:19:07,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:19:07,869 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:19:07,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:19:07,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:19:07,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:19:07,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:19:07,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:19:07,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:19:07,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:19:07,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:19:07,871 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:19:07,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:19:07,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:19:07,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:19:07,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:19:07,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:19:07,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:19:07,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:07,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:19:07,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:19:07,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:19:07,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:19:07,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:19:07,874 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:19:07,874 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:19:07,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:19:07,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:19:07,875 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_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96ba89cb3a10a6781dfc1b6622655a925bd28641990009005f1ed4397d7ee8ac [2021-11-02 22:19:08,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:19:08,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:19:08,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:19:08,155 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:19:08,156 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:19:08,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem12_label38.c [2021-11-02 22:19:08,264 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/data/4d632666d/4a2bba0ac7be4d59bf4a13f407614541/FLAG24ea1e559 [2021-11-02 22:19:09,023 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:19:09,023 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/sv-benchmarks/c/eca-rers2012/Problem12_label38.c [2021-11-02 22:19:09,057 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/data/4d632666d/4a2bba0ac7be4d59bf4a13f407614541/FLAG24ea1e559 [2021-11-02 22:19:09,137 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/data/4d632666d/4a2bba0ac7be4d59bf4a13f407614541 [2021-11-02 22:19:09,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:19:09,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:19:09,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:09,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:19:09,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:19:09,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d8a194c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09, skipping insertion in model container [2021-11-02 22:19:09,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:19:09,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:19:09,574 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/sv-benchmarks/c/eca-rers2012/Problem12_label38.c[3304,3317] [2021-11-02 22:19:10,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:10,880 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:19:10,915 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/sv-benchmarks/c/eca-rers2012/Problem12_label38.c[3304,3317] [2021-11-02 22:19:11,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:11,600 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:19:11,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11 WrapperNode [2021-11-02 22:19:11,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:11,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:11,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:19:11,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:19:11,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:11,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:12,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:19:12,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:19:12,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:19:12,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:19:12,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:19:12,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:19:12,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:19:12,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (1/1) ... [2021-11-02 22:19:12,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:12,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:12,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:19:12,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:19:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:19:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:19:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:19:12,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:19:18,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:19:18,278 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-02 22:19:18,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:19:18 BoogieIcfgContainer [2021-11-02 22:19:18,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:19:18,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:19:18,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:19:18,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:19:18,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:19:09" (1/3) ... [2021-11-02 22:19:18,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6ff392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:19:18, skipping insertion in model container [2021-11-02 22:19:18,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:11" (2/3) ... [2021-11-02 22:19:18,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6ff392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:19:18, skipping insertion in model container [2021-11-02 22:19:18,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:19:18" (3/3) ... [2021-11-02 22:19:18,297 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label38.c [2021-11-02 22:19:18,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:19:18,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:19:18,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:19:18,402 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 [2021-11-02 22:19:18,402 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:19:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:18,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:19:18,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:18,459 INFO L513 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] [2021-11-02 22:19:18,460 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2021-11-02 22:19:18,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:18,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814920539] [2021-11-02 22:19:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:18,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:18,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:18,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814920539] [2021-11-02 22:19:18,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814920539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:18,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:18,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:19:18,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156859207] [2021-11-02 22:19:18,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:18,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:18,819 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:24,380 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-02 