./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF --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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:24:36,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:24:36,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:24:36,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:24:36,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:24:36,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:24:36,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:24:36,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:24:36,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:24:36,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:24:36,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:24:36,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:24:36,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:24:36,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:24:36,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:24:36,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:24:36,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:24:36,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:24:36,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:24:36,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:24:36,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:24:36,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:24:36,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:24:36,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:24:36,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:24:36,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:24:36,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:24:36,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:24:36,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:24:36,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:24:36,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:24:36,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:24:36,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:24:36,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:24:36,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:24:36,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:24:36,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:24:36,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:24:36,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:24:36,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:24:36,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:24:36,724 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:24:36,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:24:36,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:24:36,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:24:36,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:24:36,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:24:36,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:24:36,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:24:36,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:24:36,760 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:24:36,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:24:36,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:24:36,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:24:36,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:24:36,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:24:36,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:24:36,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:24:36,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:24:36,762 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:24:36,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:24:36,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:24:36,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:24:36,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:24:36,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:24:36,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:24:36,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:24:36,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:24:36,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:24:36,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:24:36,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:24:36,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:24:36,766 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:24:36,767 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:24:36,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:24:36,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:24:36,767 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_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2021-11-20 07:24:37,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:24:37,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:24:37,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:24:37,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:24:37,236 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:24:37,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-11-20 07:24:37,329 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/data/5516d1308/cf5d6613112c408080f525c905242ca3/FLAG28bb550fe [2021-11-20 07:24:38,081 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:24:38,082 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-11-20 07:24:38,090 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/data/5516d1308/cf5d6613112c408080f525c905242ca3/FLAG28bb550fe [2021-11-20 07:24:38,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/data/5516d1308/cf5d6613112c408080f525c905242ca3 [2021-11-20 07:24:38,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:24:38,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:24:38,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:24:38,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:24:38,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:24:38,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67461b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38, skipping insertion in model container [2021-11-20 07:24:38,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:24:38,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:24:38,683 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_4c96896d-9de5-44e1-a104-6e9acf15f13f/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-11-20 07:24:38,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:24:38,740 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:24:38,758 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_4c96896d-9de5-44e1-a104-6e9acf15f13f/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-11-20 07:24:38,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:24:38,813 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:24:38,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38 WrapperNode [2021-11-20 07:24:38,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:24:38,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:24:38,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:24:38,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:24:38,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,874 INFO L137 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2021-11-20 07:24:38,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:24:38,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:24:38,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:24:38,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:24:38,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:24:38,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:24:38,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:24:38,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:24:38,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (1/1) ... [2021-11-20 07:24:38,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:24:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:24:38,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:24:38,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:24:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:24:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:24:39,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:24:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:24:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:24:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:24:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:24:39,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:24:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:24:39,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 07:24:39,034 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 07:24:39,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:24:39,217 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:24:39,219 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:24:39,637 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:24:39,646 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:24:39,647 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-20 07:24:39,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:24:39 BoogieIcfgContainer [2021-11-20 07:24:39,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:24:39,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:24:39,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:24:39,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:24:39,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:24:38" (1/3) ... [2021-11-20 07:24:39,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d08700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:24:39, skipping insertion in model container [2021-11-20 07:24:39,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:24:38" (2/3) ... [2021-11-20 07:24:39,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d08700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:24:39, skipping insertion in model container [2021-11-20 07:24:39,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:24:39" (3/3) ... [2021-11-20 07:24:39,669 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2021-11-20 07:24:39,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:24:39,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:24:39,734 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:24:39,743 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 [2021-11-20 07:24:39,744 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:24:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:24:39,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:24:39,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:39,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:39,787 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:39,794 INFO L85 PathProgramCache]: Analyzing trace with hash -750888739, now seen corresponding path program 1 times [2021-11-20 07:24:39,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:39,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583483845] [2021-11-20 07:24:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:39,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:24:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:24:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:24:40,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583483845] [2021-11-20 07:24:40,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583483845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:40,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:40,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:24:40,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941668826] [2021-11-20 07:24:40,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:40,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:24:40,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:40,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:24:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:24:40,104 INFO L87 Difference]: Start difference. First operand has 42 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:24:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:40,220 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2021-11-20 07:24:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:24:40,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2021-11-20 07:24:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:40,265 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:24:40,265 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 07:24:40,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:24:40,293 