./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd5.i --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_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/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_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/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_b093468e-57bc-45ab-a9dd-153968dc6a41/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 d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:40:35,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:40:35,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:40:35,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:40:35,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:40:35,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:40:35,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:40:35,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:40:35,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:40:35,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:40:35,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:40:35,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:40:35,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:40:35,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:40:35,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:40:35,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:40:35,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:40:35,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:40:35,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:40:35,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:40:35,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:40:35,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:40:35,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:40:35,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:40:35,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:40:35,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:40:35,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:40:35,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:40:35,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:40:35,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:40:35,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:40:35,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:40:35,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:40:35,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:40:35,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:40:35,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:40:35,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:40:35,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:40:35,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:40:35,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:40:35,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:40:35,865 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:40:35,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:40:35,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:40:35,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:40:35,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:40:35,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:40:35,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:40:35,931 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:40:35,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:40:35,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:40:35,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:40:35,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:40:35,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:40:35,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:40:35,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:40:35,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:40:35,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:40:35,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:40:35,935 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:40:35,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:40:35,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:40:35,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:40:35,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:40:35,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:40:35,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:40:35,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:40:35,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:40:35,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:40:35,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:40:35,938 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:40:35,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:40:35,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:40:35,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:40:35,939 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_b093468e-57bc-45ab-a9dd-153968dc6a41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2021-11-22 15:40:36,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:40:36,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:40:36,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:40:36,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:40:36,355 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:40:36,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-11-22 15:40:36,479 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/data/3d453e7cb/37ae03eadd0d4538a16df12af99bd812/FLAGfcf476e1b [2021-11-22 15:40:37,086 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:40:37,087 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/sv-benchmarks/c/array-crafted/bAnd5.i [2021-11-22 15:40:37,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/data/3d453e7cb/37ae03eadd0d4538a16df12af99bd812/FLAGfcf476e1b [2021-11-22 15:40:37,422 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/data/3d453e7cb/37ae03eadd0d4538a16df12af99bd812 [2021-11-22 15:40:37,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:40:37,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:40:37,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:40:37,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:40:37,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:40:37,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c1eedc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37, skipping insertion in model container [2021-11-22 15:40:37,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:40:37,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:40:37,765 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_b093468e-57bc-45ab-a9dd-153968dc6a41/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-11-22 15:40:37,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:40:37,779 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:40:37,807 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_b093468e-57bc-45ab-a9dd-153968dc6a41/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-11-22 15:40:37,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:40:37,826 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:40:37,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37 WrapperNode [2021-11-22 15:40:37,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:40:37,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:40:37,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:40:37,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:40:37,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,888 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 127 [2021-11-22 15:40:37,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:40:37,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:40:37,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:40:37,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:40:37,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:40:37,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:40:37,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:40:37,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:40:37,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (1/1) ... [2021-11-22 15:40:37,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:40:38,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:40:38,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:40:38,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:40:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:40:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:40:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:40:38,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:40:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:40:38,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:40:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:40:38,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:40:38,198 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:40:38,200 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:40:38,451 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:40:38,459 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:40:38,459 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-22 15:40:38,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:40:38 BoogieIcfgContainer [2021-11-22 15:40:38,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:40:38,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:40:38,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:40:38,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:40:38,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:40:37" (1/3) ... [2021-11-22 15:40:38,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeb79de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:40:38, skipping insertion in model container [2021-11-22 15:40:38,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:37" (2/3) ... [2021-11-22 15:40:38,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeb79de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:40:38, skipping insertion in model container [2021-11-22 15:40:38,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:40:38" (3/3) ... [2021-11-22 15:40:38,474 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-11-22 15:40:38,481 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:40:38,481 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:40:38,588 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:40:38,598 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 15:40:38,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:40:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 15:40:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 15:40:38,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:38,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:40:38,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-11-22 15:40:38,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:40:38,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864749090] [2021-11-22 