22:19:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 22:19:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:24,431 INFO L225 Difference]: With dead ends: 2388 [2021-11-02 22:19:24,431 INFO L226 Difference]: Without dead ends: 1506 [2021-11-02 22:19:24,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-02 22:19:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-02 22:19:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-11-02 22:19:24,617 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 24 [2021-11-02 22:19:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:24,618 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-11-02 22:19:24,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-11-02 22:19:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:19:24,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:24,624 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:24,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:19:24,625 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash 317329089, now seen corresponding path program 1 times [2021-11-02 22:19:24,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:24,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122294151] [2021-11-02 22:19:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:24,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:24,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:24,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122294151] [2021-11-02 22:19:24,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122294151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:24,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:24,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:24,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294146458] [2021-11-02 22:19:24,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:24,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:24,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:24,860 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:29,851 INFO L93 Difference]: Finished difference Result 4512 states and 7393 transitions. [2021-11-02 22:19:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-02 22:19:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:29,871 INFO L225 Difference]: With dead ends: 4512 [2021-11-02 22:19:29,872 INFO L226 Difference]: Without dead ends: 3008 [2021-11-02 22:19:29,875 INFO L786 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 [2021-11-02 22:19:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-02 22:19:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-11-02 22:19:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.3634852011972065) internal successors, (4100), 3007 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4100 transitions. [2021-11-02 22:19:29,960 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4100 transitions. Word has length 95 [2021-11-02 22:19:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:29,961 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4100 transitions. [2021-11-02 22:19:29,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4100 transitions. [2021-11-02 22:19:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 22:19:29,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:29,969 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:29,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:19:29,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash 471546261, now seen corresponding path program 1 times [2021-11-02 22:19:29,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:29,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457190349] [2021-11-02 22:19:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:29,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:30,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:30,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457190349] [2021-11-02 22:19:30,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457190349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:30,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:30,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:19:30,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867378310] [2021-11-02 22:19:30,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:30,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:30,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:30,154 INFO L87 Difference]: Start difference. First operand 3008 states and 4100 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 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) [2021-11-02 22:19:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:34,117 INFO L93 Difference]: Finished difference Result 7516 states and 10661 transitions. [2021-11-02 22:19:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 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 98 [2021-11-02 22:19:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:34,147 INFO L225 Difference]: With dead ends: 7516 [2021-11-02 22:19:34,148 INFO L226 Difference]: Without dead ends: 4510 [2021-11-02 22:19:34,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-11-02 22:19:34,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-11-02 22:19:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.3251275227323132) internal successors, (5975), 4509 states have internal predecessors, (5975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5975 transitions. [2021-11-02 22:19:34,278 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5975 transitions. Word has length 98 [2021-11-02 22:19:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:34,281 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 5975 transitions. [2021-11-02 22:19:34,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 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) [2021-11-02 22:19:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5975 transitions. [2021-11-02 22:19:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-02 22:19:34,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:34,287 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:34,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:19:34,288 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:34,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1218297118, now seen corresponding path program 1 times [2021-11-02 22:19:34,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:34,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599372967] [2021-11-02 22:19:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:34,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:34,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:34,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599372967] [2021-11-02 22:19:34,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599372967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:34,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:34,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:34,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943980766] [2021-11-02 22:19:34,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:19:34,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:19:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:34,439 INFO L87 Difference]: Start difference. First operand 4510 states and 5975 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 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) [2021-11-02 22:19:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:39,539 INFO L93 Difference]: Finished difference Result 14275 states and 18791 transitions. [2021-11-02 22:19:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:19:39,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 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 109 [2021-11-02 22:19:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:39,610 INFO L225 Difference]: With dead ends: 14275 [2021-11-02 22:19:39,610 INFO L226 Difference]: Without dead ends: 9767 [2021-11-02 22:19:39,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-11-02 