./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0 --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 8852f5d85d99e238ddb4939d2a61f2cf9e42dc8f549b5b69b60dfda9c1201f88 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:07:20,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:07:20,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:07:20,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:07:20,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:07:20,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:07:20,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:07:20,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:07:20,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:07:20,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:07:20,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:07:20,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:07:20,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:07:20,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:07:20,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:07:20,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:07:20,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:07:20,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:07:20,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:07:20,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:07:20,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:07:20,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:07:20,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:07:20,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:07:20,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:07:20,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:07:20,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:07:20,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:07:20,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:07:20,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:07:20,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:07:20,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:07:20,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:07:20,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:07:20,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:07:20,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:07:20,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:07:20,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:07:20,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:07:20,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:07:20,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:07:20,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:07:21,010 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:07:21,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:07:21,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:07:21,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:07:21,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:07:21,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:07:21,014 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:07:21,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:07:21,015 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:07:21,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:07:21,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:07:21,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:07:21,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:07:21,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:07:21,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:07:21,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:07:21,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:07:21,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:07:21,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:07:21,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:07:21,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:07:21,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:07:21,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:07:21,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:07:21,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:07:21,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:07:21,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:07:21,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:07:21,021 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:07:21,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:07:21,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:07:21,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:07:21,024 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_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8852f5d85d99e238ddb4939d2a61f2cf9e42dc8f549b5b69b60dfda9c1201f88 [2021-11-22 15:07:21,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:07:21,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:07:21,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:07:21,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:07:21,365 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:07:21,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-22 15:07:21,464 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/data/1ef78c17b/632e4e5bd4334862b11147502ef099d5/FLAGba632db86 [2021-11-22 15:07:22,393 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:07:22,394 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-22 15:07:22,443 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/data/1ef78c17b/632e4e5bd4334862b11147502ef099d5/FLAGba632db86 [2021-11-22 15:07:22,856 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/data/1ef78c17b/632e4e5bd4334862b11147502ef099d5 [2021-11-22 15:07:22,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:07:22,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:07:22,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:07:22,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:07:22,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:07:22,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:07:22" (1/1) ... [2021-11-22 15:07:22,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454b4a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:22, skipping insertion in model container [2021-11-22 15:07:22,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:07:22" (1/1) ... [2021-11-22 15:07:22,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:07:23,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:07:23,541 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[8749,8762] [2021-11-22 15:07:23,642 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[16497,16510] [2021-11-22 15:07:24,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:07:24,721 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:07:24,780 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[8749,8762] [2021-11-22 15:07:24,798 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[16497,16510] [2021-11-22 15:07:25,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:07:25,527 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:07:25,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25 WrapperNode [2021-11-22 15:07:25,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:07:25,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:07:25,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:07:25,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:07:25,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:25,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,280 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5032 [2021-11-22 15:07:26,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:07:26,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:07:26,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:07:26,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:07:26,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:07:26,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:07:26,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:07:26,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:07:26,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (1/1) ... [2021-11-22 15:07:26,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:07:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:07:26,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:07:26,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:07:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:07:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:07:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:07:27,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:07:27,200 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:07:27,204 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:07:32,658 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:07:32,690 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:07:32,690 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 15:07:32,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:07:32 BoogieIcfgContainer [2021-11-22 15:07:32,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:07:32,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:07:32,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:07:32,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:07:32,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:07:22" (1/3) ... [2021-11-22 15:07:32,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1630ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:07:32, skipping insertion in model container [2021-11-22 15:07:32,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:07:25" (2/3) ... [2021-11-22 15:07:32,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1630ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:07:32, skipping insertion in model container [2021-11-22 15:07:32,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:07:32" (3/3) ... [2021-11-22 15:07:32,708 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-22 15:07:32,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:07:32,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:07:32,799 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:07:32,813 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 [2021-11-22 15:07:32,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:07:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 15:07:32,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:32,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:32,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2021-11-22 15:07:32,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:32,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837372836] [2021-11-22 15:07:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:32,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:33,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837372836] [2021-11-22 15:07:33,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837372836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:33,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:33,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:07:33,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718430437] [2021-11-22 15:07:33,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:33,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:07:33,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:07:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:07:33,275 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:33,402 INFO L93 Difference]: Finished difference Result 1759 states and 3336 transitions. [2021-11-22 15:07:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:07:33,409 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 15:07:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:33,493 INFO L225 Difference]: With dead ends: 1759 [2021-11-22 15:07:33,502 INFO L226 Difference]: Without dead ends: 829 [2021-11-22 15:07:33,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:07:33,521 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:33,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-22 15:07:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-11-22 15:07:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8899637243047158) internal successors, (1563), 828 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1563 transitions. [2021-11-22 15:07:33,672 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1563 transitions. Word has length 30 [2021-11-22 15:07:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:33,672 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1563 transitions. [2021-11-22 15:07:33,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1563 transitions. [2021-11-22 