15:40:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:38,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:40:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:38,833 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 15:40:38,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:40:38,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864749090] [2021-11-22 15:40:38,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864749090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:40:38,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:40:38,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:40:38,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214943187] [2021-11-22 15:40:38,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:40:38,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:40:38,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:40:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:40:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:40:38,890 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 15:40:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:38,914 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-11-22 15:40:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:40:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-22 15:40:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:38,925 INFO L225 Difference]: With dead ends: 53 [2021-11-22 15:40:38,926 INFO L226 Difference]: Without dead ends: 24 [2021-11-22 15:40:38,930 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 15:40:38,936 INFO L933 BasicCegarLoop]: 34 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, 34 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 15:40:38,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:40:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-22 15:40:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-22 15:40:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 15:40:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-22 15:40:38,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-11-22 15:40:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:38,985 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-22 15:40:38,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 15:40:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-22 15:40:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 15:40:38,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:38,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:40:38,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:40:38,988 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:38,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-11-22 15:40:38,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:40:38,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509844443] [2021-11-22 15:40:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:38,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:40:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:39,087 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 15:40:39,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:40:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509844443] [2021-11-22 15:40:39,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509844443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:40:39,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:40:39,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:40:39,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047277457] [2021-11-22 15:40:39,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:40:39,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:40:39,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:40:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:40:39,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:40:39,094 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 15:40:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:39,144 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-22 15:40:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:40:39,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-22 15:40:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:39,146 INFO L225 Difference]: With dead ends: 45 [2021-11-22 15:40:39,146 INFO L226 Difference]: Without dead ends: 26 [2021-11-22 15:40:39,147 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 15:40:39,150 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:40:39,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:40:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-22 15:40:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-22 15:40:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states 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 15:40:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-22 15:40:39,160 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-11-22 15:40:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:39,161 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-22 15:40:39,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 15:40:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-22 15:40:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 15:40:39,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:39,163 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] [2021-11-22 15:40:39,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:40:39,164 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:39,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2143387046, now seen corresponding path program 1 times [2021-11-22 15:40:39,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:40:39,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568375756] [2021-11-22 15:40:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:39,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:40:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:40:39,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:40:39,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568375756] [2021-11-22 15:40:39,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568375756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:40:39,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:40:39,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:40:39,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503413951] [2021-11-22 15:40:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:40:39,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:40:39,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:40:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:40:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:40:39,283 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 15:40:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:39,427 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-11-22 15:40:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:40:39,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 15:40:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:39,429 INFO L225 Difference]: With dead ends: 47 [2021-11-22 15:40:39,430 INFO L226 Difference]: Without dead ends: 31 [2021-11-22 15:40:39,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:40:39,433 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:40:39,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 23 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:40:39,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-22 15:40:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-22 15:40:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 15:40:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-22 15:40:39,443 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2021-11-22 15:40:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:39,444 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-22 15:40:39,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 15:40:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-22 15:40:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 15:40:39,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:39,447 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] [2021-11-22 15:40:39,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:40:39,448 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash 46775620, now seen corresponding path program 1 times [2021-11-22 15:40:39,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:40:39,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373533909] [2021-11-22 15:40:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:39,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:40:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:40:39,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:40:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373533909] [2021-11-22 15:40:39,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373533909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:40:39,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:40:39,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:40:39,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863989990] [2021-11-22 15:40:39,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:40:39,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:40:39,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:40:39,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:40:39,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:40:39,617 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 15:40:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:39,666 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-22 15:40:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:40:39,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-22 15:40:39,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:39,668 INFO L225 Difference]: With dead ends: 39 [2021-11-22 15:40:39,669 INFO L226 Difference]: Without dead ends: 30 [2021-11-22 15:40:39,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:40:39,672 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:40:39,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:40:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-22 15:40:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-22 15:40:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 15:40:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-22 15:40:39,682 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2021-11-22 15:40:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:39,684 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-22 15:40:39,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 15:40:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-22 15:40:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 15:40:39,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:39,686 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] [2021-11-22 