22:19:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9016. [2021-11-02 22:19:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9016 states, 9015 states have (on average 1.303716028840821) internal successors, (11753), 9015 states have internal predecessors, (11753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 11753 transitions. [2021-11-02 22:19:39,834 INFO L78 Accepts]: Start accepts. Automaton has 9016 states and 11753 transitions. Word has length 109 [2021-11-02 22:19:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:39,835 INFO L470 AbstractCegarLoop]: Abstraction has 9016 states and 11753 transitions. [2021-11-02 22:19:39,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 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) [2021-11-02 22:19:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 9016 states and 11753 transitions. [2021-11-02 22:19:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-02 22:19:39,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:39,840 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:19:39,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:19:39,840 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash 405132111, now seen corresponding path program 1 times [2021-11-02 22:19:39,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:39,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652108456] [2021-11-02 22:19:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:39,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-02 22:19:39,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:39,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652108456] [2021-11-02 22:19:39,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652108456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:39,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:39,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:39,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273072727] [2021-11-02 22:19:39,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:19:39,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:19:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:39,982 INFO L87 Difference]: Start difference. First operand 9016 states and 11753 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:44,080 INFO L93 Difference]: Finished difference Result 22573 states and 30202 transitions. [2021-11-02 22:19:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:19:44,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-11-02 22:19:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:44,135 INFO L225 Difference]: With dead ends: 22573 [2021-11-02 22:19:44,135 INFO L226 Difference]: Without dead ends: 12771 [2021-11-02 22:19:44,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-11-02 22:19:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 12771. [2021-11-02 22:19:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 12770 states have (on average 1.2169929522317933) internal successors, (15541), 12770 states have internal predecessors, (15541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 15541 transitions. [2021-11-02 22:19:44,399 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 15541 transitions. Word has length 228 [2021-11-02 22:19:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:44,400 INFO L470 AbstractCegarLoop]: Abstraction has 12771 states and 15541 transitions. [2021-11-02 22:19:44,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 15541 transitions. [2021-11-02 22:19:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-02 22:19:44,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:44,405 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:44,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:19:44,405 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash -500495800, now seen corresponding path program 1 times [2021-11-02 22:19:44,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:44,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161269710] [2021-11-02 22:19:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:44,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-02 22:19:44,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:44,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161269710] [2021-11-02 22:19:44,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161269710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:44,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:44,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:44,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180612342] [2021-11-02 22:19:44,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:44,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:44,542 INFO L87 Difference]: Start difference. First operand 12771 states and 15541 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) [2021-11-02 22:19:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:47,640 INFO L93 Difference]: Finished difference Result 24789 states and 30324 transitions. [2021-11-02 22:19:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:47,641 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 254 [2021-11-02 22:19:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:47,668 INFO L225 Difference]: With dead ends: 24789 [2021-11-02 22:19:47,668 INFO L226 Difference]: Without dead ends: 12771 [2021-11-02 22:19:47,680 INFO L786 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 [2021-11-02 22:19:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-11-02 22:19:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 12771. [2021-11-02 22:19:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 12770 states have (on average 1.1699295223179327) internal successors, (14940), 12770 states have internal predecessors, (14940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 14940 transitions. [2021-11-02 22:19:47,886 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 14940 transitions. Word has length 254 [2021-11-02 22:19:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:47,887 INFO L470 AbstractCegarLoop]: Abstraction has 12771 states and 14940 transitions. [2021-11-02 22:19:47,887 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) [2021-11-02 22:19:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 14940 transitions. [2021-11-02 22:19:47,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-02 22:19:47,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:47,896 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:47,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:19:47,897 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2082907183, now seen corresponding path program 1 times [2021-11-02 22:19:47,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:47,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439704837] [2021-11-02 22:19:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:47,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-02 22:19:48,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:48,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439704837] [2021-11-02 22:19:48,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439704837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:48,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:48,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:19:48,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020028171] [2021-11-02 22:19:48,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:48,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:48,064 INFO L87 Difference]: Start difference. First operand 12771 states and 14940 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:51,270 INFO L93 Difference]: Finished difference Result 33052 states and 39324 transitions. [2021-11-02 22:19:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:51,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 344 [2021-11-02 22:19:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:51,310 INFO L225 Difference]: With dead ends: 33052 [2021-11-02 22:19:51,310 INFO L226 Difference]: Without dead ends: 18781 [2021-11-02 