15:07:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 15:07:33,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:33,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:33,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:07:33,677 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2021-11-22 15:07:33,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:33,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919544344] [2021-11-22 15:07:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:33,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:33,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:33,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919544344] [2021-11-22 15:07:33,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919544344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:33,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:33,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:07:33,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677150682] [2021-11-22 15:07:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:33,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:07:33,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:07:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:07:33,956 INFO L87 Difference]: Start difference. First operand 829 states and 1563 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:34,157 INFO L93 Difference]: Finished difference Result 879 states and 1639 transitions. [2021-11-22 15:07:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:07:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 15:07:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:34,165 INFO L225 Difference]: With dead ends: 879 [2021-11-22 15:07:34,165 INFO L226 Difference]: Without dead ends: 829 [2021-11-22 15:07:34,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:07:34,168 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:34,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-22 15:07:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-11-22 15:07:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8621523579201935) internal successors, (1540), 828 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1540 transitions. [2021-11-22 15:07:34,199 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1540 transitions. Word has length 30 [2021-11-22 15:07:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:34,200 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1540 transitions. [2021-11-22 15:07:34,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1540 transitions. [2021-11-22 15:07:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 15:07:34,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:34,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:34,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:07:34,204 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:34,205 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2021-11-22 15:07:34,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:34,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441558341] [2021-11-22 15:07:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:34,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:34,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:34,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441558341] [2021-11-22 15:07:34,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441558341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:34,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:34,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:07:34,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69051965] [2021-11-22 15:07:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:34,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:07:34,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:07:34,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:07:34,357 INFO L87 Difference]: Start difference. First operand 829 states and 1540 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:34,592 INFO L93 Difference]: Finished difference Result 1197 states and 2116 transitions. [2021-11-22 15:07:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:07:34,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-22 15:07:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:34,602 INFO L225 Difference]: With dead ends: 1197 [2021-11-22 15:07:34,602 INFO L226 Difference]: Without dead ends: 1151 [2021-11-22 15:07:34,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:07:34,610 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:34,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:07:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-22 15:07:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 873. [2021-11-22 15:07:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 871 states have (on average 1.8473019517795637) internal successors, (1609), 872 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1609 transitions. [2021-11-22 15:07:34,649 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1609 transitions. Word has length 52 [2021-11-22 15:07:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:34,649 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1609 transitions. [2021-11-22 15:07:34,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1609 transitions. [2021-11-22 15:07:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 15:07:34,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:34,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:34,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:07:34,658 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2021-11-22 15:07:34,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406145769] [2021-11-22 15:07:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:34,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:34,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406145769] [2021-11-22 15:07:34,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406145769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:34,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:34,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:34,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299888377] [2021-11-22 15:07:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:34,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:34,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:34,801 INFO L87 Difference]: Start difference. First operand 873 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:34,852 INFO L93 Difference]: Finished difference Result 1042 states and 1872 transitions. [2021-11-22 15:07:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:34,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 15:07:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:34,860 INFO L225 Difference]: With dead ends: 1042 [2021-11-22 15:07:34,861 INFO L226 Difference]: Without dead ends: 952 [2021-11-22 15:07:34,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:34,863 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:34,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-11-22 15:07:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 948. [2021-11-22 15:07:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.8213530655391121) internal successors, (1723), 947 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1723 transitions. [2021-11-22 15:07:34,899 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1723 transitions. Word has length 54 [2021-11-22 15:07:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:34,899 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1723 transitions. [2021-11-22 15:07:34,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1723 transitions. [2021-11-22 15:07:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 15:07:34,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:34,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:34,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:07:34,902 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2021-11-22 15:07:34,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:34,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392540139] [2021-11-22 15:07:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:34,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:35,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:35,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392540139] [2021-11-22 15:07:35,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392540139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:35,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:35,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:07:35,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014130618] [2021-11-22 15:07:35,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:35,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:07:35,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:07:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:07:35,118 INFO L87 Difference]: Start difference. First operand 948 states and 1723 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:35,295 INFO L93 Difference]: Finished difference Result 1115 states and 1979 transitions. [2021-11-22 15:07:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:07:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 15:07:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:35,304 INFO L225 Difference]: With dead ends: 1115 [2021-11-22 15:07:35,305 INFO L226 Difference]: Without dead ends: 950 [2021-11-22 15:07:35,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:07:35,307 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 6048 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6048 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:35,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6048 Valid, 1744 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:07:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-22 15:07:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 948. [2021-11-22 15:07:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.8192389006342495) internal successors, (1721), 947 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1721 transitions. [2021-11-22 15:07:35,346 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1721 transitions. Word has length 54 [2021-11-22 15:07:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:35,347 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1721 transitions. [2021-11-22 15:07:35,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1721 transitions. [2021-11-22 15:07:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 15:07:35,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:35,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:35,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:07:35,354 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2021-11-22 15:07:35,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:35,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34030003] [2021-11-22 15:07:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:35,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:35,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34030003] [2021-11-22 15:07:35,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34030003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:35,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:35,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:35,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171814694] [2021-11-22 15:07:35,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:35,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:35,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:35,461 INFO L87 Difference]: Start difference. First operand 948 states and 1721 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:35,504 INFO L93 Difference]: Finished difference Result 1254 states and 2187 transitions. [2021-11-22 15:07:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 15:07:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:35,514 INFO L225 Difference]: With dead ends: 1254 [2021-11-22 15:07:35,514 INFO L226 Difference]: Without dead ends: 1089 [2021-11-22 15:07:35,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:35,518 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:35,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-22 15:07:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2021-11-22 15:07:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1085 states have (on average 1.7778801843317973) internal successors, (1929), 1086 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1929 transitions. [2021-11-22 15:07:35,562 