15:40:39,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:40:39,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash -548779230, now seen corresponding path program 1 times [2021-11-22 15:40:39,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:40:39,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638420251] [2021-11-22 15:40:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:39,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:40:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:40:39,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:40:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638420251] [2021-11-22 15:40:39,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638420251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:40:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550923704] [2021-11-22 15:40:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:39,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:40:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:40:39,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:40:39,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:40:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:40:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:40:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:40:40,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:40:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:40:40,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550923704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:40:40,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:40:40,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:40:40,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345931801] [2021-11-22 15:40:40,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:40:40,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:40:40,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:40:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:40:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:40:40,466 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 15:40:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:40,556 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-11-22 15:40:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:40:40,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-22 15:40:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:40,558 INFO L225 Difference]: With dead ends: 55 [2021-11-22 15:40:40,558 INFO L226 Difference]: Without dead ends: 32 [2021-11-22 15:40:40,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:40:40,561 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:40:40,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:40:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-22 15:40:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-22 15:40:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 15:40:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-22 15:40:40,570 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-11-22 15:40:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:40,570 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-22 15:40:40,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 15:40:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-22 15:40:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 15:40:40,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:40,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:40:40,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:40:40,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:40:40,773 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 2 times [2021-11-22 15:40:40,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:40:40,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147554782] [2021-11-22 15:40:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:40,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:40:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 15:40:40,859 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 15:40:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 15:40:40,961 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 15:40:40,961 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 15:40:40,962 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 15:40:40,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:40:40,969 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-11-22 15:40:40,974 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 15:40:41,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 03:40:41 BoogieIcfgContainer [2021-11-22 15:40:41,075 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 15:40:41,076 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 15:40:41,076 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 15:40:41,077 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 15:40:41,077 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:40:38" (3/4) ... [2021-11-22 15:40:41,086 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-22 15:40:41,086 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 15:40:41,087 INFO L158 Benchmark]: Toolchain (without parser) took 3660.19ms. Allocated memory is still 136.3MB. Free memory was 97.4MB in the beginning and 79.7MB in the end (delta: 17.7MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. [2021-11-22 15:40:41,088 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 136.3MB. Free memory was 114.6MB in the beginning and 114.5MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:40:41,088 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.44ms. Allocated memory is still 136.3MB. Free memory was 97.2MB in the beginning and 109.9MB in the end (delta: -12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 15:40:41,089 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.52ms. Allocated memory is still 136.3MB. Free memory was 109.9MB in the beginning and 108.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:40:41,090 INFO L158 Benchmark]: Boogie Preprocessor took 77.33ms. Allocated memory is still 136.3MB. Free memory was 108.4MB in the beginning and 106.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 15:40:41,090 INFO L158 Benchmark]: RCFGBuilder took 494.49ms. Allocated memory is still 136.3MB. Free memory was 106.6MB in the beginning and 94.6MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-22 15:40:41,091 INFO L158 Benchmark]: TraceAbstraction took 2611.20ms. Allocated memory is still 136.3MB. Free memory was 94.6MB in the beginning and 79.7MB in the end (delta: 14.9MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2021-11-22 15:40:41,091 INFO L158 Benchmark]: Witness Printer took 9.85ms. Allocated memory is still 136.3MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:40:41,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 136.3MB. Free memory was 114.6MB in the beginning and 114.5MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.44ms. Allocated memory is still 136.3MB. Free memory was 97.2MB in the beginning and 109.9MB in the end (delta: -12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.52ms. Allocated memory is still 136.3MB. Free memory was 109.9MB in the beginning and 108.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 77.33ms. Allocated memory is still 136.3MB. Free memory was 108.4MB in the beginning and 106.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 494.49ms. Allocated memory is still 136.3MB. Free memory was 106.6MB in the beginning and 94.6MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2611.20ms. Allocated memory is still 136.3MB. Free memory was 94.6MB in the beginning and 79.7MB in the end (delta: 14.9MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. * Witness Printer took 9.85ms. Allocated memory is still 136.3MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [i=0, N=2, x={3:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=1, N=2, x={3:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=2, N=2, x={3:0}] [L40] COND FALSE !(i < N) VAL [i=2, N=2, x={3:0}] [L45] CALL, EXPR bAnd(x) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-2, x={3:0}, x={3:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ VAL [i=2, N=2, x={3:0}, x={3:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, x={3:0}, x={3:0}] [L27] return res; VAL [\result=-4, i=2, N=2, res=4294967292, x={3:0}, x={3:0}] [L45] RET, EXPR bAnd(x) [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L48] CALL, EXPR bAnd(x) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-3, x={3:0}, x={3:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ VAL [i=2, N=2, x={3:0}, x={3:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, x={3:0}, x={3:0}] [L27] return res; VAL [\result=-5, i=2, N=2, res=4294967291, x={3:0}, x={3:0}] [L48] RET, EXPR bAnd(x) [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [i=2, i=0, N=2, ret=-4, ret2=-5, temp=-3, x={3:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/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 -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2021-11-22 15:40:45,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:40:45,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:40:45,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:40:45,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:40:45,090 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:40:45,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-11-22 15:40:45,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/data/a7d02b4a6/d7e4478b1d584245ba3d5f8a33ce79fb/FLAG38a26e7a1 [2021-11-22 15:40:45,937 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:40:45,943 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/sv-benchmarks/c/array-crafted/bAnd5.i [2021-11-22 15:40:45,954 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/data/a7d02b4a6/d7e4478b1d584245ba3d5f8a33ce79fb/FLAG38a26e7a1 [2021-11-22 15:40:46,253 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/data/a7d02b4a6/d7e4478b1d584245ba3d5f8a33ce79fb [2021-11-22 15:40:46,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:40:46,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:40:46,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:40:46,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:40:46,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:40:46,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7421b6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46, skipping insertion in model container [2021-11-22 15:40:46,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:40:46,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:40:46,530 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_b093468e-57bc-45ab-a9dd-153968dc6a41/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-11-22 15:40:46,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:40:46,549 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:40:46,638 