22:19:51,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18781 states. [2021-11-02 22:19:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18781 to 18028. [2021-11-02 22:19:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18028 states, 18027 states have (on average 1.1498862816885782) internal successors, (20729), 18027 states have internal predecessors, (20729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18028 states to 18028 states and 20729 transitions. [2021-11-02 22:19:51,662 INFO L78 Accepts]: Start accepts. Automaton has 18028 states and 20729 transitions. Word has length 344 [2021-11-02 22:19:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:51,663 INFO L470 AbstractCegarLoop]: Abstraction has 18028 states and 20729 transitions. [2021-11-02 22:19:51,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 18028 states and 20729 transitions. [2021-11-02 22:19:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-11-02 22:19:51,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:51,677 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:51,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:19:51,677 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1667359272, now seen corresponding path program 1 times [2021-11-02 22:19:51,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:51,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105535746] [2021-11-02 22:19:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:51,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-02 22:19:51,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:51,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105535746] [2021-11-02 22:19:51,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105535746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:51,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:51,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:51,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804625652] [2021-11-02 22:19:51,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:51,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:51,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:51,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:51,920 INFO L87 Difference]: Start difference. First operand 18028 states and 20729 transitions. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:55,356 INFO L93 Difference]: Finished difference Result 42813 states and 49976 transitions. [2021-11-02 22:19:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 430 [2021-11-02 22:19:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:55,409 INFO L225 Difference]: With dead ends: 42813 [2021-11-02 22:19:55,409 INFO L226 Difference]: Without dead ends: 25538 [2021-11-02 22:19:55,431 INFO L786 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 [2021-11-02 22:19:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25538 states. [2021-11-02 22:19:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25538 to 24787. [2021-11-02 22:19:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24787 states, 24786 states have (on average 1.1381424997982732) internal successors, (28210), 24786 states have internal predecessors, (28210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24787 states to 24787 states and 28210 transitions. [2021-11-02 22:19:55,840 INFO L78 Accepts]: Start accepts. Automaton has 24787 states and 28210 transitions. Word has length 430 [2021-11-02 22:19:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:55,841 INFO L470 AbstractCegarLoop]: Abstraction has 24787 states and 28210 transitions. [2021-11-02 22:19:55,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 24787 states and 28210 transitions. [2021-11-02 22:19:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-02 22:19:55,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:55,857 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:55,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:19:55,859 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash -389450428, now seen corresponding path program 1 times [2021-11-02 22:19:55,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:55,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425672807] [2021-11-02 22:19:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:55,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 22:19:56,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:56,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425672807] [2021-11-02 22:19:56,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425672807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:56,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:56,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:56,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742510713] [2021-11-02 22:19:56,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:56,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:56,117 INFO L87 Difference]: Start difference. First operand 24787 states and 28210 transitions. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:59,995 INFO L93 Difference]: Finished difference Result 67598 states and 77604 transitions. [2021-11-02 22:19:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:59,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 438 [2021-11-02 22:19:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:00,059 INFO L225 Difference]: With dead ends: 67598 [2021-11-02 22:20:00,060 INFO L226 Difference]: Without dead ends: 43564 [2021-11-02 22:20:00,074 INFO L786 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 [2021-11-02 22:20:00,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43564 states. [2021-11-02 22:20:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43564 to 42811. [2021-11-02 22:20:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42811 states, 42810 states have (on average 1.1234991824340108) internal successors, (48097), 42810 states have internal predecessors, (48097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42811 states to 42811 states and 48097 transitions. [2021-11-02 22:20:00,710 INFO L78 Accepts]: Start accepts. Automaton has 42811 states and 48097 transitions. Word has length 438 [2021-11-02 22:20:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:00,711 INFO L470 AbstractCegarLoop]: Abstraction has 42811 states and 48097 transitions. [2021-11-02 22:20:00,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 42811 states and 48097 transitions. [2021-11-02 22:20:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-02 22:20:00,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:00,734 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:00,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:20:00,735 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash 490250510, now seen corresponding path program 1 times [2021-11-02 22:20:00,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:00,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362678491] [2021-11-02 22:20:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:00,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 322 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:01,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:01,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362678491] [2021-11-02 22:20:01,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362678491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:01,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529580430] [2021-11-02 22:20:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:01,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:01,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:01,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:01,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:20:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:20:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 22:20:02,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529580430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:02,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:02,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-02 