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1929 transitions. Word has length 54 [2021-11-22 15:07:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:35,562 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1929 transitions. [2021-11-22 15:07:35,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1929 transitions. [2021-11-22 15:07:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 15:07:35,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:35,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:35,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:07:35,564 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2021-11-22 15:07:35,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:35,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550194908] [2021-11-22 15:07:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:35,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:35,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:35,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550194908] [2021-11-22 15:07:35,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550194908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:35,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:35,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:35,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890071597] [2021-11-22 15:07:35,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:35,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:35,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:35,638 INFO L87 Difference]: Start difference. First operand 1087 states and 1929 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:35,694 INFO L93 Difference]: Finished difference Result 1647 states and 2771 transitions. [2021-11-22 15:07:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 15:07:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:35,704 INFO L225 Difference]: With dead ends: 1647 [2021-11-22 15:07:35,705 INFO L226 Difference]: Without dead ends: 1343 [2021-11-22 15:07:35,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:35,710 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:35,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-22 15:07:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1341. [2021-11-22 15:07:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1339 states have (on average 1.7184466019417475) internal successors, (2301), 1340 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2301 transitions. [2021-11-22 15:07:35,805 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2301 transitions. Word has length 54 [2021-11-22 15:07:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:35,805 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 2301 transitions. [2021-11-22 15:07:35,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2301 transitions. [2021-11-22 15:07:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 15:07:35,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:35,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:35,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:07:35,807 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:35,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2021-11-22 15:07:35,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:35,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434619168] [2021-11-22 15:07:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:35,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:35,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:35,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434619168] [2021-11-22 15:07:35,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434619168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:35,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:35,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:35,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49885429] [2021-11-22 15:07:35,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:35,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:35,865 INFO L87 Difference]: Start difference. First operand 1341 states and 2301 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:35,927 INFO L93 Difference]: Finished difference Result 2361 states and 3807 transitions. [2021-11-22 15:07:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 15:07:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:35,941 INFO L225 Difference]: With dead ends: 2361 [2021-11-22 15:07:35,941 INFO L226 Difference]: Without dead ends: 1803 [2021-11-22 15:07:35,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:35,944 INFO L933 BasicCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:35,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-11-22 15:07:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1801. [2021-11-22 15:07:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1799 states have (on average 1.6436909394107837) internal successors, (2957), 1800 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2957 transitions. [2021-11-22 15:07:36,033 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2957 transitions. Word has length 54 [2021-11-22 15:07:36,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:36,035 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 2957 transitions. [2021-11-22 15:07:36,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:36,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2957 transitions. [2021-11-22 15:07:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 15:07:36,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:36,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:36,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:07:36,038 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2021-11-22 15:07:36,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:36,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233574211] [2021-11-22 15:07:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:36,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:36,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:36,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233574211] [2021-11-22 15:07:36,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233574211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:36,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:36,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:07:36,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861149232] [2021-11-22 15:07:36,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:36,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:07:36,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:07:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:07:36,162 INFO L87 Difference]: Start difference. First operand 1801 states and 2957 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:36,334 INFO L93 Difference]: Finished difference Result 2571 states and 4058 transitions. [2021-11-22 15:07:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:07:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-22 15:07:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:36,353 INFO L225 Difference]: With dead ends: 2571 [2021-11-22 15:07:36,353 INFO L226 Difference]: Without dead ends: 2569 [2021-11-22 15:07:36,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:07:36,358 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 186 mSDsluCounter, 4622 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6202 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:36,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6202 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-11-22 15:07:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1849. [2021-11-22 15:07:36,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1847 states have (on average 1.6226312939902545) internal successors, (2997), 1848 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2997 transitions. [2021-11-22 15:07:36,468 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2997 transitions. Word has length 55 [2021-11-22 15:07:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:36,469 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2997 transitions. [2021-11-22 15:07:36,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2997 transitions. [2021-11-22 15:07:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 15:07:36,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:36,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:36,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:07:36,472 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2021-11-22 15:07:36,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:36,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883814708] [2021-11-22 15:07:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:36,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:36,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:36,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883814708] [2021-11-22 15:07:36,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883814708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:36,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:36,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:36,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238263214] [2021-11-22 15:07:36,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:36,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:36,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:36,540 INFO L87 Difference]: Start difference. First operand 1849 states and 2997 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:36,661 INFO L93 Difference]: Finished difference Result 2944 states and 4587 transitions. [2021-11-22 15:07:36,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:36,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-22 15:07:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:36,676 INFO L225 Difference]: With dead ends: 2944 [2021-11-22 15:07:36,676 INFO L226 Difference]: Without dead ends: 2333 [2021-11-22 15:07:36,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:36,679 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:36,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-11-22 15:07:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2331. [2021-11-22 15:07:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2329 states have (on average 1.5762129669386002) internal successors, (3671), 2330 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3671 transitions. [2021-11-22 15:07:36,806 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3671 transitions. Word has length 56 [2021-11-22 15:07:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:36,807 INFO L470 AbstractCegarLoop]: Abstraction has 2331 states and 3671 transitions. [2021-11-22 15:07:36,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3671 transitions. [2021-11-22 15:07:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 15:07:36,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:36,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:36,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 15:07:36,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:36,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1392228915, now seen corresponding path program 1 times [2021-11-22 15:07:36,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:36,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950715776] [2021-11-22 15:07:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:36,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:36,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:36,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950715776] [2021-11-22 15:07:36,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950715776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:36,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:36,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:36,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744969939] [2021-11-22 15:07:36,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:36,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:07:36,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:36,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:07:36,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:07:36,999 INFO L87 Difference]: Start difference. First operand 2331 states and 3671 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:44,782 INFO L93 Difference]: Finished difference Result 4586 states and 7980 transitions. [2021-11-22 15:07:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:07:44,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 15:07:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:44,809 