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_b093468e-57bc-45ab-a9dd-153968dc6a41/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-11-22 15:40:46,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:40:46,660 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:40:46,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46 WrapperNode [2021-11-22 15:40:46,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:40:46,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:40:46,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:40:46,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:40:46,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,720 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2021-11-22 15:40:46,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:40:46,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:40:46,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:40:46,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:40:46,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:40:46,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:40:46,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:40:46,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:40:46,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (1/1) ... [2021-11-22 15:40:46,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:40:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:40:46,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:40:46,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:40:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:40:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 15:40:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:40:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-22 15:40:46,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:40:46,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:40:46,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:40:46,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-22 15:40:47,042 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:40:47,044 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:40:47,399 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:40:47,409 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:40:47,409 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-22 15:40:47,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:40:47 BoogieIcfgContainer [2021-11-22 15:40:47,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:40:47,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:40:47,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:40:47,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:40:47,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:40:46" (1/3) ... [2021-11-22 15:40:47,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7a5e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:40:47, skipping insertion in model container [2021-11-22 15:40:47,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:40:46" (2/3) ... [2021-11-22 15:40:47,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7a5e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:40:47, skipping insertion in model container [2021-11-22 15:40:47,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:40:47" (3/3) ... [2021-11-22 15:40:47,448 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-11-22 15:40:47,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:40:47,457 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:40:47,528 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:40:47,538 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 15:40:47,539 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:40:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 15:40:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 15:40:47,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:47,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:40:47,573 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-11-22 15:40:47,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:40:47,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742621516] [2021-11-22 15:40:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:47,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:40:47,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:40:47,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:40:47,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 15:40:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-22 15:40:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:40:47,922 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 15:40:47,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:40:48,005 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 15:40:48,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:40:48,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742621516] [2021-11-22 15:40:48,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742621516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:40:48,008 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:40:48,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 15:40:48,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240589037] [2021-11-22 15:40:48,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:40:48,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:40:48,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:40:48,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:40:48,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:40:48,074 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 15:40:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:48,102 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-11-22 15:40:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:40:48,105 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-22 15:40:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:48,115 INFO L225 Difference]: With dead ends: 53 [2021-11-22 15:40:48,116 INFO L226 Difference]: Without dead ends: 24 [2021-11-22 15:40:48,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 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 15:40:48,127 INFO L933 BasicCegarLoop]: 34 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, 34 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 15:40:48,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:40:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-22 15:40:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-22 15:40:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 15:40:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-22 15:40:48,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-11-22 15:40:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:48,193 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-22 15:40:48,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 15:40:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-22 15:40:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 15:40:48,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:48,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:40:48,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:40:48,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:40:48,413 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-11-22 15:40:48,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:40:48,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244807102] [2021-11-22 15:40:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:48,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:40:48,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:40:48,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:40:48,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 15:40:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:48,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:40:48,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:40:48,714 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 15:40:48,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:40:48,800 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 15:40:48,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:40:48,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244807102] [2021-11-22 15:40:48,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244807102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:40:48,803 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:40:48,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 15:40:48,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291243864] [2021-11-22 15:40:48,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:40:48,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:40:48,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:40:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:40:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:40:48,815 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 15:40:48,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:48,923 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-22 15:40:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:40:48,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-22 15:40:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:48,930 INFO L225 Difference]: With dead ends: 46 [2021-11-22 15:40:48,930 INFO L226 Difference]: Without dead ends: 27 [2021-11-22 15:40:48,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:40:48,933 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:40:48,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:40:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-22 15:40:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-22 15:40:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 15:40:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-22 15:40:48,951 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2021-11-22 15:40:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:48,952 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-22 15:40:48,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 15:40:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-22 15:40:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 15:40:48,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:48,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:40:48,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-22 15:40:49,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:40:49,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash -524663612, now seen corresponding path program 1 times [2021-11-22 15:40:49,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:40:49,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879934327] [2021-11-22 15:40:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:49,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:40:49,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:40:49,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:40:49,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 