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:40,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:24:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 07:24:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 07:24:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:24:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-20 07:24:40,349 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2021-11-20 07:24:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:40,350 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-20 07:24:40,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:24:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-20 07:24:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:24:40,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:40,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:40,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:24:40,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash 221792227, now seen corresponding path program 1 times [2021-11-20 07:24:40,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:40,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011810338] [2021-11-20 07:24:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:40,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:24:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:24:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:24:40,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:40,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011810338] [2021-11-20 07:24:40,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011810338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:40,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:40,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:24:40,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380726822] [2021-11-20 07:24:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:40,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:24:40,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:24:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:24:40,695 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:24:42,761 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:24:43,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:43,338 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2021-11-20 07:24:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:24:43,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2021-11-20 07:24:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:43,343 INFO L225 Difference]: With dead ends: 97 [2021-11-20 07:24:43,344 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 07:24:43,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:24:43,347 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 72 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:43,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 283 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 07:24:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 07:24:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2021-11-20 07:24:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:24:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-20 07:24:43,375 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 37 [2021-11-20 07:24:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:43,376 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-20 07:24:43,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:24:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-20 07:24:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:24:43,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:43,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:43,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:24:43,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:43,381 INFO L85 PathProgramCache]: Analyzing trace with hash 747513669, now seen corresponding path program 1 times [2021-11-20 07:24:43,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:43,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14391056] [2021-11-20 07:24:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:43,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:43,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:43,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:24:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:43,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:24:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:43,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:24:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:24:43,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:43,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14391056] [2021-11-20 07:24:43,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14391056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:43,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162289256] [2021-11-20 07:24:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:43,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:43,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:24:43,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:24:43,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:24:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 07:24:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:24:44,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:24:44,276 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 7 treesize of output 6 [2021-11-20 07:24:44,430 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:24:44,431 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 11 treesize of output 11 [2021-11-20 07:24:44,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-20 07:24:44,706 INFO L354 Elim1Store]: treesize reduction 36, result has 12.2 percent of original size [2021-11-20 07:24:44,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 36 [2021-11-20 07:24:51,043 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-20 07:24:51,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 44 [2021-11-20 07:24:57,374 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:24:57,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 57 [2021-11-20 07:24:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:24:57,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:25:30,829 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_check_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-20 07:25:32,903 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (|ULTIMATE.start_check_~i~0#1| Int) (|ULTIMATE.start_main_~i~1#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse0 (* |ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ .cse0 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse0))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-20 07:25:34,925 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_4| Int) (|v_ULTIMATE.start_downsweep_~n#1_5| Int) (|ULTIMATE.start_check_~i~0#1| Int) (|ULTIMATE.start_main_~i~1#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse0 (* |ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) (+ .cse0 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse0))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_4| (* |v_ULTIMATE.start_downsweep_~n#1_5| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-20 07:25:42,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162289256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:42,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:25:42,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 19 [2021-11-20 07:25:42,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808710904] [2021-11-20 07:25:42,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:25:42,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:25:42,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:25:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=377, Unknown=23, NotChecked=126, Total=600 [2021-11-20 07:25:42,141 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:25:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:44,784 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-20 07:25:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:25:44,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-11-20 07:25:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:44,786 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:25:44,787 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 07:25:44,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=194, Invalid=724, Unknown=24, NotChecked=180, Total=1122 [2021-11-20 07:25:44,789 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 134 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:44,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 299 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 164 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2021-11-20 07:25:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 07:25:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-11-20 07:25:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:25:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-11-20 07:25:44,803 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 39 [2021-11-20 07:25:44,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:44,804 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-11-20 07:25:44,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 07:25:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-11-20 07:25:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:25:44,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:44,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:44,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:45,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:45,034 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1715230204, now seen corresponding path program 1 times [2021-11-20 07:25:45,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:45,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882216353] [2021-11-20 07:25:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:45,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:45,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:25:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:45,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:25:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:45,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:25:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:45,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:25:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:25:45,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882216353] [2021-11-20 07:25:45,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882216353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829885826] [2021-11-20 07:25:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:45,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:45,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:45,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:45,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:25:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:25:45,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:25:45,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:25:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:25:45,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829885826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:25:45,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:25:45,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2021-11-20 07:25:45,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974515616] [2021-11-20 07:25:45,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:25:45,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:25:45,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:45,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:25:45,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:25:45,664 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:46,072 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2021-11-20 07:25:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:25:46,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-11-20 07:25:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:46,075 INFO L225 Difference]: With dead ends: 116 [2021-11-20 07:25:46,075 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 07:25:46,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:25:46,077 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 115 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:46,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 277 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:25:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 