22:20:02,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355603239] [2021-11-02 22:20:02,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:02,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:02,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:02,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:02,599 INFO L87 Difference]: Start difference. First operand 42811 states and 48097 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:06,332 INFO L93 Difference]: Finished difference Result 88624 states and 99314 transitions. [2021-11-02 22:20:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:06,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-11-02 22:20:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:06,392 INFO L225 Difference]: With dead ends: 88624 [2021-11-02 22:20:06,393 INFO L226 Difference]: Without dead ends: 46566 [2021-11-02 22:20:06,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:06,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46566 states. [2021-11-02 22:20:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46566 to 46566. [2021-11-02 22:20:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46566 states, 46565 states have (on average 1.0972189412648985) internal successors, (51092), 46565 states have internal predecessors, (51092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46566 states to 46566 states and 51092 transitions. [2021-11-02 22:20:07,281 INFO L78 Accepts]: Start accepts. Automaton has 46566 states and 51092 transitions. Word has length 442 [2021-11-02 22:20:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:07,282 INFO L470 AbstractCegarLoop]: Abstraction has 46566 states and 51092 transitions. [2021-11-02 22:20:07,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 46566 states and 51092 transitions. [2021-11-02 22:20:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-11-02 22:20:07,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:07,300 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:07,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:07,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:20:07,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash 296221119, now seen corresponding path program 1 times [2021-11-02 22:20:07,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:07,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943824992] [2021-11-02 22:20:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:07,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 106 proven. 229 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-02 22:20:07,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:07,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943824992] [2021-11-02 22:20:07,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943824992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:07,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639209095] [2021-11-02 22:20:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:07,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:07,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:07,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:20:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:08,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:20:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-02 22:20:09,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639209095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:09,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:09,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 22:20:09,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786660919] [2021-11-02 22:20:09,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:09,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:09,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:09,307 INFO L87 Difference]: Start difference. First operand 46566 states and 51092 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:13,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:13,130 INFO L93 Difference]: Finished difference Result 120166 states and 132823 transitions. [2021-11-02 22:20:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:13,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 448 [2021-11-02 22:20:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:13,206 INFO L225 Difference]: With dead ends: 120166 [2021-11-02 22:20:13,206 INFO L226 Difference]: Without dead ends: 74353 [2021-11-02 22:20:13,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:13,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74353 states. [2021-11-02 22:20:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74353 to 72851. [2021-11-02 22:20:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72851 states, 72850 states have (on average 1.1021002059025395) internal successors, (80288), 72850 states have internal predecessors, (80288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72851 states to 72851 states and 80288 transitions. [2021-11-02 22:20:14,186 INFO L78 Accepts]: Start accepts. Automaton has 72851 states and 80288 transitions. Word has length 448 [2021-11-02 22:20:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:14,187 INFO L470 AbstractCegarLoop]: Abstraction has 72851 states and 80288 transitions. [2021-11-02 22:20:14,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 72851 states and 80288 transitions. [2021-11-02 22:20:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-11-02 22:20:14,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:14,202 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:14,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:14,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fcd7227-0c2d-4cd4-9dae-e7382f16d498/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:14,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -431432558, now seen corresponding path program 1 times [2021-11-02 22:20:14,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:14,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424450366] [2021-11-02 22:20:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:14,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-02 22:20:14,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:14,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424450366] [2021-11-02 22:20:14,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424450366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:14,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:14,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:14,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365835175] [2021-11-02 22:20:14,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:14,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:14,992 INFO L87 Difference]: Start difference. First operand 72851 states and 80288 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:19,930 INFO L93 Difference]: Finished difference Result 177242 states and 195862 transitions. [2021-11-02 22:20:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-11-02 22:20:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:20,293 INFO L225 Difference]: With dead ends: 177242 [2021-11-02 22:20:20,293 INFO L226 Difference]: Without dead ends: 105144 [2021-11-02 22:20:20,355 INFO L786 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 [2021-11-02 22:20:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105144 states. [2021-11-02 22:20:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105144 to 102891. [2021-11-02 22:20:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 102890 states have (on average 1.1006997764602975) internal successors, (113251), 102890 states have internal predecessors, (113251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 113251 transitions. [2021-11-02 22:20:22,521 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 113251 transitions. Word has length 458 [2021-11-02 22:20:22,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:22,522 INFO L470 AbstractCegarLoop]: Abstraction has 102891 states and 113251 transitions. [2021-11-02 