INFO L225 Difference]: With dead ends: 4586 [2021-11-22 15:07:44,809 INFO L226 Difference]: Without dead ends: 3833 [2021-11-22 15:07:44,811 INFO L932 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 [2021-11-22 15:07:44,812 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 2373 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2373 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:44,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2373 Valid, 794 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-22 15:07:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-11-22 15:07:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3833. [2021-11-22 15:07:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3831 states have (on average 1.5100495954058992) internal successors, (5785), 3832 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 5785 transitions. [2021-11-22 15:07:44,970 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 5785 transitions. Word has length 67 [2021-11-22 15:07:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:44,970 INFO L470 AbstractCegarLoop]: Abstraction has 3833 states and 5785 transitions. [2021-11-22 15:07:44,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 5785 transitions. [2021-11-22 15:07:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 15:07:44,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:44,979 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:07:44,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 15:07:44,979 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2021-11-22 15:07:44,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:44,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18245749] [2021-11-22 15:07:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:44,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 15:07:45,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:45,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18245749] [2021-11-22 15:07:45,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18245749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:45,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:45,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:07:45,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124219374] [2021-11-22 15:07:45,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:45,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:07:45,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:45,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:07:45,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:07:45,078 INFO L87 Difference]: Start difference. First operand 3833 states and 5785 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:45,638 INFO L93 Difference]: Finished difference Result 10339 states and 15026 transitions. [2021-11-22 15:07:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:07:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-22 15:07:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:45,712 INFO L225 Difference]: With dead ends: 10339 [2021-11-22 15:07:45,712 INFO L226 Difference]: Without dead ends: 8793 [2021-11-22 15:07:45,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:07:45,719 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4794 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4794 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:45,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4794 Valid, 3360 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:07:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8793 states. [2021-11-22 15:07:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8793 to 5377. [2021-11-22 15:07:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5377 states, 5375 states have (on average 1.4811162790697674) internal successors, (7961), 5376 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 7961 transitions. [2021-11-22 15:07:46,133 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 7961 transitions. Word has length 79 [2021-11-22 15:07:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:46,134 INFO L470 AbstractCegarLoop]: Abstraction has 5377 states and 7961 transitions. [2021-11-22 15:07:46,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 7961 transitions. [2021-11-22 15:07:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 15:07:46,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:46,138 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:07:46,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:07:46,139 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:46,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2021-11-22 15:07:46,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:46,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103783081] [2021-11-22 15:07:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:46,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 15:07:46,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103783081] [2021-11-22 15:07:46,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103783081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:46,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:46,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:07:46,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831181057] [2021-11-22 15:07:46,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:46,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:07:46,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:07:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:07:46,237 INFO L87 Difference]: Start difference. First operand 5377 states and 7961 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:46,860 INFO L93 Difference]: Finished difference Result 11883 states and 17202 transitions. [2021-11-22 15:07:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:07:46,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-22 15:07:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:46,889 INFO L225 Difference]: With dead ends: 11883 [2021-11-22 15:07:46,889 INFO L226 Difference]: Without dead ends: 10337 [2021-11-22 15:07:46,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:07:46,897 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 4743 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4743 SdHoareTripleChecker+Valid, 3402 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:46,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4743 Valid, 3402 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:07:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10337 states. [2021-11-22 15:07:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10337 to 7697. [2021-11-22 15:07:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7695 states have (on average 1.456140350877193) internal successors, (11205), 7696 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 11205 transitions. [2021-11-22 15:07:47,499 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 11205 transitions. Word has length 79 [2021-11-22 15:07:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:47,499 INFO L470 AbstractCegarLoop]: Abstraction has 7697 states and 11205 transitions. [2021-11-22 15:07:47,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 11205 transitions. [2021-11-22 15:07:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 15:07:47,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:47,503 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:07:47,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 15:07:47,503 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2021-11-22 15:07:47,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:47,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829551937] [2021-11-22 15:07:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:47,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:07:47,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:47,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829551937] [2021-11-22 15:07:47,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829551937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:47,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:47,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:07:47,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886569615] [2021-11-22 15:07:47,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:47,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:07:47,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:07:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:07:47,586 INFO L87 Difference]: Start difference. First operand 7697 states and 11205 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:48,324 INFO L93 Difference]: Finished difference Result 13427 states and 19378 transitions. [2021-11-22 15:07:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:07:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-22 15:07:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:48,356 INFO L225 Difference]: With dead ends: 13427 [2021-11-22 15:07:48,356 INFO L226 Difference]: Without dead ends: 11881 [2021-11-22 15:07:48,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:07:48,363 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4770 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4770 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:48,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4770 Valid, 3408 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:07:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-11-22 15:07:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 9241. [2021-11-22 15:07:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9239 states have (on average 1.4483169174153048) internal successors, (13381), 9240 states have internal predecessors, (13381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13381 transitions. [2021-11-22 15:07:48,937 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13381 transitions. Word has length 79 [2021-11-22 15:07:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:48,938 INFO L470 AbstractCegarLoop]: Abstraction has 9241 states and 13381 transitions. [2021-11-22 15:07:48,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13381 transitions. [2021-11-22 15:07:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 15:07:48,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:48,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:48,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:07:48,943 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2021-11-22 15:07:48,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:48,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423498847] [2021-11-22 15:07:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:48,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:49,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:49,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423498847] [2021-11-22 15:07:49,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423498847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:49,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:49,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:49,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078151225] [2021-11-22 15:07:49,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:49,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:49,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:49,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:49,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:49,007 INFO L87 Difference]: Start difference. First operand 9241 states and 13381 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:49,333 INFO L93 Difference]: Finished difference Result 14167 states and 20398 transitions. [2021-11-22 15:07:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 15:07:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:49,351 INFO L225 Difference]: With dead ends: 14167 [2021-11-22 15:07:49,352 INFO L226 Difference]: Without dead ends: 7213 [2021-11-22 15:07:49,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:49,365 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:49,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-11-22 15:07:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 7211. [2021-11-22 15:07:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7209 states have (on average 1.4602580108198087) internal successors, (10527), 7210 states have internal predecessors, (10527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 10527 transitions. [2021-11-22 15:07:49,737 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 10527 transitions. Word has length 81 [2021-11-22 15:07:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:49,738 