07:25:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2021-11-20 07:25:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:25:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-20 07:25:46,088 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 43 [2021-11-20 07:25:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:46,089 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-20 07:25:46,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-20 07:25:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:25:46,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:46,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:46,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:46,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:46,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1080974370, now seen corresponding path program 2 times [2021-11-20 07:25:46,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:46,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382792315] [2021-11-20 07:25:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:46,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:46,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:25:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:46,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:25:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:46,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:25:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:46,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:25:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:25:46,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382792315] [2021-11-20 07:25:46,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382792315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:46,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460567635] [2021-11-20 07:25:46,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:25:46,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:46,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:46,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:25:46,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:25:46,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:25:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:25:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:25:46,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:25:46,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460567635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:25:46,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:25:46,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-20 07:25:46,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594226708] [2021-11-20 07:25:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:25:46,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:25:46,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:25:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:25:46,743 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:46,918 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-11-20 07:25:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:25:46,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-11-20 07:25:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:46,925 INFO L225 Difference]: With dead ends: 66 [2021-11-20 07:25:46,925 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 07:25:46,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:25:46,932 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:46,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 169 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:25:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 07:25:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-11-20 07:25:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:25:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-20 07:25:46,957 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 45 [2021-11-20 07:25:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:46,958 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-20 07:25:46,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-20 07:25:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:25:46,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:46,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:47,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:47,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:47,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:47,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:47,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1924122647, now seen corresponding path program 1 times [2021-11-20 07:25:47,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:47,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189081455] [2021-11-20 07:25:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:47,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:25:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:25:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:25:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:25:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:25:47,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189081455] [2021-11-20 07:25:47,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189081455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:25:47,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:25:47,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:25:47,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408037741] [2021-11-20 07:25:47,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:25:47,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:25:47,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:25:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:25:47,264 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:47,305 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-11-20 07:25:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:25:47,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-11-20 07:25:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:47,307 INFO L225 Difference]: With dead ends: 65 [2021-11-20 07:25:47,307 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 07:25:47,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:25:47,309 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 3 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:47,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 110 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:25:47,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 07:25:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-20 07:25:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:25:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-11-20 07:25:47,317 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 48 [2021-11-20 07:25:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-11-20 07:25:47,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-11-20 07:25:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:25:47,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:47,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:47,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:25:47,320 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:47,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1397539149, now seen corresponding path program 1 times [2021-11-20 07:25:47,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:47,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089882745] [2021-11-20 07:25:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:47,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:25:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:25:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:25:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:25:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:25:47,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:47,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089882745] [2021-11-20 07:25:47,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089882745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918411449] [2021-11-20 07:25:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:47,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:47,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:47,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:47,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:25:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:25:47,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:25:47,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:25:47,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918411449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:25:47,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:25:47,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 12 [2021-11-20 07:25:47,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776367436] [2021-11-20 07:25:47,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:25:47,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:25:47,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:25:47,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:25:47,869 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:47,961 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-11-20 07:25:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:25:47,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-11-20 07:25:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:47,963 INFO L225 Difference]: With dead ends: 61 [2021-11-20 07:25:47,963 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 07:25:47,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:25:47,965 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:47,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:25:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 07:25:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-11-20 07:25:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:25:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-20 07:25:47,975 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 49 [2021-11-20 07:25:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:47,975 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-20 07:25:47,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-20 07:25:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:25:47,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:47,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:48,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:48,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:48,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:48,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1418623757, now seen corresponding path program 1 times [2021-11-20 07:25:48,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:48,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673853316] [2021-11-20 07:25:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:48,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:25:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:25:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:25:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:25:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:25:48,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673853316] [2021-11-20 07:25:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673853316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:48,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80978264] [2021-11-20 07:25:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:48,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:48,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:48,410 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:48,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:25:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:25:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:25:48,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:25:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:25:48,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80978264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:25:48,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:25:48,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2021-11-20 07:25:48,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354652561] [2021-11-20 07:25:48,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:25:48,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:25:48,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:25:48,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:25:48,979 