15:40:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:49,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:40:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:40:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:40:49,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:40:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:40:49,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:40:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879934327] [2021-11-22 15:40:49,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879934327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:40:49,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:40:49,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-22 15:40:49,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924803375] [2021-11-22 15:40:49,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:40:49,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:40:49,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:40:49,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:40:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:40:49,837 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 15:40:50,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:50,328 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-11-22 15:40:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:40:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 22 [2021-11-22 15:40:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:50,332 INFO L225 Difference]: With dead ends: 74 [2021-11-22 15:40:50,332 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 15:40:50,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:40:50,335 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 180 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:40:50,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 69 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 15:40:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 15:40:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2021-11-22 15:40:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 15:40:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-22 15:40:50,350 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-11-22 15:40:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:50,350 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-22 15:40:50,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 15:40:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-22 15:40:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 15:40:50,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:50,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:40:50,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:40:50,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:40:50,577 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash -187943454, now seen corresponding path program 1 times [2021-11-22 15:40:50,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:40:50,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181582501] [2021-11-22 15:40:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:50,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:40:50,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:40:50,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:40:50,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 15:40:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:50,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:40:50,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:40:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 15:40:50,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:40:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 15:40:51,433 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:40:51,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181582501] [2021-11-22 15:40:51,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181582501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:40:51,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:40:51,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-22 15:40:51,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004806854] [2021-11-22 15:40:51,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:40:51,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:40:51,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:40:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:40:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:40:51,438 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 15:40:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:40:51,862 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-11-22 15:40:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:40:51,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-22 15:40:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:40:51,866 INFO L225 Difference]: With dead ends: 67 [2021-11-22 15:40:51,867 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 15:40:51,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:40:51,869 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 139 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:40:51,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 74 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:40:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 15:40:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 31. [2021-11-22 15:40:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 15:40:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-22 15:40:51,889 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-11-22 15:40:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:40:51,889 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-22 15:40:51,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 15:40:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-22 15:40:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 15:40:51,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:40:51,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:40:51,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:40:52,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:40:52,108 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:40:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:40:52,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 1 times [2021-11-22 15:40:52,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:40:52,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399372339] [2021-11-22 15:40:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:40:52,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:40:52,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:40:52,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:40:52,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 15:40:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:40:52,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-22 15:40:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:40:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:40:52,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-11-22 15:40:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:40:53,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:40:53,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-11-22 15:40:53,825 INFO L354 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2021-11-22 15:40:53,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 45 [2021-11-22 15:40:54,009 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-22 15:40:54,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-11-22 15:40:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:40:54,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:41:05,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-22 15:41:05,857 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 15:41:05,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-11-22 15:41:05,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-11-22 15:41:05,882 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 15:41:05,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 156 [2021-11-22 15:41:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:41:07,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:41:07,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399372339] [2021-11-22 15:41:07,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399372339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:41:07,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:41:07,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-22 15:41:07,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285732954] [2021-11-22 15:41:07,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:41:07,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-22 15:41:07,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:41:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-22 15:41:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 15:41:07,074 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 15:41:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:41:24,323 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-11-22 15:41:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 15:41:24,324 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 15:41:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:41:24,327 INFO L225 Difference]: With dead ends: 80 [2021-11-22 15:41:24,327 INFO L226 Difference]: Without dead ends: 75 [2021-11-22 15:41:24,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=371, Invalid=2079, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 15:41:24,331 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:41:24,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 131 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 510 Invalid, 0 Unknown, 108 Unchecked, 3.0s Time] [2021-11-22 15:41:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-22 15:41:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2021-11-22 15:41:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:41:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-11-22 15:41:24,348 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 30 [2021-11-22 15:41:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:41:24,349 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-11-22 15:41:24,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 15:41:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-11-22 15:41:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 15:41:24,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:41:24,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:41:24,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:41:24,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:41:24,556 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:41:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:41:24,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1560732382, now