INFO L470 AbstractCegarLoop]: Abstraction has 7211 states and 10527 transitions. [2021-11-22 15:07:49,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 10527 transitions. [2021-11-22 15:07:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 15:07:49,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:49,741 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:07:49,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 15:07:49,742 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:49,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2021-11-22 15:07:49,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:49,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618500110] [2021-11-22 15:07:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:49,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:07:49,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:49,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618500110] [2021-11-22 15:07:49,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618500110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:49,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:49,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:07:49,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801002267] [2021-11-22 15:07:49,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:49,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:07:49,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:07:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:07:49,826 INFO L87 Difference]: Start difference. First operand 7211 states and 10527 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:50,325 INFO L93 Difference]: Finished difference Result 11573 states and 16740 transitions. [2021-11-22 15:07:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:07:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 15:07:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:50,351 INFO L225 Difference]: With dead ends: 11573 [2021-11-22 15:07:50,352 INFO L226 Difference]: Without dead ends: 10483 [2021-11-22 15:07:50,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:07:50,359 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 4758 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4758 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:50,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4758 Valid, 3390 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:07:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2021-11-22 15:07:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8299. [2021-11-22 15:07:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8299 states, 8297 states have (on average 1.4538989996384235) internal successors, (12063), 8298 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8299 states to 8299 states and 12063 transitions. [2021-11-22 15:07:50,910 INFO L78 Accepts]: Start accepts. Automaton has 8299 states and 12063 transitions. Word has length 81 [2021-11-22 15:07:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:50,911 INFO L470 AbstractCegarLoop]: Abstraction has 8299 states and 12063 transitions. [2021-11-22 15:07:50,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 8299 states and 12063 transitions. [2021-11-22 15:07:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 15:07:50,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:50,916 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:07:50,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 15:07:50,916 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:50,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2021-11-22 15:07:50,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:50,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429048710] [2021-11-22 15:07:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:50,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:50,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429048710] [2021-11-22 15:07:50,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429048710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:50,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:50,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:50,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006922678] [2021-11-22 15:07:50,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:50,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:50,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:50,974 INFO L87 Difference]: Start difference. First operand 8299 states and 12063 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:51,219 INFO L93 Difference]: Finished difference Result 11295 states and 16289 transitions. [2021-11-22 15:07:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-22 15:07:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:51,232 INFO L225 Difference]: With dead ends: 11295 [2021-11-22 15:07:51,232 INFO L226 Difference]: Without dead ends: 5309 [2021-11-22 15:07:51,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:51,242 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:51,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2021-11-22 15:07:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 5307. [2021-11-22 15:07:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5307 states, 5305 states have (on average 1.469368520263902) internal successors, (7795), 5306 states have internal predecessors, (7795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5307 states to 5307 states and 7795 transitions. [2021-11-22 15:07:51,526 INFO L78 Accepts]: Start accepts. Automaton has 5307 states and 7795 transitions. Word has length 82 [2021-11-22 15:07:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:51,527 INFO L470 AbstractCegarLoop]: Abstraction has 5307 states and 7795 transitions. [2021-11-22 15:07:51,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5307 states and 7795 transitions. [2021-11-22 15:07:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 15:07:51,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:51,531 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:07:51,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 15:07:51,531 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2021-11-22 15:07:51,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:51,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372105054] [2021-11-22 15:07:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:51,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:51,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:51,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372105054] [2021-11-22 15:07:51,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372105054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:51,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:51,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:51,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112731828] [2021-11-22 15:07:51,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:51,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:51,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:51,596 INFO L87 Difference]: Start difference. First operand 5307 states and 7795 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:51,744 INFO L93 Difference]: Finished difference Result 6807 states and 9887 transitions. [2021-11-22 15:07:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-22 15:07:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:51,750 INFO L225 Difference]: With dead ends: 6807 [2021-11-22 15:07:51,751 INFO L226 Difference]: Without dead ends: 3813 [2021-11-22 15:07:51,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:51,757 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:51,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-11-22 15:07:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3811. [2021-11-22 15:07:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3809 states have (on average 1.4919926489892361) internal successors, (5683), 3810 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 5683 transitions. [2021-11-22 15:07:51,932 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 5683 transitions. Word has length 82 [2021-11-22 15:07:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:51,932 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 5683 transitions. [2021-11-22 15:07:51,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 5683 transitions. [2021-11-22 15:07:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 15:07:51,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:51,936 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:07:51,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 15:07:51,937 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2021-11-22 15:07:51,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:51,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775203371] [2021-11-22 15:07:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:51,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:52,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:52,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775203371] [2021-11-22 15:07:52,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775203371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:07:52,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:07:52,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:07:52,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547070510] [2021-11-22 15:07:52,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:07:52,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:07:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:07:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:52,011 INFO L87 Difference]: Start difference. First operand 3811 states and 5683 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:52,100 INFO L93 Difference]: Finished difference Result 4563 states and 6719 transitions. [2021-11-22 15:07:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:07:52,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-22 15:07:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:52,106 INFO L225 Difference]: With dead ends: 4563 [2021-11-22 15:07:52,106 INFO L226 Difference]: Without dead ends: 3065 [2021-11-22 15:07:52,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:07:52,110 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:52,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:07:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-11-22 15:07:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 3063. [2021-11-22 15:07:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3061 states have (on average 1.5151911140150278) internal successors, (4638), 3062 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4638 transitions. [2021-11-22 15:07:52,298 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4638 transitions. Word has length 82 [2021-11-22 15:07:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:52,298 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4638 transitions. [2021-11-22 15:07:52,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4638 transitions. [2021-11-22 15:07:52,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 15:07:52,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:52,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:52,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 15:07:52,302 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:52,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2021-11-22 15:07:52,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:52,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889560498] [2021-11-22 15:07:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:52,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:52,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:52,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889560498] [2021-11-22 15:07:52,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889560498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:07:52,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773141804] [2021-11-22 15:07:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:52,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:52,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:07:52,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:07:52,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:07:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:52,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:07:52,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:07:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:07:53,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:07:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:07:53,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773141804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:07:53,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:07:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-11-22 