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:51,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:25:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:51,757 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2021-11-20 07:25:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:25:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-20 07:25:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:51,759 INFO L225 Difference]: With dead ends: 99 [2021-11-20 07:25:51,759 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 07:25:51,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:25:51,761 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:51,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 334 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 281 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 07:25:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 07:25:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2021-11-20 07:25:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:25:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-20 07:25:51,773 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 52 [2021-11-20 07:25:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:51,774 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-20 07:25:51,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:25:51,774 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-20 07:25:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:25:51,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:51,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:51,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:52,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 07:25:52,002 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:52,002 INFO L85 PathProgramCache]: Analyzing trace with hash -282483074, now seen corresponding path program 1 times [2021-11-20 07:25:52,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:52,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586745375] [2021-11-20 07:25:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:52,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:52,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:25:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:52,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:25:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:52,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:25:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:52,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:25:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:25:52,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:52,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586745375] [2021-11-20 07:25:52,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586745375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:52,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480171924] [2021-11-20 07:25:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:52,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:52,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:52,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:52,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:25:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-20 07:25:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:52,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:25:52,453 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 7 treesize of output 6 [2021-11-20 07:25:52,584 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:25:52,585 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 11 treesize of output 11 [2021-11-20 07:25:52,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-20 07:25:52,841 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 36 treesize of output 32 [2021-11-20 07:25:52,980 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 32 treesize of output 28 [2021-11-20 07:25:53,350 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 59 treesize of output 53 [2021-11-20 07:25:53,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2021-11-20 07:25:55,811 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 83 treesize of output 75 [2021-11-20 07:26:04,437 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:26:04,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 143 [2021-11-20 07:26:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:26:04,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:28:55,539 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_check_~a0#1.offset_7| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~n#1_8| Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse6 (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (store .cse6 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2)))))) (let ((.cse4 (store (let ((.cse5 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse5 .cse2 (+ (select .cse5 .cse2) (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_8| 4) (- 4)) 0))) (let ((.cse0 (select .cse4 .cse2))) (or (not (= .cse0 0)) (let ((.cse1 (store (store .cse4 .cse2 (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse0)) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0))) (= (select .cse1 .cse2) (+ (select (select (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |v_ULTIMATE.start_check_~a0#1.offset_7|) .cse0))) (<= |v_ULTIMATE.start_downsweep_~n#1_8| 1) (< |ULTIMATE.start_main_~a0~0#1.offset| |v_ULTIMATE.start_check_~a0#1.offset_7|))))))) is different from false [2021-11-20 07:29:35,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480171924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:35,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:35,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 26] total 33 [2021-11-20 07:29:35,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986403722] [2021-11-20 07:29:35,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:35,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 07:29:35,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 07:29:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2197, Unknown=62, NotChecked=98, Total=2652 [2021-11-20 07:29:35,954 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 33 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 29 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:29:38,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:29:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:47,714 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2021-11-20 07:29:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 07:29:47,714 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 29 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2021-11-20 07:29:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:47,716 INFO L225 Difference]: With dead ends: 134 [2021-11-20 07:29:47,716 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 07:29:47,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 228.8s TimeCoverageRelationStatistics Valid=1101, Invalid=5647, Unknown=62, NotChecked=162, Total=6972 [2021-11-20 07:29:47,720 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:47,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 403 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 552 Invalid, 1 Unknown, 337 Unchecked, 3.1s Time] [2021-11-20 07:29:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 07:29:47,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2021-11-20 07:29:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:29:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2021-11-20 07:29:47,747 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 53 [2021-11-20 07:29:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:47,747 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2021-11-20 07:29:47,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 29 states have internal predecessors, (75), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:29:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2021-11-20 07:29:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 07:29:47,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:47,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:47,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 07:29:47,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:47,974 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:47,975 INFO L85 PathProgramCache]: Analyzing trace with hash 59219556, now seen corresponding path program 1 times [2021-11-20 07:29:47,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:47,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759166130] [2021-11-20 07:29:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:47,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:48,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:29:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:48,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:29:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:48,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:29:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:29:48,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:48,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759166130] [2021-11-20 07:29:48,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759166130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903159216] [2021-11-20 07:29:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:48,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:48,230 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:48,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:29:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:48,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:29:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:29:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:29:48,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903159216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:48,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:48,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2021-11-20 07:29:48,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516203018] [2021-11-20 07:29:48,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:48,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:29:48,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:29:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:29:48,920 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:29:51,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:29:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:52,352 INFO L93 Difference]: Finished difference Result 267 states and 331 transitions. [2021-11-20 07:29:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:29:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-20 07:29:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:52,357 INFO L225 Difference]: With dead ends: 267 [2021-11-20 07:29:52,357 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 07:29:52,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 07:29:52,360 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 269 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:52,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 494 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 344 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 07:29:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 07:29:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 110. [2021-11-20 07:29:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 99 states have internal predecessors, (123), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:29:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2021-11-20 07:29:52,393 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 55 [2021-11-20 07:29:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:52,394 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2021-11-20 07:29:52,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:29:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2021-11-20 07:29:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:29:52,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:52,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:52,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:52,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:52,622 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1049644789, now seen corresponding path program 2 times [2021-11-20 07:29:52,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:52,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178882112] [2021-11-20 