seen corresponding path program 2 times [2021-11-22 15:41:24,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:41:24,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397436617] [2021-11-22 15:41:24,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:41:24,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:41:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:41:24,566 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:41:24,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 15:41:24,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:41:24,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:41:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:41:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:41:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 15:41:24,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:41:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 15:41:25,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:41:25,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397436617] [2021-11-22 15:41:25,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397436617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:41:25,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:41:25,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-22 15:41:25,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576893756] [2021-11-22 15:41:25,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:41:25,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 15:41:25,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:41:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 15:41:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:41:25,369 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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 15:41:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:41:25,841 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-11-22 15:41:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:41:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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 32 [2021-11-22 15:41:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:41:25,843 INFO L225 Difference]: With dead ends: 86 [2021-11-22 15:41:25,843 INFO L226 Difference]: Without dead ends: 61 [2021-11-22 15:41:25,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:41:25,845 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 116 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:41:25,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 97 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 15:41:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-22 15:41:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-11-22 15:41:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:41:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-11-22 15:41:25,860 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 32 [2021-11-22 15:41:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:41:25,861 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-11-22 15:41:25,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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 15:41:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-11-22 15:41:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 15:41:25,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:41:25,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 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 15:41:25,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:41:26,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:41:26,078 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:41:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:41:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash 524946910, now seen corresponding path program 3 times [2021-11-22 15:41:26,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:41:26,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450048956] [2021-11-22 15:41:26,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:41:26,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:41:26,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:41:26,082 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:41:26,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 15:41:26,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 15:41:26,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:41:26,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-22 15:41:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:41:26,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:41:26,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-11-22 15:41:27,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:41:27,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:41:27,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-11-22 15:41:27,788 INFO L354 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2021-11-22 15:41:27,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 45 [2021-11-22 15:41:27,916 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-22 15:41:27,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-11-22 15:41:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:41:28,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:41:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-22 15:41:42,991 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 15:41:42,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-11-22 15:41:42,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-11-22 15:41:43,006 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 15:41:43,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 183 [2021-11-22 15:41:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:41:43,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:41:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450048956] [2021-11-22 15:41:43,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450048956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:41:43,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:41:43,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-11-22 15:41:43,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962784902] [2021-11-22 15:41:43,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:41:43,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 15:41:43,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:41:43,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 15:41:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 15:41:43,369 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 15:42:16,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 15:42:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:42:19,148 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2021-11-22 15:42:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 15:42:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-22 15:42:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:42:19,152 INFO L225 Difference]: With dead ends: 114 [2021-11-22 15:42:19,152 INFO L226 Difference]: Without dead ends: 95 [2021-11-22 15:42:19,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=396, Invalid=2682, Unknown=2, NotChecked=0, Total=3080 [2021-11-22 15:42:19,156 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 118 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:42:19,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 89 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 607 Invalid, 1 Unknown, 95 Unchecked, 7.1s Time] [2021-11-22 15:42:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-22 15:42:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2021-11-22 15:42:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:42:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-11-22 15:42:19,182 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 32 [2021-11-22 15:42:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:42:19,183 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-11-22 15:42:19,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 15:42:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-11-22 15:42:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 15:42:19,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:42:19,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:42:19,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:42:19,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:42:19,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:42:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:42:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2081795460, now seen corresponding path program 4 times [2021-11-22 15:42:19,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:42:19,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373912770] [2021-11-22 15:42:19,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:42:19,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:42:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:42:19,418 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:42:19,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-22 15:42:19,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:42:19,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:42:19,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:42:19,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:42:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 15:42:19,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:42:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 15:42:20,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:42:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373912770] [2021-11-22 15:42:20,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373912770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:42:20,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:42:20,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-11-22 15:42:20,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100467484] [2021-11-22 15:42:20,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:42:20,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:42:20,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:42:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:42:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:42:20,281 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 15:42:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:42:20,664 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-11-22 15:42:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:42:20,666 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-22 15:42:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:42:20,667 INFO L225 Difference]: With dead ends: 85 [2021-11-22 15:42:20,667 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 15:42:20,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-22 15:42:20,669 