15:07:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700427622] [2021-11-22 15:07:53,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:07:53,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 15:07:53,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:53,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 15:07:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-22 15:07:53,857 INFO L87 Difference]: Start difference. First operand 3063 states and 4638 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:58,512 INFO L93 Difference]: Finished difference Result 12222 states and 16849 transitions. [2021-11-22 15:07:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-22 15:07:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-22 15:07:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:58,524 INFO L225 Difference]: With dead ends: 12222 [2021-11-22 15:07:58,524 INFO L226 Difference]: Without dead ends: 11472 [2021-11-22 15:07:58,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-11-22 15:07:58,532 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 19376 mSDsluCounter, 5128 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19376 SdHoareTripleChecker+Valid, 6675 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:58,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19376 Valid, 6675 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 15:07:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-11-22 15:07:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 8732. [2021-11-22 15:07:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8732 states, 8730 states have (on average 1.3626575028636885) internal successors, (11896), 8731 states have internal predecessors, (11896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8732 states to 8732 states and 11896 transitions. [2021-11-22 15:07:59,144 INFO L78 Accepts]: Start accepts. Automaton has 8732 states and 11896 transitions. Word has length 82 [2021-11-22 15:07:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:59,145 INFO L470 AbstractCegarLoop]: Abstraction has 8732 states and 11896 transitions. [2021-11-22 15:07:59,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 8732 states and 11896 transitions. [2021-11-22 15:07:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 15:07:59,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:59,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:07:59,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:07:59,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:59,363 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:07:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2021-11-22 15:07:59,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:59,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990038726] [2021-11-22 15:07:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:59,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:07:59,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:59,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990038726] [2021-11-22 15:07:59,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990038726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:07:59,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106487922] [2021-11-22 15:07:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:59,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:59,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:07:59,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:07:59,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:07:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:59,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 15:07:59,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:08:00,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:08:01,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106487922] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:08:01,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:08:01,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-11-22 15:08:01,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489557831] [2021-11-22 15:08:01,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:08:01,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 15:08:01,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 15:08:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-11-22 15:08:01,784 INFO L87 Difference]: Start difference. First operand 8732 states and 11896 transitions. Second operand has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:08:11,777 INFO L93 Difference]: Finished difference Result 83703 states and 106790 transitions. [2021-11-22 15:08:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-22 15:08:11,777 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-22 15:08:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:08:11,875 INFO L225 Difference]: With dead ends: 83703 [2021-11-22 15:08:11,875 INFO L226 Difference]: Without dead ends: 77373 [2021-11-22 15:08:11,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1490, Invalid=6520, Unknown=0, NotChecked=0, Total=8010 [2021-11-22 15:08:11,897 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 24497 mSDsluCounter, 10118 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24497 SdHoareTripleChecker+Valid, 11680 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:08:11,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24497 Valid, 11680 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 15:08:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77373 states. [2021-11-22 15:08:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77373 to 41082. [2021-11-22 15:08:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41082 states, 41080 states have (on average 1.2803554040895813) internal successors, (52597), 41081 states have internal predecessors, (52597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41082 states to 41082 states and 52597 transitions. [2021-11-22 15:08:15,970 INFO L78 Accepts]: Start accepts. Automaton has 41082 states and 52597 transitions. Word has length 83 [2021-11-22 15:08:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:08:15,970 INFO L470 AbstractCegarLoop]: Abstraction has 41082 states and 52597 transitions. [2021-11-22 15:08:15,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 41082 states and 52597 transitions. [2021-11-22 15:08:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 15:08:15,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:08:15,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:16,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:08:16,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:16,203 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:08:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:16,204 INFO L85 PathProgramCache]: Analyzing trace with hash -966330648, now seen corresponding path program 1 times [2021-11-22 15:08:16,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:16,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952767918] [2021-11-22 15:08:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:16,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 15:08:16,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952767918] [2021-11-22 15:08:16,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952767918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:08:16,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:08:16,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:08:16,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188096822] [2021-11-22 15:08:16,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:08:16,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:08:16,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:16,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:08:16,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:08:16,402 INFO L87 Difference]: Start difference. First operand 41082 states and 52597 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:08:19,846 INFO L93 Difference]: Finished difference Result 74025 states and 94726 transitions. [2021-11-22 15:08:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:08:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-22 15:08:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:08:19,889 INFO L225 Difference]: With dead ends: 74025 [2021-11-22 15:08:19,889 INFO L226 Difference]: Without dead ends: 35319 [2021-11-22 15:08:19,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:08:19,917 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4552 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4552 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:08:19,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4552 Valid, 2995 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:08:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35319 states. [2021-11-22 15:08:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35319 to 35319. [2021-11-22 15:08:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35319 states, 35317 states have (on average 1.2758161791771667) internal successors, (45058), 35318 states have internal predecessors, (45058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35319 states to 35319 states and 45058 transitions. [2021-11-22 15:08:23,021 INFO L78 Accepts]: Start accepts. Automaton has 35319 states and 45058 transitions. Word has length 83 [2021-11-22 15:08:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:08:23,021 INFO L470 AbstractCegarLoop]: Abstraction has 35319 states and 45058 transitions. [2021-11-22 15:08:23,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 35319 states and 45058 transitions. [2021-11-22 15:08:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 15:08:23,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:08:23,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:23,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-22 15:08:23,025 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:08:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1521824328, now seen corresponding path program 1 times [2021-11-22 15:08:23,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:23,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001620131] [2021-11-22 15:08:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:23,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:08:23,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001620131] [2021-11-22 15:08:23,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001620131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:08:23,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:08:23,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:08:23,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895694846] [2021-11-22 15:08:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:08:23,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:08:23,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:23,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:08:23,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:08:23,096 INFO L87 Difference]: Start difference. First operand 35319 states and 45058 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:08:25,438 INFO L93 Difference]: Finished difference Result 52532 states and 66588 transitions. [2021-11-22 15:08:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:08:25,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-22 15:08:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:08:25,465 INFO L225 Difference]: With dead ends: 52532 [2021-11-22 15:08:25,465 INFO L226 Difference]: Without dead ends: 19714 [2021-11-22 15:08:25,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:08:25,485 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4612 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4612 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:08:25,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4612 Valid, 2978 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:08:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19714 states. [2021-11-22 15:08:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19714 to 19714. [2021-11-22 15:08:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19714 states, 19712 states have (on average 1.2695819805194806) internal successors, (25026), 19713 states have internal predecessors, (25026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19714 