22:20:22,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 113251 transitions. [2021-11-02 22:20:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-11-02 22:20:22,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:22,572 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:20:22,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:20:22,573 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2061470705, now seen corresponding path program 1 times [2021-11-02 22:20:22,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:22,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256000500] [2021-11-02 22:20:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:22,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 349 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 22:20:22,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:22,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256000500] [2021-11-02 22:20:22,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256000500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:22,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:22,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:22,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310624392] [2021-11-02 22:20:22,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:22,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:22,912 INFO L87 Difference]: Start difference. First operand 102891 states and 113251 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:27,770 INFO L93 Difference]: Finished difference Result 244832 states and 270809 transitions. [2021-11-02 22:20:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 495 [2021-11-02 22:20:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:27,955 INFO L225 Difference]: With dead ends: 244832 [2021-11-02 22:20:27,955 INFO L226 Difference]: Without dead ends: 142694 [2021-11-02 22:20:28,010 INFO L786 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 [2021-11-02 22:20:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142694 states. [2021-11-02 22:20:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142694 to 139690. [2021-11-02 22:20:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139690 states, 139689 states have (on average 1.0851892418157478) internal successors, (151589), 139689 states have internal predecessors, (151589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139690 states to 139690 states and 151589 transitions. [2021-11-02 22:20:30,293 INFO L78 Accepts]: Start accepts. Automaton has 139690 states and 151589 transitions. Word has length 495 [2021-11-02 22:20:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:30,294 INFO L470 AbstractCegarLoop]: Abstraction has 139690 states and 151589 transitions. [2021-11-02 22:20:30,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 139690 states and 151589 transitions. [2021-11-02 22:20:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-11-02 22:20:30,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:30,355 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:30,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:20:30,356 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:30,356 INFO L85 PathProgramCache]: Analyzing trace with hash 237681513, now seen corresponding path program 1 times [2021-11-02 22:20:30,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:30,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764917691] [2021-11-02 22:20:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:30,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-02 22:20:30,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:30,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764917691] [2021-11-02 22:20:30,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764917691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:30,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:30,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:30,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884740451] [2021-11-02 22:20:30,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:30,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:30,735 INFO L87 Difference]: Start difference. First operand 139690 states and 151589 transitions. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:35,364 INFO L93 Difference]: Finished difference Result 301157 states and 327108 transitions. [2021-11-02 22:20:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 528 [2021-11-02 22:20:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:35,556 INFO L225 Difference]: With dead ends: 301157 [2021-11-02 22:20:35,556 INFO L226 Difference]: Without dead ends: 162220 [2021-11-02 22:20:35,611 INFO L786 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 [2021-11-02 22:20:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162220 states. [2021-11-02 22:20:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162220 to 139690. [2021-11-02 22:20:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139690 states, 139689 states have (on average 1.0851892418157478) internal successors, (151589), 139689 states have internal predecessors, (151589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139690 states to 139690 states and 151589 transitions. [2021-11-02 22:20:38,037 INFO L78 Accepts]: Start accepts. Automaton has 139690 states and 151589 transitions. Word has length 528 [2021-11-02 22:20:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:38,037 INFO L470 AbstractCegarLoop]: Abstraction has 139690 states and 151589 transitions. [2021-11-02 22:20:38,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 139690 states and 151589 transitions. [2021-11-02 22:20:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-11-02 22:20:38,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:38,060 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:38,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:20:38,060 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 33789845, now seen corresponding path program 1 times [2021-11-02 22:20:38,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:38,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96995954] [2021-11-02 22:20:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:38,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-02 22:20:38,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:38,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96995954] [2021-11-02 22:20:38,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96995954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:38,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:38,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:38,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254034770] [2021-11-02 22:20:38,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:38,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:38,349 INFO L87 Difference]: Start difference. First operand 139690 states and 151589 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:42,583 INFO L93 Difference]: Finished difference Result 312422 states and 339779 transitions. [2021-11-02 22:20:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:42,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 540 [2021-11-02 22:20:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:42,784 INFO L225 Difference]: With dead ends: 312422 [2021-11-02 22:20:42,785 INFO L226 Difference]: Without dead ends: 173485 [2021-11-02 22:20:42,844 INFO L786 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 [2021-11-02 22:20:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173485 states. [2021-11-02 22:20:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173485 to 167477. [2021-11-02 22:20:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167477 states, 167476 states have (on average 1.0788292053786812) internal successors, (180678), 167476 states have internal predecessors, (180678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167477 states to 167477 states and 180678 transitions. [2021-11-02 22:20:46,048 INFO L78 Accepts]: Start accepts. Automaton has 167477 states and 180678 transitions. Word