07:29:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:52,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:52,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:52,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:29:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:29:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:52,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:29:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:29:52,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178882112] [2021-11-20 07:29:52,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178882112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522942905] [2021-11-20 07:29:52,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:52,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:52,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:52,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:53,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:29:53,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:53,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:29:53,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:29:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:29:54,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522942905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:54,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:54,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 25 [2021-11-20 07:29:54,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799569331] [2021-11-20 07:29:54,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:54,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 07:29:54,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 07:29:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:29:54,070 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:29:56,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:29:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:58,185 INFO L93 Difference]: Finished difference Result 235 states and 295 transitions. [2021-11-20 07:29:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:29:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-11-20 07:29:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:58,188 INFO L225 Difference]: With dead ends: 235 [2021-11-20 07:29:58,189 INFO L226 Difference]: Without dead ends: 214 [2021-11-20 07:29:58,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:29:58,191 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 266 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:58,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 607 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 819 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 07:29:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-20 07:29:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 111. [2021-11-20 07:29:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 100 states have (on average 1.21) internal successors, (121), 100 states have internal predecessors, (121), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:29:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2021-11-20 07:29:58,229 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 57 [2021-11-20 07:29:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:58,230 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2021-11-20 07:29:58,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:29:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2021-11-20 07:29:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:29:58,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:58,232 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:58,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:58,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:29:58,432 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1613883249, now seen corresponding path program 2 times [2021-11-20 07:29:58,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:58,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36364719] [2021-11-20 07:29:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:58,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:58,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:29:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:29:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:58,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:29:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:58,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:29:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:29:58,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:58,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36364719] [2021-11-20 07:29:58,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36364719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:58,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944049982] [2021-11-20 07:29:58,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:58,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:58,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:58,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:58,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:29:58,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:58,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:29:58,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:29:59,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:29:59,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944049982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:59,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:59,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2021-11-20 07:29:59,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569773906] [2021-11-20 07:29:59,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:59,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 07:29:59,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 07:29:59,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:29:59,648 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:30:01,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:30:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:04,249 INFO L93 Difference]: Finished difference Result 348 states and 418 transitions. [2021-11-20 07:30:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:30:04,250 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2021-11-20 07:30:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:04,253 INFO L225 Difference]: With dead ends: 348 [2021-11-20 07:30:04,253 INFO L226 Difference]: Without dead ends: 291 [2021-11-20 07:30:04,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=652, Invalid=2888, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 07:30:04,258 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 328 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:04,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 717 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 860 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 07:30:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-20 07:30:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 115. [2021-11-20 07:30:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 104 states have internal predecessors, (125), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:30:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2021-11-20 07:30:04,289 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 58 [2021-11-20 07:30:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:04,289 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2021-11-20 07:30:04,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:30:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2021-11-20 07:30:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:30:04,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:04,292 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:04,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:04,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:04,497 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:04,498 INFO L85 PathProgramCache]: Analyzing trace with hash 116417284, now seen corresponding path program 3 times [2021-11-20 07:30:04,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:04,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765350783] [2021-11-20 07:30:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:04,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:04,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:04,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:30:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:04,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:30:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:04,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:30:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:30:04,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765350783] [2021-11-20 07:30:04,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765350783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123593996] [2021-11-20 07:30:04,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:30:04,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:04,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:04,711 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:04,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:30:04,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:30:04,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:30:04,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:30:05,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:30:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123593996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:05,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:05,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2021-11-20 07:30:05,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711339006] [2021-11-20 07:30:05,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:05,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:30:05,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:30:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:30:05,484 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:30:07,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:30:09,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:30:11,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:30:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:13,271 INFO L93 Difference]: Finished difference Result 280 states and 332 transitions. [2021-11-20 07:30:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 07:30:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2021-11-20 07:30:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:13,273 INFO L225 Difference]: With dead ends: 280 [2021-11-20 07:30:13,273 INFO L226 Difference]: Without dead ends: 220 [2021-11-20 07:30:13,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=1412, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 07:30:13,276 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 266 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 54 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:13,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 419 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 473 Invalid, 3 Unknown, 0 Unchecked, 7.1s Time] [2021-11-20 07:30:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-20 07:30:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 126. [2021-11-20 07:30:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 115 states have (on average 1.208695652173913) internal successors, (139), 115 states have internal predecessors, (139), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:30:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2021-11-20 07:30:13,312 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 58 [2021-11-20 07:30:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:13,313 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2021-11-20 07:30:13,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:30:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2021-11-20 07:30:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:30:13,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:13,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:13,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:13,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:30:13,542 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:13,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1156626236, now seen corresponding path program 4 times [2021-11-20 07:30:13,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:13,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149224312] [2021-11-20 