states to 19714 states and 25026 transitions. [2021-11-22 15:08:27,330 INFO L78 Accepts]: Start accepts. Automaton has 19714 states and 25026 transitions. Word has length 83 [2021-11-22 15:08:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:08:27,330 INFO L470 AbstractCegarLoop]: Abstraction has 19714 states and 25026 transitions. [2021-11-22 15:08:27,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 19714 states and 25026 transitions. [2021-11-22 15:08:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 15:08:27,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:08:27,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:27,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-22 15:08:27,332 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:08:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:27,333 INFO L85 PathProgramCache]: Analyzing trace with hash -460055256, now seen corresponding path program 1 times [2021-11-22 15:08:27,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:27,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562867971] [2021-11-22 15:08:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:27,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:08:27,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562867971] [2021-11-22 15:08:27,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562867971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:08:27,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:08:27,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:08:27,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915910871] [2021-11-22 15:08:27,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:08:27,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:08:27,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:27,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:08:27,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:08:27,394 INFO L87 Difference]: Start difference. First operand 19714 states and 25026 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:08:28,812 INFO L93 Difference]: Finished difference Result 33252 states and 41779 transitions. [2021-11-22 15:08:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:08:28,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-22 15:08:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:08:28,836 INFO L225 Difference]: With dead ends: 33252 [2021-11-22 15:08:28,837 INFO L226 Difference]: Without dead ends: 15891 [2021-11-22 15:08:28,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:08:28,851 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4617 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4617 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:08:28,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4617 Valid, 2976 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:08:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15891 states. [2021-11-22 15:08:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15891 to 15891. [2021-11-22 15:08:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15891 states, 15889 states have (on average 1.2699351752784946) internal successors, (20178), 15890 states have internal predecessors, (20178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15891 states to 15891 states and 20178 transitions. [2021-11-22 15:08:30,420 INFO L78 Accepts]: Start accepts. Automaton has 15891 states and 20178 transitions. Word has length 83 [2021-11-22 15:08:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:08:30,420 INFO L470 AbstractCegarLoop]: Abstraction has 15891 states and 20178 transitions. [2021-11-22 15:08:30,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 15891 states and 20178 transitions. [2021-11-22 15:08:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 15:08:30,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:08:30,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:30,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-22 15:08:30,422 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:08:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1663669571, now seen corresponding path program 1 times [2021-11-22 15:08:30,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:30,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570905765] [2021-11-22 15:08:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:30,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:08:30,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570905765] [2021-11-22 15:08:30,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570905765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285151502] [2021-11-22 15:08:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:30,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:30,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:08:30,693 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:08:30,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:08:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:30,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-22 15:08:30,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:08:54,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:08:58,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285151502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:08:58,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:08:58,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 20] total 46 [2021-11-22 15:08:58,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107576276] [2021-11-22 15:08:58,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:08:58,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-22 15:08:58,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:58,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-22 15:08:58,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1798, Unknown=2, NotChecked=0, Total=2070 [2021-11-22 15:08:58,769 INFO L87 Difference]: Start difference. First operand 15891 states and 20178 transitions. Second operand has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:09:30,936 WARN L227 SmtUtils]: Spent 20.65s on a formula simplification. DAG size of input: 101 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:09:43,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:09:43,778 INFO L93 Difference]: Finished difference Result 36183 states and 44176 transitions. [2021-11-22 15:09:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 15:09:43,778 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-22 15:09:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:09:43,802 INFO L225 Difference]: With dead ends: 36183 [2021-11-22 15:09:43,802 INFO L226 Difference]: Without dead ends: 24064 [2021-11-22 15:09:43,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=878, Invalid=3404, Unknown=8, NotChecked=0, Total=4290 [2021-11-22 15:09:43,812 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 22432 mSDsluCounter, 14789 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22432 SdHoareTripleChecker+Valid, 16338 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:09:43,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22432 Valid, 16338 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 959 Invalid, 0 Unknown, 87 Unchecked, 2.0s Time] [2021-11-22 15:09:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24064 states. [2021-11-22 15:09:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24064 to 15976. [2021-11-22 15:09:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15976 states, 15974 states have (on average 1.269250031300864) internal successors, (20275), 15975 states have internal predecessors, (20275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:09:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15976 states to 15976 states and 20275 transitions. [2021-11-22 15:09:45,506 INFO L78 Accepts]: Start accepts. Automaton has 15976 states and 20275 transitions. Word has length 84 [2021-11-22 15:09:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:09:45,506 INFO L470 AbstractCegarLoop]: Abstraction has 15976 states and 20275 transitions. [2021-11-22 15:09:45,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:09:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 15976 states and 20275 transitions. [2021-11-22 15:09:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 15:09:45,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:09:45,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:09:45,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:09:45,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-22 15:09:45,735 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:09:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:09:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1055776552, now seen corresponding path program 1 times [2021-11-22 15:09:45,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:09:45,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589787438] [2021-11-22 15:09:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:09:45,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:09:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:09:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 15:09:45,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:09:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589787438] [2021-11-22 15:09:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589787438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:09:45,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:09:45,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:09:45,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314844228] [2021-11-22 15:09:45,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:09:45,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:09:45,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:09:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:09:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:09:45,886 INFO L87 Difference]: Start difference. First operand 15976 states and 20275 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:09:49,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:09:49,318 INFO L93 Difference]: Finished difference Result 46595 states and 58173 transitions. [2021-11-22 15:09:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:09:49,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-22 15:09:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:09:49,356 INFO L225 Difference]: With dead ends: 46595 [2021-11-22 15:09:49,356 INFO L226 Difference]: Without dead ends: 32944 [2021-11-22 15:09:49,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:09:49,365 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4730 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4730 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:09:49,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4730 Valid, 3072 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:09:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32944 states. [2021-11-22 15:09:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32944 to 29018. [2021-11-22 15:09:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29018 states, 29016 states have (on average 1.2400744416873448) internal successors, (35982), 29017 states have internal predecessors, (35982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:09:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29018 states to 29018 states and 35982 transitions. [2021-11-22 15:09:52,314 INFO L78 Accepts]: Start accepts. Automaton has 29018 states and 35982 transitions. Word has length 84 [2021-11-22 15:09:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:09:52,315 INFO L470 AbstractCegarLoop]: Abstraction has 29018 states and 35982 transitions. [2021-11-22 15:09:52,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:09:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 29018 states and 35982 transitions. [2021-11-22 15:09:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 15:09:52,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:09:52,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:09:52,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-22 15:09:52,317 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:09:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:09:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash -260780419, now seen corresponding path program 1 times [2021-11-22 15:09:52,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:09:52,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884615749] [2021-11-22 