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:42:20,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 80 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:42:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 15:42:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-22 15:42:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 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 15:42:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-11-22 15:42:20,691 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 34 [2021-11-22 15:42:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:42:20,691 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-11-22 15:42:20,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 15:42:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-11-22 15:42:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 15:42:20,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:42:20,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:42:20,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:42:20,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:42:20,911 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:42:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:42:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash -681054980, now seen corresponding path program 5 times [2021-11-22 15:42:20,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:42:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234667175] [2021-11-22 15:42:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:42:20,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:42:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:42:20,914 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:42:20,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-22 15:42:21,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 15:42:21,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:42:21,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:42:21,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:42:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:42:21,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:42:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:42:22,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:42:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234667175] [2021-11-22 15:42:22,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234667175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:42:22,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:42:22,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-11-22 15:42:22,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142199832] [2021-11-22 15:42:22,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:42:22,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 15:42:22,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:42:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 15:42:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:42:22,105 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 15:42:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:42:22,998 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2021-11-22 15:42:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 15:42:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-22 15:42:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:42:23,001 INFO L225 Difference]: With dead ends: 116 [2021-11-22 15:42:23,001 INFO L226 Difference]: Without dead ends: 87 [2021-11-22 15:42:23,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:42:23,003 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 155 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:42:23,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 79 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 15:42:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-22 15:42:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 39. [2021-11-22 15:42:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 15:42:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-22 15:42:23,026 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 34 [2021-11-22 15:42:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:42:23,030 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-22 15:42:23,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 15:42:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-22 15:42:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-22 15:42:23,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:42:23,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:42:23,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:42:23,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:42:23,256 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:42:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:42:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash 248734332, now seen corresponding path program 6 times [2021-11-22 15:42:23,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:42:23,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766133218] [2021-11-22 15:42:23,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:42:23,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:42:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:42:23,258 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:42:23,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-22 15:42:23,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-22 15:42:23,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:42:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 15:42:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:42:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 15:42:23,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:42:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 15:42:24,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:42:24,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766133218] [2021-11-22 15:42:24,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766133218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:42:24,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:42:24,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-11-22 15:42:24,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799298250] [2021-11-22 15:42:24,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:42:24,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 15:42:24,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:42:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 15:42:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-11-22 15:42:24,280 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 15:42:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:42:25,485 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-11-22 15:42:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 15:42:25,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 38 [2021-11-22 15:42:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:42:25,487 INFO L225 Difference]: With dead ends: 72 [2021-11-22 15:42:25,487 INFO L226 Difference]: Without dead ends: 61 [2021-11-22 15:42:25,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-11-22 15:42:25,489 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:42:25,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 115 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 15:42:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-22 15:42:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2021-11-22 15:42:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 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 15:42:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-22 15:42:25,502 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 38 [2021-11-22 15:42:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:42:25,503 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-22 15:42:25,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 15:42:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-22 15:42:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 15:42:25,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:42:25,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:42:25,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-22 15:42:25,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:42:25,721 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:42:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:42:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash -284921254, now seen corresponding path program 7 times [2021-11-22 15:42:25,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:42:25,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973208740] [2021-11-22 15:42:25,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:42:25,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:42:25,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:42:25,724 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:42:25,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b093468e-57bc-45ab-a9dd-153968dc6a41/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-22 15:42:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:42:26,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-22 15:42:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:42:26,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 15:42:26,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:26,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:26,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2021-11-22 15:42:27,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:42:27,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:27,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:42:27,921 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-22 15:42:27,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2021-11-22 15:42:28,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:42:28,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:42:28,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2021-11-22 15:42:28,737 INFO L354 Elim1Store]: treesize reduction 79, result has 16.0 percent of original size [2021-11-22 15:42:28,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 58 [2021-11-22 15:42:29,318 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-22 15:42:29,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 43 [2021-11-22 15:42:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:42:30,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:42:45,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 576 treesize of output 504 [2021-11-22 15:42:46,049 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-22 15:42:46,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 9384450 treesize of output 7247458 [2021-11-22 15:54:20,734 WARN L227 SmtUtils]: Spent 11.58m on a formula simplification. DAG size of input: 2777 DAG size of output: 2716 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)