07:30:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:13,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:13,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:13,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:30:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:13,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:30:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:13,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:30:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:30:13,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149224312] [2021-11-20 07:30:13,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149224312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379145995] [2021-11-20 07:30:13,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:30:13,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:13,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:13,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:30:13,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:30:13,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:30:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:30:14,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:30:14,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379145995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:14,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:14,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2021-11-20 07:30:14,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277598171] [2021-11-20 07:30:14,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:30:14,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:30:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:30:14,264 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:30:16,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:30:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:16,880 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2021-11-20 07:30:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:30:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2021-11-20 07:30:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:16,882 INFO L225 Difference]: With dead ends: 201 [2021-11-20 07:30:16,883 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 07:30:16,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:30:16,884 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 61 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:16,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 379 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 07:30:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 07:30:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 94. [2021-11-20 07:30:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.197674418604651) internal successors, (103), 86 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:30:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2021-11-20 07:30:16,914 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 58 [2021-11-20 07:30:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:16,914 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2021-11-20 07:30:16,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:30:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2021-11-20 07:30:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 07:30:16,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:16,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:16,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:17,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:30:17,138 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:17,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1999992325, now seen corresponding path program 3 times [2021-11-20 07:30:17,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:17,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031164423] [2021-11-20 07:30:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:17,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:17,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 07:30:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:17,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:30:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:17,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 07:30:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:30:17,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:17,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031164423] [2021-11-20 07:30:17,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031164423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:17,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909114253] [2021-11-20 07:30:17,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:30:17,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:17,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:17,316 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:17,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:30:17,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 07:30:17,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:17,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:30:17,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:30:18,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:30:19,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909114253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:19,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:19,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 29 [2021-11-20 07:30:19,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803917449] [2021-11-20 07:30:19,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:19,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:30:19,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:30:19,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:30:19,839 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 29 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 28 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:30:22,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:30:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:24,154 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2021-11-20 07:30:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:30:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 28 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 59 [2021-11-20 07:30:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:24,156 INFO L225 Difference]: With dead ends: 203 [2021-11-20 07:30:24,156 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 07:30:24,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=436, Invalid=2114, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 07:30:24,159 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 197 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:24,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 561 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 479 Invalid, 1 Unknown, 75 Unchecked, 2.9s Time] [2021-11-20 07:30:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 07:30:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2021-11-20 07:30:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 108 states have internal predecessors, (130), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:30:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2021-11-20 07:30:24,188 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 59 [2021-11-20 07:30:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:24,189 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2021-11-20 07:30:24,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 28 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:30:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2021-11-20 07:30:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 07:30:24,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:24,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:24,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:24,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:30:24,393 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash -4426440, now seen corresponding path program 5 times [2021-11-20 07:30:24,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:24,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611539414] [2021-11-20 07:30:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:24,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:24,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:24,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:30:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:24,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:30:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:24,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:30:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:30:24,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611539414] [2021-11-20 07:30:24,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611539414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:24,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951822070] [2021-11-20 07:30:24,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:30:24,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:24,570 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:24,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:30:24,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 07:30:24,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:30:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:30:25,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:30:25,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951822070] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:25,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:25,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 11 [2021-11-20 07:30:25,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804626523] [2021-11-20 07:30:25,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:25,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:30:25,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:30:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:30:25,576 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:30:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:25,877 INFO L93 Difference]: Finished difference Result 156 states and 190 transitions. [2021-11-20 07:30:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:30:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2021-11-20 07:30:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:25,880 INFO L225 Difference]: With dead ends: 156 [2021-11-20 07:30:25,880 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 07:30:25,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:30:25,882 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 74 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:25,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 185 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:30:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 07:30:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2021-11-20 07:30:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 113 states have (on average 1.2123893805309736) internal successors, (137), 113 states have internal predecessors, (137), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:30:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2021-11-20 07:30:25,924 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 61 [2021-11-20 07:30:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:25,924 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2021-11-20 07:30:25,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:30:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2021-11-20 07:30:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:30:25,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:25,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:25,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:26,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:30:26,138 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:26,138 INFO L85 PathProgramCache]: Analyzing trace with hash 108996138, now seen corresponding path program 6 times [2021-11-20 07:30:26,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:26,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348244424] [2021-11-20 07:30:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:26,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:30:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:30:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:30:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:30:26,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:26,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348244424] [2021-11-20 