15:09:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:09:52,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:09:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:09:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:09:54,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:09:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884615749] [2021-11-22 15:09:54,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884615749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:09:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914775759] [2021-11-22 15:09:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:09:54,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:54,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:09:54,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:09:54,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:09:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:09:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-22 15:09:54,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:10:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:10:00,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:10:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:10:06,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914775759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:10:06,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:10:06,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 17] total 53 [2021-11-22 15:10:06,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394686804] [2021-11-22 15:10:06,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:10:06,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-22 15:10:06,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:10:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-22 15:10:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2499, Unknown=0, NotChecked=0, Total=2756 [2021-11-22 15:10:06,134 INFO L87 Difference]: Start difference. First operand 29018 states and 35982 transitions. Second operand has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:50,647 INFO L93 Difference]: Finished difference Result 153353 states and 182720 transitions. [2021-11-22 15:12:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 414 states. [2021-11-22 15:12:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-22 15:12:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:50,859 INFO L225 Difference]: With dead ends: 153353 [2021-11-22 15:12:50,859 INFO L226 Difference]: Without dead ends: 139214 [2021-11-22 15:12:50,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91251 ImplicationChecksByTransitivity, 138.5s TimeCoverageRelationStatistics Valid=21451, Invalid=184211, Unknown=0, NotChecked=0, Total=205662 [2021-11-22 15:12:50,918 INFO L933 BasicCegarLoop]: 1839 mSDtfsCounter, 19690 mSDsluCounter, 47259 mSDsCounter, 0 mSdLazyCounter, 5671 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19690 SdHoareTripleChecker+Valid, 49098 SdHoareTripleChecker+Invalid, 6285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 5671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:50,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19690 Valid, 49098 Invalid, 6285 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [614 Valid, 5671 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2021-11-22 15:12:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139214 states. [2021-11-22 15:12:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139214 to 38178. [2021-11-22 15:12:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38178 states, 38176 states have (on average 1.2372956831517183) internal successors, (47235), 38177 states have internal predecessors, (47235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38178 states to 38178 states and 47235 transitions. [2021-11-22 15:12:56,774 INFO L78 Accepts]: Start accepts. Automaton has 38178 states and 47235 transitions. Word has length 85 [2021-11-22 15:12:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:56,775 INFO L470 AbstractCegarLoop]: Abstraction has 38178 states and 47235 transitions. [2021-11-22 15:12:56,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 38178 states and 47235 transitions. [2021-11-22 15:12:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 15:12:56,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:56,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:12:56,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:12:56,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-22 15:12:56,979 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:12:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1764570563, now seen corresponding path program 1 times [2021-11-22 15:12:56,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:56,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521804866] [2021-11-22 15:12:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:56,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:12:57,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521804866] [2021-11-22 15:12:57,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521804866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:12:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807830550] [2021-11-22 15:12:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:57,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:12:57,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:12:57,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:12:57,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:12:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:57,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 15:12:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:13:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:13:00,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:13:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:13:02,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807830550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:13:02,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:13:02,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-11-22 15:13:02,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001283070] [2021-11-22 15:13:02,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:13:02,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 15:13:02,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:13:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 15:13:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-11-22 15:13:02,902 INFO L87 Difference]: Start difference. First operand 38178 states and 47235 transitions. Second operand has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 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) [2021-11-22 15:13:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:13:25,755 INFO L93 Difference]: Finished difference Result 133129 states and 165250 transitions. [2021-11-22 15:13:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 15:13:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 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 85 [2021-11-22 15:13:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:13:25,900 INFO L225 Difference]: With dead ends: 133129 [2021-11-22 15:13:25,900 INFO L226 Difference]: Without dead ends: 118970 [2021-11-22 15:13:25,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=774, Invalid=2886, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 15:13:25,918 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 12168 mSDsluCounter, 22716 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12168 SdHoareTripleChecker+Valid, 24382 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:13:25,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12168 Valid, 24382 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 15:13:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118970 states. [2021-11-22 15:13:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118970 to 42407. [2021-11-22 15:13:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42407 states, 42405 states have (on average 1.2357976653696499) internal successors, (52404), 42406 states have internal predecessors, (52404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42407 states to 42407 states and 52404 transitions. [2021-11-22 15:13:32,465 INFO L78 Accepts]: Start accepts. Automaton has 42407 states and 52404 transitions. Word has length 85 [2021-11-22 15:13:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:13:32,465 INFO L470 AbstractCegarLoop]: Abstraction has 42407 states and 52404 transitions. [2021-11-22 15:13:32,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 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) [2021-11-22 15:13:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 42407 states and 52404 transitions. [2021-11-22 15:13:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-22 15:13:32,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:13:32,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:13:32,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:13:32,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:13:32,683 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:13:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:13:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1270984347, now seen corresponding path program 1 times [2021-11-22 15:13:32,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:13:32,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841754626] [2021-11-22 15:13:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:13:32,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:13:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:13:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:13:33,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:13:33,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841754626] [2021-11-22 15:13:33,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841754626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:13:33,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989031306] [2021-11-22 15:13:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:13:33,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:13:33,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:13:33,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:13:33,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a10ee0ee-06a6-4bee-b126-bcd97555d85a/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:13:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:13:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 15:13:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:13:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:13:36,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:13:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:13:39,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989031306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:13:39,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:13:39,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 37 [2021-11-22 15:13:39,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867389907] [2021-11-22 15:13:39,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:13:39,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 15:13:39,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:13:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 15:13:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 15:13:39,393 INFO L87 Difference]: Start difference. First operand 42407 states and 52404 transitions. Second operand has 37 states, 37 states have (on average 6.378378378378378) internal successors, (236), 37 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:13:59,443 INFO L93 Difference]: Finished difference Result 105015 states and 126713 transitions. [2021-11-22 15:13:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 15:13:59,444 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.378378378378378) internal successors, (236), 37 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-22 15:13:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:13:59,548 INFO L225 Difference]: With dead ends: 105015 [2021-11-22 15:13:59,548 INFO L226 Difference]: Without dead ends: 84535 [2021-11-22 15:13:59,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=877, Invalid=4093, Unknown=0, NotChecked=0, Total=4970 [2021-11-22 15:13:59,567 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 15218 mSDsluCounter, 17765 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15218 SdHoareTripleChecker+Valid, 19419 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:13:59,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15218 Valid, 19419 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 15:13:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84535 states.