has length 540 [2021-11-02 22:20:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:46,048 INFO L470 AbstractCegarLoop]: Abstraction has 167477 states and 180678 transitions. [2021-11-02 22:20:46,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 167477 states and 180678 transitions. [2021-11-02 22:20:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-11-02 22:20:46,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:46,072 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:20:46,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:20:46,073 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2136260174, now seen corresponding path program 1 times [2021-11-02 22:20:46,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:46,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851441094] [2021-11-02 22:20:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:46,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 644 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-02 22:20:46,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:46,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851441094] [2021-11-02 22:20:46,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851441094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:46,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:46,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:46,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626082796] [2021-11-02 22:20:46,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:46,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:46,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:46,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:46,371 INFO L87 Difference]: Start difference. First operand 167477 states and 180678 transitions. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:51,290 INFO L93 Difference]: Finished difference Result 334201 states and 360598 transitions. [2021-11-02 22:20:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 579 [2021-11-02 22:20:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:51,516 INFO L225 Difference]: With dead ends: 334201 [2021-11-02 22:20:51,516 INFO L226 Difference]: Without dead ends: 167477 [2021-11-02 22:20:51,582 INFO L786 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 [2021-11-02 22:20:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167477 states. [2021-11-02 22:20:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167477 to 162220. [2021-11-02 22:20:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162220 states, 162219 states have (on average 1.0676554534302394) internal successors, (173194), 162219 states have internal predecessors, (173194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162220 states to 162220 states and 173194 transitions. [2021-11-02 22:20:54,417 INFO L78 Accepts]: Start accepts. Automaton has 162220 states and 173194 transitions. Word has length 579 [2021-11-02 22:20:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:54,418 INFO L470 AbstractCegarLoop]: Abstraction has 162220 states and 173194 transitions. [2021-11-02 22:20:54,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 162220 states and 173194 transitions. [2021-11-02 22:20:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-11-02 22:20:54,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:54,432 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:20:54,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:20:54,433 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:54,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1160208523, now seen corresponding path program 1 times [2021-11-02 22:20:54,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:54,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681872532] [2021-11-02 22:20:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:54,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 684 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-02 22:20:54,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:54,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681872532] [2021-11-02 22:20:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681872532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:54,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:54,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:54,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397916553] [2021-11-02 22:20:54,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:54,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:54,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:54,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:54,654 INFO L87 Difference]: Start difference. First operand 162220 states and 173194 transitions. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:59,460 INFO L93 Difference]: Finished difference Result 323687 states and 345630 transitions. [2021-11-02 22:20:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:59,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 601 [2021-11-02 22:20:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:59,705 INFO L225 Difference]: With dead ends: 323687 [2021-11-02 22:20:59,705 INFO L226 Difference]: Without dead ends: 162220 [2021-11-02 22:20:59,793 INFO L786 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 [2021-11-02 22:20:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162220 states. [2021-11-02 22:21:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162220 to 153959. [2021-11-02 22:21:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153959 states, 153958 states have (on average 1.0525857701451045) internal successors, (162054), 153958 states have internal predecessors, (162054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153959 states to 153959 states and 162054 transitions. [2021-11-02 22:21:02,359 INFO L78 Accepts]: Start accepts. Automaton has 153959 states and 162054 transitions. Word has length 601 [2021-11-02 22:21:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:02,360 INFO L470 AbstractCegarLoop]: Abstraction has 153959 states and 162054 transitions. [2021-11-02 22:21:02,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 153959 states and 162054 transitions. [2021-11-02 22:21:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2021-11-02 22:21:02,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:02,370 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:02,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:21:02,371 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1296899087, now seen corresponding path program 1 times [2021-11-02 22:21:02,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:02,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545502156] [2021-11-02 22:21:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:02,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-02 22:21:02,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:02,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545502156] [2021-11-02 22:21:02,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545502156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:02,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:02,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:21:02,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281637133] [2021-11-02 22:21:02,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:02,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:02,663 INFO L87 Difference]: Start difference. First operand 153959 states and 162054 transitions. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:09,730 INFO L93 Difference]: Finished difference Result 367996 states and 387412 transitions. [2021-11-02 22:21:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:09,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 602 [2021-11-02 22:21:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:10,044 INFO L225 Difference]: With dead ends: 367996 [2021-11-02 22:21:10,044 INFO L226 Difference]: Without dead ends: 214790 [2021-11-02 22:21:10,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214790 states.