07:30:26,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348244424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610089263] [2021-11-20 07:30:26,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:30:26,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:26,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:26,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:26,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:30:26,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 07:30:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:26,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-20 07:30:26,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:26,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:30:26,646 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 7 treesize of output 6 [2021-11-20 07:30:26,771 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:30:26,771 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 11 treesize of output 11 [2021-11-20 07:30:26,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-20 07:30:27,000 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 36 treesize of output 32 [2021-11-20 07:30:27,129 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 36 treesize of output 32 [2021-11-20 07:30:27,258 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 39 treesize of output 35 [2021-11-20 07:30:30,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2021-11-20 07:30:32,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 104 [2021-11-20 07:30:41,482 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:30:41,518 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 176 treesize of output 170 [2021-11-20 07:30:52,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 380 treesize of output 378 [2021-11-20 07:30:56,564 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 406 treesize of output 398 [2021-11-20 07:31:05,135 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:31:05,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1224 treesize of output 1212 [2021-11-20 07:31:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:31:05,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:45,222 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_49| Int) (|v_ULTIMATE.start_main_~i~1#1_48| Int) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_50| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2| Int) (|aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44| Int) (|aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| Int)) (let ((.cse1 (+ 4 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (.cse2 (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| (let ((.cse12 (let ((.cse14 (store (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|) |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (.cse15 (* |v_ULTIMATE.start_main_~i~1#1_49| 4))) (store .cse14 (+ .cse15 |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse14) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) (+ .cse15 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))))) (.cse13 (* |v_ULTIMATE.start_main_~i~1#1_48| 4))) (store .cse12 (+ .cse13 |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse12) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) (+ .cse13 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))))))) (let ((.cse3 (store (let ((.cse6 (+ 12 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (.cse5 (let ((.cse9 (* |v_ULTIMATE.start_upsweep_~left~0#1_50| 4))) (let ((.cse7 (let ((.cse10 (select .cse2 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|)) (.cse11 (+ .cse9 4 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (store .cse10 .cse11 (+ (select .cse10 (+ .cse9 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (select .cse10 .cse11))))) (.cse8 (+ .cse9 12 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (store .cse7 .cse8 (+ (select .cse7 (+ .cse9 8 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (select .cse7 .cse8))))))) (store .cse5 .cse6 (+ (select .cse5 .cse6) (select .cse5 .cse1)))) (+ (- 4) (* |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| 4) (* |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44| 16) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|) 0))) (let ((.cse4 (select .cse3 .cse1))) (or (< |v_ULTIMATE.start_main_~i~1#1_48| (+ |v_ULTIMATE.start_main_~i~1#1_49| 1)) (< 0 |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44|) (let ((.cse0 (store (store .cse3 .cse1 (+ (select .cse3 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|) .cse4)) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3| .cse4))) (= (select .cse0 .cse1) (select (select (store .cse2 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| .cse0) |c_#Ultimate.meminit_#ptr.base|) |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|))) (< |v_ULTIMATE.start_main_~i~1#1_49| 1) (not (= .cse4 0)) (<= 4 |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44|) (< |v_ULTIMATE.start_upsweep_~left~0#1_50| 0) (<= (+ |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| (* 4 |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44|)) (+ |v_ULTIMATE.start_upsweep_~left~0#1_50| 2))))))) is different from false [2021-11-20 07:33:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 23 refuted. 9 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:33:48,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610089263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:48,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:33:48,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 34, 32] total 70 [2021-11-20 07:33:48,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196456310] [2021-11-20 07:33:48,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:48,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-20 07:33:48,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-20 07:33:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=4014, Unknown=47, NotChecked=134, Total=4830 [2021-11-20 07:33:48,174 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand has 70 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 65 states have internal predecessors, (129), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 07:33:50,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:33:53,704 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array Int Int)) 0))) (and (exists ((|v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_3| Int)) (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_3|) 1)) (= .cse0 (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| .cse0)) (forall ((|v_ULTIMATE.start_main_~i~1#1_49| Int) (|v_ULTIMATE.start_main_~i~1#1_48| Int) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_50| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2| Int) (|aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44| Int) (|aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| Int)) (let ((.cse2 (+ 4 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (.cse3 (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| (let ((.cse13 (let ((.cse15 (store (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|) |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (.cse16 (* |v_ULTIMATE.start_main_~i~1#1_49| 4))) (store .cse15 (+ .cse16 |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse15) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) (+ .cse16 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))))) (.cse14 (* |v_ULTIMATE.start_main_~i~1#1_48| 4))) (store .cse13 (+ .cse14 |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse13) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) (+ .cse14 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))))))) (let ((.cse4 (store (let ((.cse7 (+ 12 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (.cse6 (let ((.cse10 (* |v_ULTIMATE.start_upsweep_~left~0#1_50| 4))) (let ((.cse8 (let ((.cse11 (select .cse3 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|)) (.cse12 (+ .cse10 4 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (store .cse11 .cse12 (+ (select .cse11 (+ .cse10 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (select .cse11 .cse12))))) (.cse9 (+ .cse10 12 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (store .cse8 .cse9 (+ (select .cse8 (+ .cse10 8 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (select .cse8 .cse9))))))) (store .cse6 .cse7 (+ (select .cse6 .cse7) (select .cse6 .cse2)))) (+ (- 4) (* |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| 4) (* |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44| 16) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|) 0))) (let ((.cse5 (select .cse4 .cse2))) (or (< |v_ULTIMATE.start_main_~i~1#1_48| (+ |v_ULTIMATE.start_main_~i~1#1_49| 1)) (< 0 |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44|) (let ((.cse1 (store (store .cse4 .cse2 (+ (select .cse4 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|) .cse5)) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3| .cse5))) (= (select .cse1 .cse2) (select (select (store .cse3 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| .cse1) |c_#Ultimate.meminit_#ptr.base|) |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|))) (< |v_ULTIMATE.start_main_~i~1#1_49| 1) (not (= .cse5 0)) (<= 4 |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44|) (< |v_ULTIMATE.start_upsweep_~left~0#1_50| 0) (<= (+ |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| (* 4 |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44|)) (+ |v_ULTIMATE.start_upsweep_~left~0#1_50| 2))))))))) is different from false [2021-11-20 07:33:56,433 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| ((as const (Array Int Int)) 0))) (forall ((|v_ULTIMATE.start_main_~i~1#1_49| Int) (|v_ULTIMATE.start_main_~i~1#1_48| Int) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_50| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2| Int) (|aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44| Int) (|aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| Int)) (let ((.cse1 (+ 4 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (.cse2 (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| (let ((.cse12 (let ((.cse14 (store (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|) |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (.cse15 (* |v_ULTIMATE.start_main_~i~1#1_49| 4))) (store .cse14 (+ .cse15 |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse14) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) (+ .cse15 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))))) (.cse13 (* |v_ULTIMATE.start_main_~i~1#1_48| 4))) (store .cse12 (+ .cse13 |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse12) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) (+ .cse13 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))))))) (let ((.cse3 (store (let ((.cse6 (+ 12 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (.cse5 (let ((.cse9 (* |v_ULTIMATE.start_upsweep_~left~0#1_50| 4))) (let ((.cse7 (let ((.cse10 (select .cse2 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|)) (.cse11 (+ .cse9 4 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (store .cse10 .cse11 (+ (select .cse10 (+ .cse9 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (select .cse10 .cse11))))) (.cse8 (+ .cse9 12 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|))) (store .cse7 .cse8 (+ (select .cse7 (+ .cse9 8 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|)) (select .cse7 .cse8))))))) (store .cse5 .cse6 (+ (select .cse5 .cse6) (select .cse5 .cse1)))) (+ (- 4) (* |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| 4) (* |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44| 16) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|) 0))) (let ((.cse4 (select .cse3 .cse1))) (or (< |v_ULTIMATE.start_main_~i~1#1_48| (+ |v_ULTIMATE.start_main_~i~1#1_49| 1)) (< 0 |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44|) (let ((.cse0 (store (store .cse3 .cse1 (+ (select .cse3 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3|) .cse4)) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_3| .cse4))) (= (select .cse0 .cse1) (select (select (store .cse2 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| .cse0) |c_#Ultimate.meminit_#ptr.base|) |v_ULTIMATE.start_main_#t~malloc16#1.offset_BEFORE_CALL_2|))) (< |v_ULTIMATE.start_main_~i~1#1_49| 1) (not (= .cse4 0)) (<= 4 |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44|) (< |v_ULTIMATE.start_upsweep_~left~0#1_50| 0) (<= (+ |aux_mod_v_ULTIMATE.start_downsweep_~n#1_16_44| (* 4 |aux_div_v_ULTIMATE.start_downsweep_~n#1_16_44|)) (+ |v_ULTIMATE.start_upsweep_~left~0#1_50| 2)))))))) is different from false [2021-11-20 07:34:35,039 WARN L227 SmtUtils]: Spent 16.92s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:35:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:28,980 INFO L93 Difference]: Finished difference Result 261 states and 332 transitions. [2021-11-20 07:35:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-20 07:35:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 65 states have internal predecessors, (129), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 64 [2021-11-20 07:35:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:28,983 INFO L225 Difference]: With dead ends: 261 [2021-11-20 07:35:28,983 INFO L226 Difference]: Without dead ends: 230 [2021-11-20 07:35:28,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 276.3s TimeCoverageRelationStatistics Valid=1632, Invalid=8404, Unknown=76, NotChecked=600, Total=10712 [2021-11-20 07:35:28,989 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:28,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 558 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 434 Invalid, 1 Unknown, 531 Unchecked, 2.8s Time] [2021-11-20 07:35:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-20 07:35:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 199. [2021-11-20 07:35:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 188 states have (on average 1.2819148936170213) internal successors, (241), 188 states have internal predecessors, (241), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:35:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 255 transitions. [2021-11-20 07:35:29,078 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 255 transitions. Word has length 64 [2021-11-20 07:35:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:29,079 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 255 transitions. [2021-11-20 07:35:29,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 65 states have internal predecessors, (129), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 07:35:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 255 transitions. [2021-11-20 07:35:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:35:29,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:29,081 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:29,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:29,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:29,306 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:35:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1415802873, now seen corresponding path program 7 times [2021-11-20 07:35:29,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:29,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265518383] [2021-11-20 07:35:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:29,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:29,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:29,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:35:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:35:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:29,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:35:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:35:29,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:29,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265518383] [2021-11-20 07:35:29,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265518383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377831622] [2021-11-20 07:35:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:35:29,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:29,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:29,490 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:29,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:35:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:35:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:35:29,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:35:30,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377831622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:30,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:30,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-11-20 07:35:30,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495684985] [2021-11-20 07:35:30,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:30,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:35:30,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:30,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:35:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:35:30,267 INFO L87 Difference]: Start difference. First operand 199 states and 255 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:35:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:30,688 INFO L93 Difference]: Finished difference Result 244 states and 315 transitions. [2021-11-20 07:35:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:35:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2021-11-20 07:35:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:30,691 INFO L225 Difference]: With dead ends: 244 [2021-11-20 07:35:30,691 INFO L226 Difference]: Without dead ends: 207 [2021-11-20 07:35:30,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:35:30,692 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:30,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 269 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:35:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-20 07:35:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2021-11-20 07:35:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 190 states have (on average 1.2578947368421052) internal successors, (239), 190 states have internal predecessors, (239), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:35:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 253 transitions. [2021-11-20 07:35:30,771 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 253 transitions. Word has length 67 [2021-11-20 07:35:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 253 transitions. [2021-11-20 07:35:30,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:35:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 253 transitions. [2021-11-20 07:35:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:35:30,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:30,774 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:30,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:30,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:35:30,990 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:35:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash -48290196, now seen corresponding path program 8 times [2021-11-20 07:35:30,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:30,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202516096] [2021-11-20 07:35:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:30,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:31,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:31,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:35:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:31,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:35:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:31,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:35:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:35:31,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:31,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202516096] [2021-11-20 07:35:31,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202516096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:31,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078323214] [2021-11-20 07:35:31,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:35:31,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:31,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:31,258 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:31,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:35:31,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:35:31,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:31,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:35:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:35:31,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:35:32,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078323214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:32,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:32,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 24 [2021-11-20 07:35:32,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336918991] [2021-11-20 07:35:32,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:32,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:35:32,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:35:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:35:32,079 INFO L87 Difference]: Start difference. First operand 201 states and 253 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:35:34,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 07:35:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:36,853 INFO L93 Difference]: Finished difference Result 626 states and 799 transitions. [2021-11-20 07:35:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 07:35:36,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2021-11-20 07:35:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:36,858 INFO L225 Difference]: With dead ends: 626 [2021-11-20 07:35:36,859 INFO L226 Difference]: Without dead ends: 609 [2021-11-20 07:35:36,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=990, Invalid=3566, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 07:35:36,862 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 319 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:36,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 634 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 570 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 07:35:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-20 07:35:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 298. [2021-11-20 07:35:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.2926829268292683) internal successors, (371), 287 states have internal predecessors, (371), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:35:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 385 transitions. [2021-11-20 07:35:37,006 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 385 transitions. Word has length 68 [2021-11-20 07:35:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:37,007 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 385 transitions. [2021-11-20 07:35:37,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:35:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 385 transitions. [2021-11-20 07:35:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:35:37,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:37,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:37,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-20 07:35:37,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:37,226 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:35:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash -195035670, now seen corresponding path program 9 times [2021-11-20 07:35:37,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:37,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216557417] [2021-11-20 07:35:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:37,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:37,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:35:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:37,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:35:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:38,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:35:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:38,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:35:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 07:35:38,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:38,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216557417] [2021-11-20 07:35:38,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216557417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:38,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742804791] [2021-11-20 07:35:38,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:35:38,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:38,015 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:38,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c96896d-9de5-44e1-a104-6e9acf15f13f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process